500 ml bottle original Testomat® 808/BOB indicator 300 for measuring residual hardness.   Limit value:  0,02°dH residual hardness 0.0356 °fH 0.356 ppm CaCO3 0.00356 °mmol/l   Please notice, that 100 ml. bottles are only available in packages of 2 or 3 pieces.  

500 ml bottle original Testomat® 808/BOB 300 indicator for measuring residual hardness.   Limit value:  0,02°dH residual hardness 0.0356 °fH 0.356 ppm CaCO3 0.00356 °mmol/l    

100 ml bottle original Testomat® 808/BOB indicator 300S for measuring residual hardness.     Limit value:  0,05° dH residual hardness 0.089 °fH 0.89 ppm CaCO 0.0089 °mmol/l       Please notice, that 100 ml. bottles are only available in packages of 2 or 3 pieces.  

500 ml bottle original Testomat® 808/BOB indicator 300S for measuring residual hardness.   Limit value:  0,05° dH residual hardness 0.089 °fH 0.89 ppm CaCO3 0.0089 °mmol/l  

Residual Hardness Measurement with Testomat 808 – Indicator Solution Type 301 for Stable Analysis Results Original liquid chemistry from Heyl for residual hardness monitoring in technical water analysis With a threshold of 0.1 °dH, this indicator solution provides a reliable and precise reading of residual hardness, ideal for processes requiring continuous water monitoring. The liquid formulation allows easy handling and a dependable chemical reaction directly in the measuring device. Heyl's original indicator solution is suitable for use with the Testomat 808 and F-BOB series. With a guaranteed minimum shelf life of 7 months after shipment from our warehouse, the solution remains accurate and ready for use throughout the entire period. Features of Indicator 302 At a defined residual hardness threshold of 0.1 °dH, the indicator solution reacts reliably, making it a stable choice for medium hardness ranges. The bottles can be used directly in the device. The indicator ensures consistent dosing and reliable results over many measurement cycles. Applications of the Indicator Solution Boiler feed water monitoring Process water Reverse osmosis systems and technical supply systems

Testomat 808 Indicator 301 – Precise Measurement Original indicator solution, reliable determination of residual hardness in water The Testomat 808 Indicator 301, 500 ml bottle from Heyl, is an original indicator for the exact measurement of residual hardness with a threshold of 0.1 °dH. Suitable for the Testomat 808 and Testomat F-BOB devices. The Indicator 301 is reliable for monitoring residual hardness. It allows safe process control with minimal maintenance effort. Highly Precise Residual Hardness Determination The Testomat 808 Indicator 301 from Heyl is a specially developed original indicator for highly precise determination of residual hardness in water treatment systems. It is precisely calibrated to the measurement methodology of the Testomat 808 and Testomat F-BOB and ensures reliable detection of residual hardness up to a threshold of 0.1 °dH. Using the original Heyl indicator guarantees consistent measurement quality, as reaction behavior, color change, and stability are optimized for the device parameters. Only by using the original Testomat 808 Indicator can proper device functionality be ensured and the corresponding device warranty maintained. Frequently Asked Questions How long does the indicator/reagent keep? The shelf life of an indicator is printed on the product label for each batch. In accordance with our terms and conditions, we deliver with a guaranteed minimum shelf life of 7 months. How much indicator is used per analysis? When it comes to indicator consumption, a distinction must first be made between TH indicators (e.g. TH 2005, 2025, 2050, etc.), which are used for the Testomat ECO, Testomat EVO TH, Testomat 2000 and Testomat Limit LT analysis devices, and the indicators for the Testomat 808 (300 series indicators, e.g. indicators 301, 305, etc.). The indicator consumption per analysis for the TH indicators is directly related to the limit value to be monitored. The higher this is, the higher the indicator consumption. For the Testomat 808 indicators (300 series), consumption is approximately 80 µl per analysis. By entering the operating data (analysis interval, limit value, etc.), the exact consumption or indicator requirement per year can be determined using our indicator consumption calculator: Indicators - Consumption calculator - Heyl Neomeris What sizes are available for the bottles and is there anything to bear in mind? The indicator is available in both 500 ml and 100 ml bottles. The analyser is delivered with the 500 ml bottle set up and the scope of delivery includes the screw cap with hole and insert for the screw cap of the 500 ml indicator bottle. To use 100 ml bottles, the bottle size must be changed to 100 ml in the basic programming and the screw cap with hole and insert for the indicator must also be purchased (item no. 40143). Where can I find the safety data sheet? You can find the safety data sheets in the online shop (www.heylneomeris.shop) under the menu item – Service / Help – Downloads Safety Data Sheets. How can the indicator be disposed of? Disposal instructions can be found in section 13 of the safety data sheet. Disposal must be carried out in accordance with official regulations. Can the indicator still be used after the expiry date? The indicator can no longer be used after the expiry date. Once the indicator has expired, accurate measurement results can no longer be guaranteed. What is the optimal storage temperature for the indicator? Section 7 of the safety data sheet contains all relevant information on storing the indicator. The recommended storage temperature should be between 15 and 25°C. Device warranty / guarantee Measurement errors when using external indicators! The use of third-party indicators can lead to significant measurement deviations or errors. Damage caused by foreign particles in the area of the dosing pump, measuring chamber or valves is also possible. The use of third-party indicators will void the warranty! Only use original Heyl indicators, which are specially designed to meet the requirements of the measuring devices and thus guarantee accurate measurement results.

