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H2 - Hydrogen Gas Detector

For lead-acid battery charging rooms and other areas where hydrogen is present protects life, property and profits.

hydrogen productLead-acid batteries on charge emit hydrogen gas after reaching the 80% recharge point.

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pdf  Installation & Operation Instructions
pdf  Installation Diagram
pdf  Optional Accessories
pdf  FAQ
pdf  Warranty
Typical hydrogen emissions for motive-power batteries are: spacer29
battery size hydrogen gas   spacer28
12 Volt / 500 Ampere-Hour
24 Volt / 720 Ampere-Hour
36 Volt / 935 Ampere-Hour
48 Volt / 850 Ampere-Hour
3.5 Cubic Feet Per Hour
10.1 Cubic Feet Per Hour
19.8 Cubic Feet Per Hour
23.9 Cubic Feet Per Hour
Concentrations of 4.1% to 75% mixed with air can be explosive. Sparks or hot surfaces can ignite them. An Arrgh!! hydrogen gas detector in your battery room will provide a warning and facilitate dissipation of hydrogen concentrations before they reach the lower explosive limit (LEL) of 4.1%. spacer26
operation location benefits spacer25
Should the concentration of hydrogen gas in the air surrounding the sensor reach 1% by volume (10,000 ppm), the "1% Caution" yellow LED will light and the 1% internal relay will close. Should the hydrogen gas concentration reach 2% by volume (20,000 ppm), the "2% Warning" red LED will flash and an 80 db alarm will sound; the 1% relay will remain closed and, if a Dual-Relay model, the 2% internal relay will close. Either relay can activate a remote exhaust fan and/or alarm.   Hydrogen is colorless and odorless, the lightest of all gases and thus rises. The detector, therefore, should be installed at the highest, draft-free location in the battery compartment or room where hydrogen gas would accumulate.

The size of the area one detector will protect depends upon the battery compartment or room. The detector measures hydrogen gas concentration in the air immediately surrounding the sensor. If hydrogen gas might accumulate in several, unconnected areas in the compartment or room, individual detectors should be placed at each location.

In addition to protecting your employees and your property, the detector also may reduce the following costs:

• Electricity - Heating - Air Conditioning. Instead of continuously running an exhaust fan to prevent hydrogen gas accumulation, use the detector to activate the fan only if the concentration reaches 1%.

• Insurance. Installation of a detector in areas where batteries are charged may result in a premium reduction.

features   specifications   sensor   spacer23
Automatic Operation, Continuous Monitoring, High Sensitivity & Stability, Solid State Reliability, Safe, 12 Volt dc Operating Voltage, Easy Installation, Low Cost, Two Year Warranty  

Height 7 " (17.8 cm.)
Width 4-3/4 " (12.0 cm.)
Depth 2-1/2 " ( 5.5 cm.)

Four 3/16 " (4.5 mm.) screws

Power Requirements:
120 volts ac 50/60 hertz standard.
220 volts ac, or 12 to 48 volts dc upon request.

Form A, Normally-Open standard.
Form B, Normally-Closed upon request.
Form C, Available at additional cost.

Operating Temperature:
14 to 104 degrees F ( -10 to 40
degrees C)

  The sensor consists of a semiconductor whose electrical conductivity increases when hydrogen is adsorbed on its surface. Conductivity, proportional to the gas concentration, is continuously measured by an electronic circuit. spacer22
  accessories   spacer21
• Steel junction box for hard-wiring to
wall or ceiling.
• Remote box (modular jack with duplicate LEDs, test button, and buzzer if needed) for placement at eye-level or in another room.
• Telephone-type modular cable for connecting the remote box to the detector.
  © Arrgh!! Manufacturing Co Inc. Site Design: JRA write|design spacer19
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