The portable Jerome 631-X Hydrogen Sulfide (H₂S) Analyzer offers a low detection range for odor and corrosion control, safety, and leak detection in such industries as wastewater treatment, oil and gas, pulp and paper, and farming. This simple-to-use instrument weighs only 7 pounds, utilizes an internal rechargeable battery pack or AC power, and is easily carried to suspected sources of H₂S for detection and measurement. Locked in survey mode, the 631-X automatically displays hydrogen sulfide concentrations as quickly as every 3 seconds. The Jerome 631-X utilizes a patented gold film sensor, and its sensitivity to hydrogen sulfide eliminates interferences from sulfur dioxide (SO₂), carbon dioxide (CO₂), carbon monoxide (CO), and water vapors. When the sample button is pressed, an internal pump draws air into the instrument. Any H₂S in the sample is absorbed by the sensor, which registers a proportional change in electrical resistance. The H₂S concentration is displayed on the LCD, where it remains until the next sample is taken. An internal option board allows auto-zeroing, DC power operation, timed regeneration, and timed sampling during prolonged, unattended sampling periods. The option board allows external fresh air solenoid support and 4-20 mA or 0-2 V analog output.

The analyzer is shipped in a molded hard carrying case. A low-level Functional Test Module (to verify calibration in the field) and a data logger can be ordered with the unit (additional charges apply). Recorded data can be downloaded later to a computer using the JCS software for analysis, printout, and permanent record keeping (additional rental charges apply).