100 ml bottle original Testomat® 808/BOB indicator 302 for measuring residual hardness.     Limit value:  0,2° dH residual hardness 0.356 °fH 3.56 ppm CaCO3 0.0356 °mmol/l           Please notice, that 100 ml. bottles are only available in packages of 2 or 3 pieces.    

Testomat® 808 Indicator 302 500 ml Residual hardness threshold: 0.2 °dH for Testomat® 808 The Testomat 808 Indicator 302, 500 ml bottle, is designed for threshold monitoring of residual hardness at 0.2 °dH in water samples through color change. Indicator 302 enables precise measurement of residual hardness. It is optimized for the Testomat 808 and F-BOB to detect limescale deposits early. Precise Residual Hardness Monitoring at 0.2 °dH The Testomat® 808 Indicator 302 is a specially calibrated original indicator for reliable threshold monitoring of residual hardness in water samples at 0.2 °dH. The indicator solution is specifically designed for use with the Testomat® 808 and Testomat® F-BOB, enabling precise water hardness measurement through a clearly defined color change. Even the smallest deviations can be detected early, effectively preventing limescale deposits in downstream systems. Manufacturer Warranty and Original Indicators Full operational reliability and warranty claims for Testomat® devices can only be guaranteed when using original indicators. Using the original Indicator 302 ensures that measurement accuracy, device protection, and long-term reliability meet the manufacturer’s specifications. Frequently Asked Questions How long does the indicator/reagent keep? The shelf life of an indicator is printed on the product label for each batch. In accordance with our terms and conditions, we deliver with a guaranteed minimum shelf life of 7 months. How much indicator is used per analysis? When it comes to indicator consumption, a distinction must first be made between TH indicators (e.g. TH 2005, 2025, 2050, etc.), which are used for the Testomat ECO, Testomat EVO TH, Testomat 2000 and Testomat Limit LT analysis devices, and the indicators for the Testomat 808 (300 series indicators, e.g. indicators 301, 305, etc.). The indicator consumption per analysis for the TH indicators is directly related to the limit value to be monitored. The higher this is, the higher the indicator consumption. For the Testomat 808 indicators (300 series), consumption is approximately 80 µl per analysis. By entering the operating data (analysis interval, limit value, etc.), the exact consumption or indicator requirement per year can be determined using our indicator consumption calculator: Indicators - Consumption calculator - Heyl Neomeris What sizes are available for the bottles and is there anything to bear in mind? The indicator is available in both 500 ml and 100 ml bottles. The analyser is delivered with the 500 ml bottle set up and the scope of delivery includes the screw cap with hole and insert for the screw cap of the 500 ml indicator bottle. To use 100 ml bottles, the bottle size must be changed to 100 ml in the basic programming and the screw cap with hole and insert for the indicator must also be purchased (item no. 40143). Where can I find the safety data sheet? You can find the safety data sheets in the online shop (www.heylneomeris.shop) under the menu item – Service / Help – Downloads Safety Data Sheets. How can the indicator be disposed of? Disposal instructions can be found in section 13 of the safety data sheet. Disposal must be carried out in accordance with official regulations. Can the indicator still be used after the expiry date? The indicator can no longer be used after the expiry date. Once the indicator has expired, accurate measurement results can no longer be guaranteed. What is the optimal storage temperature for the indicator? Section 7 of the safety data sheet contains all relevant information on storing the indicator. The recommended storage temperature should be between 15 and 25°C. Device warranty / guarantee Measurement errors when using external indicators! The use of third-party indicators can lead to significant measurement deviations or errors. Damage caused by foreign particles in the area of the dosing pump, measuring chamber or valves is also possible. The use of third-party indicators will void the warranty! Only use original Heyl indicators, which are specially designed to meet the requirements of the measuring devices and thus guarantee accurate measurement results.

