call us on 0800 832 732
Jerome 631

Jerome 631

Gold Film Hydrogen Sulfide Analyzer

The portable Jerome® 631 Hydrogen Sulfide Analyzer displays low-level concentrations in just seconds. It offers an analysis range of 0.003-50 ppm 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 utilizes an internal rechargeable battery pack or AC power, and is easily carried to suspected sources of hydrogen sulfide for detection and measurement. Locked in survey mode, the 631-X automatically displays hydrogen sulfide concentrations as quickly as every 3 seconds.

Features & Benefits

  • Meets EPA & ATSDR Cleanup Levels
  • Optional Data Logging
  • Rugged design | Easy to operate
  • Inherently stable gold film sensor
  • Pressure sensitive membrane switch operation
  • Rechargeable internal battery pack for portability
  • Wide detection range allows for multiple applications
  • Automatic LCD backlight during low light conditions
  • Survey mode for rapid source detection of hydrogen sulfide concentrations
  • Microprocessor ensures a linear response throughout the entire range of the sensor
  • Functional Test Module (FTM) verifies instrument functions correctly between recommended annual factory calibrations

Quick specs

  • Resolution:    0.001 ppm
  • Detection Range:    3 ppb (0.003 ppm) – 50 ppm in four graduated ranges
  • Data Storage Capacity:    With optional data logger: 1,000 data points
  • Operating Environment:    0 – 40°C Non-Condensing, Non-Explosive
  • Accuracy:    0.05 ppm ±0.003 ppm (range 0)
    0.5 ppm ±0.03 ppm (range 1)
    5 ppm ±0.3 ppm (range 2)
    25 ppm ±2 ppm (range 3)
  • Typical Response Time:    Dependent on Range and Mode
    SURVEY MODE: 3-20 seconds
    SAMPLE MODE: 13-30 seconds
  • Flow Rate:    150 ± 10 ml/min (0.15 ± liters/min)
  • Power Requirements:    100-120 V~, 50/60 Hz, 1 A or 220-240 V~, 50/60 Hz, 1 A
  • Internal Battery Pack:    Rechargeable nickel cadmium
  • Dimensions:    Standard: 13″ L x 6″ W x 4″ H
    XE: 14″ L x 7″ W x 7″ H
  • Weight:    Standard: 7 lbs.
    XE: 8 lbs.
  • Output:    RS-232 Serial, Baud Rate 1200 for use with data logger, and/or
    Jerome® Communication Program, 20 mA Digital Current Output
  • Warranty:    1 year, factory parts and labor

btn enquire    Datasheet    user manual

You might also be interested in ...

SPM Flex Vertex Multi-Point Toxic Gas Monitoring System Vertex M Jerome J405

SPM Flex

Vertex Multi-Point Toxic Gas Monitoring System

Vertex M

Jerome J405

about us

APC Techsafe a division of NZ Safety Blackwoods are market leaders in Gas Detection, Instrumentation, Flow Control and Hose & Fittings in New Zealand. With over 35 years of experience bringing the latest technologies from the world’s leading suppliers to market, offering supply, assembly, service, calibration, training and support nationwide....

read more »
APC Techsafe logo


contact us

Postal Address
Private Bag 92-100
Victoria Street
West 1142
Avondale Office (Gas Detection)
660 Rosebank Road
Auckland 1026

view map »

Christchurch Trade Centre (Gas Detection, Hose, Valves)
Corner of Lunns and Curletts Road

view map »

Technical Trade Centre (Hose, Valves)
21 El Kobar Drive
East Tāmaki
Auckland 2013

view map »
  • Wesfarmers Industrial And Safety
  • NZSB logo stacked
  • NZSB WST - Black Reverse Stacked resized