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The HI98318 EC/TDS tester has a graphite sensor that reduces the polarization effect common with amperometric testers that use two stainless steel pins
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TrolMaster Carbon X CO2 Sensor W/ Cable Happy Frog The HI98318 EC/TDS tester hasThe ability to read up to 30,000 ppm CO2 is critical to the proper operation and safety of an emergency CO2 system like the Carbon X. The MBS K30 is Trolmasters newest CO2 sensor, which incorporates a NDIR 0 30,000 ppm sensor in a self aspirated enclosure. The MBS K30 also features a built in LCD display that will constantly display the current CO2 level (ppm). Each of the zones rooms monitored by the Carbon X can have 1 or 2 MBS K30 CO2 sensors
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