Testomat 808 Indicator 303 – Precise Residual Hardness Measurement Original indicator solution for determining residual hardness The Testomat 808 Indicator 303, 500 ml bottle from Heyl, is an original indicator solution for measuring residual hardness through color change with the Testomat 808 and Testomat F-BOB. It provides clear results at a threshold of 0.1 °dH. Indicator 303 is designed for residual hardness monitoring. With minimal maintenance, it enables safe process control. Highly Precise Residual Hardness Monitoring The Testomat 808 Indicator 303 from Heyl is a specially developed original indicator solution for precise measurement of residual hardness in water samples through a clearly defined color change. It is optimally calibrated for use with the Testomat 808 and Testomat F-BOB and delivers reliable measurement results at a threshold of 0.1 °dH. Thanks to its exact adaptation to the measurement methodology of the devices, it ensures high measurement accuracy and reproducibility. Deviations can be detected early, effectively preventing limescale formation. Manufacturer Warranty and Original Indicators The manufacturer’s warranty for Testomat® devices can only be guaranteed when using Heyl original indicators. Frequently Asked Questions How long does the indicator/reagent keep? The shelf life of an indicator is printed on the product label for each batch. In accordance with our terms and conditions, we deliver with a guaranteed minimum shelf life of 7 months. How much indicator is used per analysis? When it comes to indicator consumption, a distinction must first be made between TH indicators (e.g. TH 2005, 2025, 2050, etc.), which are used for the Testomat ECO, Testomat EVO TH, Testomat 2000 and Testomat Limit LT analysis devices, and the indicators for the Testomat 808 (300 series indicators, e.g. indicators 301, 305, etc.). The indicator consumption per analysis for the TH indicators is directly related to the limit value to be monitored. The higher this is, the higher the indicator consumption. For the Testomat 808 indicators (300 series), consumption is approximately 80 µl per analysis. By entering the operating data (analysis interval, limit value, etc.), the exact consumption or indicator requirement per year can be determined using our indicator consumption calculator: Indicators - Consumption calculator - Heyl Neomeris What sizes are available for the bottles and is there anything to bear in mind? The indicator is available in both 500 ml and 100 ml bottles. The analyser is delivered with the 500 ml bottle set up and the scope of delivery includes the screw cap with hole and insert for the screw cap of the 500 ml indicator bottle. To use 100 ml bottles, the bottle size must be changed to 100 ml in the basic programming and the screw cap with hole and insert for the indicator must also be purchased (item no. 40143). Where can I find the safety data sheet? You can find the safety data sheets in the online shop (www.heylneomeris.shop) under the menu item – Service / Help – Downloads Safety Data Sheets. How can the indicator be disposed of? Disposal instructions can be found in section 13 of the safety data sheet. Disposal must be carried out in accordance with official regulations. Can the indicator still be used after the expiry date? The indicator can no longer be used after the expiry date. Once the indicator has expired, accurate measurement results can no longer be guaranteed. What is the optimal storage temperature for the indicator? Section 7 of the safety data sheet contains all relevant information on storing the indicator. The recommended storage temperature should be between 15 and 25°C. Device warranty / guarantee Measurement errors when using external indicators! The use of third-party indicators can lead to significant measurement deviations or errors. Damage caused by foreign particles in the area of the dosing pump, measuring chamber or valves is also possible. The use of third-party indicators will void the warranty! Only use original Heyl indicators, which are specially designed to meet the requirements of the measuring devices and thus guarantee accurate measurement results.

100 ml bottle original Testomat® 808/BOB indicator for measuring residual hardness.   Limit value:  0,3° dH residual hardness 0.534 °fH 5.34 ppm CaCO3 0.0534 °mmol/l     Please notice, that 100 ml. bottles are only available in packages of 2 or 3 pieces.

