Wide Voltage Range Combustible Gas Detector

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The HM-712N series combustible gas detector works on wide range voltage of AC100V-AC240V. It can also be powered by the backup battery. When the power is off, the backup battery would replace the power source to power the product automatically. The battery is chosen by the users themselves. Designed with the European style appearance, the product looks nice and elegant. Its alarm indication includes 85dB/m alarm sound and three LED indicators indicating power source, fault and alarm respectively.

When the gas concentration climbs up to the alarm concentration, the wide voltage range combustible gas detector would give the alarm. When the concentration of the combustible gas in the air decreases below the alarm concentration, the product would reset automatically. During the production process, the semi-finished product would go through the ageing for 8 to 12 hours. Then, we carry out the gas calibration to the semi-finished product. After being assembled completely, we would conduct the 12-hour ageing to the finished product to guarantee 100% ex-factory pass rate.

Additionally, the wide voltage range combustible gas detector is manufactured by following the standard of GB15322.2-2003.

Model and Basic Function

Model	Operating Voltage	Basic Function
HM-712NS-AB	AC110-240V	Alarm Indication: 85dB/m Alarm Sound and Red LED Indicator FlashingBasic Function: Support the Backup Battery
HM-712NVS-AB	AC110-240V	Alarm Indication: Sound and Flash AlarmBasic Function: Outputting the DC12V Pulse Signal for Driving the Electromagnetic Valve to Turn off the Gas Source for Avoiding Greater Loss
HM-712NFS-AB	AC110-240V	Alarm Indication: Sound and Flash Alarm Basic Function: Outputting A Normally Open Signal for Controlling Alarm Controller or Driving Fan to Disperse the Combustible Gas
HM-712NVF-AB	AC110-240V	Alarm Indication: Sound and Flash AlarmBasic Function: Outputting A Normally Open Signal to the Control Host, or for Driving the Fan to Disperse the Combustible Gas and Driving the Electromagnetic Valve to Close the Valve for Stopping Gas Leakage

Technical Specification

Model	HM-712NS-AB	HM-712NVS-AC	HM-712NFS-AB	HM-712NVF-AB
Type	Independent Type	Independent Type with 12V Pulse Output to Drive Electromagnetic Valve	Independent Type with Normally Open Relay Output to Drive Fan	Independent Type with 12V Pulse Output to Drive Electromagnetic Valve and Normally Open Relay Output to Drive Fan
Operating Voltage	AC100-240V Plus 9V Backup Battery
Sensor	Semiconductor Sensor
Alarm Concentration	10% (± 5%) Lower Explosive Limit of Natural Gas
Alarm Sound Pressure	85dB/m
Alarm Output	Not Available	12V Pulse Output	Normally Open Relay Output	12V Pulse Output and Normally Open Relay Output
Working Environment	Temperature Range: -10℃ ~ 55℃ Humidity Range: 10%~95% RH (No Condensation Phenomenon)
Dimension	118.5×82×43mm

Related Names
Natural Gas Detector | Home Gas Detector | Combustible Gas Alarm

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