Check the listing for details. Hach CO2 Test Kit CA-23 Carbon Dioxide 1436-01. Condition: Used. Listed at 44.10 USD. This Hach CO2 Test Kit CA-23 Carbon Dioxide 1436-01 is an excellent tool for testing the carbon dioxide levels in your business or industrial setting. It is a reliable and accurate meter that provides quick and efficient results. The kit is designed to measure the pH, conductivity, and TDS of your water, making it a perfect addition to your testing equipment. The Hach CO2 Test Kit CA-23 Carbon Dioxide 1436-01 is manufactured by Hach, a well-known brand in the test, measurement, and inspection industry. This meter is ideal for those in the business and industrial fields who require precise and reliable testing results. With this kit, you can easily monitor your water's carbon dioxide levels and make necessary adjustments to ensure optimal results.