100 ml bottle original Testomat® 808/BOB indicator 305 for measuring residual hardness.   Limit value:  0,5° dH residual hardness 0.89 °fH 8.9 ppm CaCO3 0.089 °mmol/l     Please notice, that 100 ml. bottles are only available in packages of 2 or 3 pieces.  

The Testomat 808 Indicator 305, 500 ml bottle, is an original indicator solution for measuring residual hardness with a threshold of 0.5 °dH. The indicator is specially designed for Testomat 808 and Testomat F-BOB devices, providing precise and reliable measurement results. Benefits of the Original Testomat 808 Indicator 305 from Heyl The Testomat 808 Indicator 305 is optimally matched to the requirements of Testomat 808 and Testomat F-BOB devices and ensures reliable results during continuous operation. Your Advantages When Using Original Heyl Indicators at a Glance Maximum Measurement Accuracy: Precisely defined composition for reproducible and accurate residual hardness measurements. Perfect Device Compatibility: 100 % matched to Testomat 808 and Testomat F-BOB – no calibration issues or incorrect measurements. Reliable Process Monitoring: Ideal for continuous monitoring of residual hardness. System Protection: Early and reliable detection of limit value exceedances protects downstream processes and components. Warranty and Safety Through Original Heyl Quality Using the original Testomat 808 Indicator 305 ensures that the manufacturer-specified measurement accuracy, functional safety, and device lifespan are fully maintained. Using original indicators is a prerequisite for: proper operation of Testomat measuring devices maintaining warranty and guarantee claims compliant and reliable process control With the original indicator, you invest in measurement reliability, process stability, and long-term operational safety – without compromise. Frequently Asked Questions How long does the indicator/reagent keep? The shelf life of an indicator is printed on the product label for each batch. In accordance with our terms and conditions, we deliver with a guaranteed minimum shelf life of 7 months. How much indicator is used per analysis? When it comes to indicator consumption, a distinction must first be made between TH indicators (e.g. TH 2005, 2025, 2050, etc.), which are used for the Testomat ECO, Testomat EVO TH, Testomat 2000 and Testomat Limit LT analysis devices, and the indicators for the Testomat 808 (300 series indicators, e.g. indicators 301, 305, etc.). The indicator consumption per analysis for the TH indicators is directly related to the limit value to be monitored. The higher this is, the higher the indicator consumption. For the Testomat 808 indicators (300 series), consumption is approximately 80 µl per analysis. By entering the operating data (analysis interval, limit value, etc.), the exact consumption or indicator requirement per year can be determined using our indicator consumption calculator: Indicators - Consumption calculator - Heyl Neomeris What sizes are available for the bottles and is there anything to bear in mind? The indicator is available in both 500 ml and 100 ml bottles. The analyser is delivered with the 500 ml bottle set up and the scope of delivery includes the screw cap with hole and insert for the screw cap of the 500 ml indicator bottle. To use 100 ml bottles, the bottle size must be changed to 100 ml in the basic programming and the screw cap with hole and insert for the indicator must also be purchased (item no. 40143). Where can I find the safety data sheet? You can find the safety data sheets in the online shop (www.heylneomeris.shop) under the menu item – Service / Help – Downloads Safety Data Sheets. How can the indicator be disposed of? Disposal instructions can be found in section 13 of the safety data sheet. Disposal must be carried out in accordance with official regulations. Can the indicator still be used after the expiry date? The indicator can no longer be used after the expiry date. Once the indicator has expired, accurate measurement results can no longer be guaranteed. What is the optimal storage temperature for the indicator? Section 7 of the safety data sheet contains all relevant information on storing the indicator. The recommended storage temperature should be between 15 and 25°C. Device warranty / guarantee Measurement errors when using external indicators! The use of third-party indicators can lead to significant measurement deviations or errors. Damage caused by foreign particles in the area of the dosing pump, measuring chamber or valves is also possible. The use of third-party indicators will void the warranty! Only use original Heyl indicators, which are specially designed to meet the requirements of the measuring devices and thus guarantee accurate measurement results.

