Jerome 651-Hydrogen Sulfide Monitoring System

$33,378.00 - $35,954.00

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Note: Accessory kits (sold separately) are necessary to operate this product. Accessory kits and other requirements like power cords can be purchased using the following links:
Purchase Jerome® accessory kits
Purchase power cords (only for 220V)
Purchase Operation Manual

Gold Film Fence-line Hydrogen Sulfide Monitoring System 

The Jerome® 651 monitoring system from AMTEK Brookfield is the system you need to solve your hydrogen sulfide monitoring problems. Designed to provide long-term monitoring even in extreme weather conditions, it can be stationed at any location. Multiple units can be linked to form a perimeter monitoring system. Data logging and radio telemetry capabilities make downloading data convenient and easy from a remote PC. 

  • Autonomous: The 651 is designed for set-and-forget hydrogen sulfide monitoring, inside or out.
  • Flexible: A detachable hand-held hydrogen sulfide analyzer is contained within the unit for pinpointing a gas source.
  • Smart Alarms: Define alarm points that meet your needs and receive email notifications and warnings.
  • Wireless: Measurement data is transmitted wirelessly from 651 stations to the user’s PC.
  • Rugged: The 651 is housed in a steel casing, insulated, air-conditioned, and ready for nearly any environment.

Features and Benefits

  • Perimeter Monitoring: Multiple Jerome® 651 units can be linked to form a perimeter monitoring system to help locate the source of H2S and ensure safety and compliance.
  • Detachable Unit: Quickly and easily sweep an area for hydrogen sulfide hot spots with the detachable, hand-held Jerome® 631-X hydrogen sulfide analyzer.
  • Gold Film Sensor: Validated in the field and in the lab for over 35 years, our proprietary gold film sensor ensures repeatable results across a wide range of applications.
  • Weather Station: An attached weather station monitors outside temperature as well as wind speed and direction for increased accuracy in pinpointing the source of odor contamination.
  • Data Transmission: Advanced data logging and radio telemetry capabilities make downloading data to a remote PC easy and convenient.
  • PC Software: Intuitive PC software with user-selectable time-weighted average reporting and a site view tab give users a bird’s eye view of the monitoring system as a whole.
  • Programmable Alarms: The 651 comes with programmable alarms that automatically send email alerts if your H2S levels rise above your specified upper limit.
  • Temperature Controlled Interior: Resistive heating and thermoelectric cooling keep the interior of the 651 at a consistent temperature for increased accuracy.
  • Regulatory Compliance: The 651 is in active use by many regulatory agencies and landfills, water treatment, and wastewater management facilities across the world.


Detection Range:

3 ppb (0.003 ppm) to 50 ppm


0.001, 0.01, 0.1, and 1 ppm


±0.005 ppm at 0.05 ppm
±0.05 ppm at 0.5 ppm
±0.5 ppm at 5 ppm
±2 ppm at 25 ppm

Sample Intervals:

1, 2, 5, 10, 15, 30, 60 or 120 minutes

Regeneration Intervals:

6, 12, 24 and 48 hours

Flow Rate:

150 mL/min

Operating Environment:

 -40 to +55°C, non-explosive, 0-100% relative humidity

Result Units:

ppm, ppb

Data Storage Capacity:

50,000 readings

Power Requirements
(651 Unit):

100-120 VAC, 50/60 Hz, 7 A or
210-240 VAC, 50/60 Hz, 4 A

Control Board Fuse:

Fast-acting IEC 1.6 A 250 V, 5 mm x 20 mm

Case Construction:

Polyester with insulation to reduce heat transfer

(Detached 631-X Unit):

Rechargeable NiCad
6-hour life

Estimated Sensor Life:

3 to 6 months depending on operating conditions


8 digit alphanumeric LCD


Nano Radio
Analog: 4-20 mA passive current loop


26″ W x 25″ H x 9″ D
(67 cm W x 64 cm H x 23 cm D)


52 lbs. (24 kg)


1 year, factory parts and labor except for the 631-X sensor

Nano Radio Modem Specifications

Frequency: 2.4 – 2.4835 GHz (2400 MHz)
49 selectable channels
Serial Interface: RS-232
Power Requirements: 10-30 VDC, 450 mA
Operating Temperature: -40°C to 75°C
Range: Up to 4 miles (6.4 km) “line of sight.”
Longer distances may be obtainable
through use of a high gain antenna
or by using the optional Radio Repeater

Contact our sales team for more information on our Jerome® series. 


Jerome J651 Brochure