HY-ALERTA™ 600 Fixed Area Hydrogen Monitor

General Details

H2scan’s HY-ALERTA™ 600 Fixed Area Hydrogen Monitor will provide hydrogen-specific leak detection and  measurement for hydrogen concentrations as low as 4000 ppm and can be scaled to any concentration up to 5% hydrogen by volume, a range representing 10% to 125% of hydrogen’s low flammability limit.

The monitor is  designed for either ceiling or wall mount and has an RS422 capability that extends the interface from the sensor to the controller to several hundred feet.  H2scan’s hydrogen-specific sensor technology has no cross sensitivity to any other combustible gases, thus eliminating false positive alarms and increasing system reliability.

Technical Details


Hydrogen Sensitivity Range:

0.4% to 5.0% hydrogen by volume, 
10% to 125% hydrogen lower flammable limit

Initial Response Time in seconds
Ingress Protection: IP64 capable
Field Verification/Calibration Period: 1 year
Product Life Expectancy: 10 years


Interface Options   

Input Voltage Range: 8 VDC to 13 VDC 
Input Current: 1.0 A 
Analog Outputs:
Output Voltages – OR –  Output Currents
• 0 VDC to 5 VDC    • 4 mA to 20 mA
• 1 VDC to 5 VDC    • 0 mA to 20 mA 
• 0 VDC to 4 VDC    • User-specific mA range 
• 0.5 VDC to 4.5 VDC 
• User-specific VDC range 
Serial Communication Options:  RS232 or RS422 
Relay Contacts: Two programmable 60 VDC / 1 A SPDT relays with both normally open (N.O.) and normally closed (N.C.) contacts.

Operating Conditions

Operating Temperature Range:  -20ºC to 40ºC
Storage Temperature Range:  -40ºC to 50ºC 
Operating Humidity:  0% to 95% RH 
Calibration Background Gas:  Air


Total Length:  7.2 in. 
Mounting Bracket Length:  5.6 in. 
Total Width:  4.4 in. 
Mounting Bracket Width:  4.0 in. 
Depth:  1.6 in.


4m power/analog cable
4m serial cable
Cal cup assembly