Original Testomat 808 Indicator 310 from Heyl for Residual Hardness Monitoring Residual hardness threshold: 1 °dH for Testomat 808 and F-BOB The Testomat 808 Indicator 310, 500 ml bottle, measures the residual hardness in water as a threshold monitor with color change for the Testomat 808 and F-BOB. The threshold is set at 1 °dH. The Indicator 310 enables reliable threshold measurement of residual hardness through a color reaction. Benefits of the Original Testomat 808 Indicator 310 The Testomat 808 Indicator 310 is the original indicator solution from Heyl for monitoring residual hardness in water with a threshold of 1 °dH. Its clearly defined color change ensures safe and easily readable measurement results on the Testomat 808 and F-BOB devices. Your Advantages When Using Heyl Original Indicators for Testomat 808 at a Glance Reliable Threshold Measurement: Clear indication via green or red signal for safe detection of residual hardness exceeding 1 °dH. Optimized for the Measuring Device: Specifically designed for Testomat 808 and Testomat F-BOB – ensures trouble-free operation and precise results. High Process Reliability: Ideal for continuous monitoring of residual hardness in water-carrying processes. Consistent Indicator Quality: Ensures reproducible results throughout the entire usage period. Warranty and Operational Safety with Original Indicator 310 for Testomat 808 from Heyl Using the original Testomat 808 Indicator 310 is crucial for reliable measurement function and proper operation of the Testomat devices. Using original indicators ensures: compliance with manufacturer specifications full measurement accuracy and operational reliability retention of warranty and guarantee claims long-term protection for downstream systems With the original Testomat 808 Indicator 310, you rely on dependable threshold monitoring, stable processes, and maximum operational safety. Frequently Asked Questions How long does the indicator/reagent keep? The shelf life of an indicator is printed on the product label for each batch. In accordance with our terms and conditions, we deliver with a guaranteed minimum shelf life of 7 months. How much indicator is used per analysis? When it comes to indicator consumption, a distinction must first be made between TH indicators (e.g. TH 2005, 2025, 2050, etc.), which are used for the Testomat ECO, Testomat EVO TH, Testomat 2000 and Testomat Limit LT analysis devices, and the indicators for the Testomat 808 (300 series indicators, e.g. indicators 301, 305, etc.). The indicator consumption per analysis for the TH indicators is directly related to the limit value to be monitored. The higher this is, the higher the indicator consumption. For the Testomat 808 indicators (300 series), consumption is approximately 80 µl per analysis. By entering the operating data (analysis interval, limit value, etc.), the exact consumption or indicator requirement per year can be determined using our indicator consumption calculator: Indicators - Consumption calculator - Heyl Neomeris What sizes are available for the bottles and is there anything to bear in mind? The indicator is available in both 500 ml and 100 ml bottles. The analyser is delivered with the 500 ml bottle set up and the scope of delivery includes the screw cap with hole and insert for the screw cap of the 500 ml indicator bottle. To use 100 ml bottles, the bottle size must be changed to 100 ml in the basic programming and the screw cap with hole and insert for the indicator must also be purchased (item no. 40143). Where can I find the safety data sheet? You can find the safety data sheets in the online shop (www.heylneomeris.shop) under the menu item – Service / Help – Downloads Safety Data Sheets. How can the indicator be disposed of? Disposal instructions can be found in section 13 of the safety data sheet. Disposal must be carried out in accordance with official regulations. Can the indicator still be used after the expiry date? The indicator can no longer be used after the expiry date. Once the indicator has expired, accurate measurement results can no longer be guaranteed. What is the optimal storage temperature for the indicator? Section 7 of the safety data sheet contains all relevant information on storing the indicator. The recommended storage temperature should be between 15 and 25°C. Device warranty / guarantee Measurement errors when using external indicators! The use of third-party indicators can lead to significant measurement deviations or errors. Damage caused by foreign particles in the area of the dosing pump, measuring chamber or valves is also possible. The use of third-party indicators will void the warranty! Only use original Heyl indicators, which are specially designed to meet the requirements of the measuring devices and thus guarantee accurate measurement results.

100 ml bottle original Testomat® 808/BOB indicator 310 for measuring residual hardness.   Limit value:  1°dH residual hardness 1.78 °fH 17.8 ppm CaCO3 0.178 °mmol/l   Please notice, that 100 ml. bottles are only available in packages of 2 or 3 pieces.  

100 ml bottle original Testomat® 808/BOB indicator 320 for measuring residual hardness.   Limit value:  2° dH residual hardness 3.56 °fH 35.6 ppm CaCO3 0.356 °mmol/l   Please notice, that 100 ml. bottles are only available in packages of 2 or 3 pieces.  

