Hydrogen Sulfide Source for CAL 2000LT, 10 hours, must specify range

Hydrogen Sulfide H₂S, 10 hour field replaceable and interchangeable electrochemical generating source for use with ACD CAL 2000LT. You must specify the range between 1-25 ppm.

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CAL 2000LT Gas Generator Literature

Cost Comparison of the CAL 2000 vs the cost of cylinders