Jerome 651-Hydrogen Sulfide Monitoring System

Jerome 651-Hydrogen Sulfide Monitoring System

Jerome 651-Hydrogen Sulfide Monitoring System

SKU: X651-0111

  • A$47,059.00
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The Jerome® 651 monitoring system from Arizona Instrument LLC 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

Unattended: 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
Resolution: 0.001, 0.01, 0.1, and 1 ppm
Accuracy: ±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
Display: 8 digit alphanumeric LCD
Output: Nano Radio
Analog: 4-20 mA passive current loop
Dimensions: 26″ W x 25″ H x 9″ D
(67 cm W x 64 cm H x 23 cm D)
Weight: 52 lbs. (24 kg)
Warranty: 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


Jerome J651 Brochure