500 ml bottle original Testomat® 808/BOB indicator 320 for measuring residual hardness.   Limit value:  2°dH residual hardness 3.56 °fH 35.6 ppm CaCO3 0.356 °mmol/l  

Heyl Testomat 808 Original Indicator 330 Residual hardness threshold measurement with the Testomat 808 The Testomat 808 Indicator 330, 500 ml bottle, is used for measuring residual hardness. Indicator 330 monitors residual hardness at a value of 1.5 °dH and is suitable for use with the Testomat 808 and F-BOB devices. Testomat 808 Indicator 330 – Reliable Residual Hardness Monitoring at 1.5 °dH The Testomat 808 Indicator 330 was specifically developed for monitoring residual hardness in water treatment. With a defined threshold of 1.5 °dH, this indicator solution is ideal for applications with the corresponding water hardness. It is fully compatible with Testomat 808 and Testomat F-BOB devices and ensures stable, continuous measurement in your water treatment processes. The original indicator from Heyl provides a clear and reliable color change, allowing for a quick assessment of water quality. Using the original indicator solution ensures high process reliability and supports uninterrupted operation of your systems. Heyl Original Indicator – Your Safety for Measurement, Device, and Warranty Using the original Testomat 808 Indicator 330 is an essential part of reliable residual hardness monitoring. Only original indicator solutions ensure that the manufacturer’s specified measurement accuracy and functional parameters are consistently maintained. At the same time, using the original indicator ensures: the retention of warranty and guarantee claims proper operation of the measuring devices precise measurement results and long-term investment and operational security Frequently Asked Questions How long does the indicator/reagent keep? The shelf life of an indicator is printed on the product label for each batch. In accordance with our terms and conditions, we deliver with a guaranteed minimum shelf life of 7 months. How much indicator is used per analysis? When it comes to indicator consumption, a distinction must first be made between TH indicators (e.g. TH 2005, 2025, 2050, etc.), which are used for the Testomat ECO, Testomat EVO TH, Testomat 2000 and Testomat Limit LT analysis devices, and the indicators for the Testomat 808 (300 series indicators, e.g. indicators 301, 305, etc.). The indicator consumption per analysis for the TH indicators is directly related to the limit value to be monitored. The higher this is, the higher the indicator consumption. For the Testomat 808 indicators (300 series), consumption is approximately 80 µl per analysis. By entering the operating data (analysis interval, limit value, etc.), the exact consumption or indicator requirement per year can be determined using our indicator consumption calculator: Indicators - Consumption calculator - Heyl Neomeris What sizes are available for the bottles and is there anything to bear in mind? The indicator is available in both 500 ml and 100 ml bottles. The analyser is delivered with the 500 ml bottle set up and the scope of delivery includes the screw cap with hole and insert for the screw cap of the 500 ml indicator bottle. To use 100 ml bottles, the bottle size must be changed to 100 ml in the basic programming and the screw cap with hole and insert for the indicator must also be purchased (item no. 40143). Where can I find the safety data sheet? You can find the safety data sheets in the online shop (www.heylneomeris.shop) under the menu item – Service / Help – Downloads Safety Data Sheets. How can the indicator be disposed of? Disposal instructions can be found in section 13 of the safety data sheet. Disposal must be carried out in accordance with official regulations. Can the indicator still be used after the expiry date? The indicator can no longer be used after the expiry date. Once the indicator has expired, accurate measurement results can no longer be guaranteed. What is the optimal storage temperature for the indicator? Section 7 of the safety data sheet contains all relevant information on storing the indicator. The recommended storage temperature should be between 15 and 25°C. Device warranty / guarantee Measurement errors when using external indicators! The use of third-party indicators can lead to significant measurement deviations or errors. Damage caused by foreign particles in the area of the dosing pump, measuring chamber or valves is also possible. The use of third-party indicators will void the warranty! Only use original Heyl indicators, which are specially designed to meet the requirements of the measuring devices and thus guarantee accurate measurement results.

100 ml bottle original Testomat® 808/BOB indicator 330 for measuring residual hardness.   Limit value:  3° dH residual hardness 5.34 °fH 53.4 ppm CaCO3 0.534 °mmol/l       Please notice, that 100 ml. bottles are only available in packages of 2 or 3 pieces.  

500 ml bottle original Testomat® 808/BOB indicator 350 for measuring residual hardness.   Limit value:  5°dH residual hardness 8.93 °fH 89.3 ppm CaCO3 0.893 °mmol/l