SBS-H2-DoD: Hydrogen Gas Detector

Designed to meet the US Department of Defense (DoD)’s rigorous UFC 3-520-05 requirements, the SBS-H2-DoD Hydrogen Detector is an upgrade of our popular SBS-H2 system, providing improved Lower Explosive Limit (LEL) detection levels. It is currently used by the Army, Navy and NASA.

Traditional detectors are designed to measure the amount of hydrogen gas in the air and provide warnings when gas levels reach 25 percent and 50 percent of the LEL concentration. The SBS-H2-DoD detects hydrogen at 12.5 percent and 25 percent of the LEL – a significant additional safety margin that is critical for military applications. The detector’s lower alert levels equal more time to address the issue creating the hydrogen gas, and more time means increased overall safety.

The SBS-H2-DoD has visual and audible alarms and 0.5% and 1% hydrogen relays. The device features CAT cable connections between the main unit and up to three sensors, leading to easier installs and retrofits into sensitive and classified environments. Each sensor monitors up to 600 square feet of space and can be powered by AC and/or DC power.

The system comes complete with the main control, a highly accurate hydrogen gas sensor and a 25 ft. cable. This unit can be powered with AC and/or DC power and can be mounted directly to a wall or to an electrical box, making it extremely versatile and very user-friendly.

The SBS-H2-DoD includes relays for remote connection to alarm/monitoring systems and for control of external relays for an exhaust fan.

  • Universal power inputs: 110/220 Vac and/or 12–48 Vdc input
  • Strobe light for visual alerts
  • Sensor status indicator LEDs on the main control
  • Modular design for optimal placement of sensor(s)
  • NRTL/C Certified: UL Std. No 61010-1 & CAN/CSA-C22.2 No. 61010-1-12
  • UFC 3-520-05, January 2020
  • Fail safe mode in event of loss of power
  • Up to three (3) sensors can be installed to main control to meet space coverage requirements
  • Substations
  • Battery rooms
  • Uninterruptible power supply (UPS)
  • Battery cabinet systems
  • Battery charging areas
  • Hydrogen fueled back-up power systems
  • Wall or 2-gang junction box mountable
  • Mechanical relays are easily accessible:
    • Warning 25% relay, 15 A @ 120 Vac; 10 A @ 277 Vac; 10 A @ 28 Vdc
    • Alarm 50% relay, 0.5 A resistive @ 28 Vdc, 0.5 A @ 125 Vac
  • Redundant power supply capability; dual AC and/or DC power supply connections (DC power supply will operate as backup power source)
  • Indicator LEDs can be tested by pushing the red “TEST” button
  • Sensors can be tested in the field with the P/N C4H10-TESTKIT

Detector can operate exhaust fans and building alarms / SCADA systems:

Warning Settings: Should the concentration of hydrogen gas in the air surrounding the sensor reach 0.5% by volume, the “0.5% Warning” yellow LED will light up on the main control of the unit. In addition, the 0.5% internal relay will energize and can be used to activate an external exhaust fan or a building management/alarm system (via SCADA Modbus).

Alarm Settings: Should the hydrogen gas concentration reach 1% by volume, the “1% Alarm” red LED will light up, the strobe will flash and an audible alarm will sound. In addition, the 1% internal relay will energize and can be used to activate a building management/alarm system (via SCADA/Modbus).

SBS-H2-DoD Includes

    • Main unit
    • Butane / Isobutane sensor
    • 25 ft. cable
Power Supply(s) 110/220 Vac, 50/60 Hz and/or12–48 Vdc (9–58 Vdc operating voltage)
12.5% LEL (Lower Explosive Limit) Dry contacts rated 10A/250 Vac
25% LEL (Lower Explosive Limit) Dry contacts rated .5A/28 Vdc
Dimensions 4.7" L x 4.7" W x 1.2" D (main control)
  • Alarm system can be tested in the field with p/n H2-TESTKIT option.
  • Additional Hydrogen Sensor with 25 ft., 50 ft. or 100 ft. Cable
  • Unit can be powered with either AC or DC power and can be mounted directly to a wall or to an electrical box, making it extremely versatile and user-friendly. Additional mounting options in data sheet.
Part No. Description
H2-SENSOR-25FT Additional hydrogen sensor with 25 ft. cable
H2-SENSOR-50FT Additional hydrogen sensor with 50 ft. cable
H2-SENSOR-100FT Additional hydrogen sensor with 100 ft. cable
H2-TESTKIT-DoD Test kit (includes 1% and 2% hydrogen, regulator, tubing and case) Note: cannot ship via air freight
H2-JB 4 11/16" x 4 11/16" 2-gang junction box
E190399 AC Cord 110 V, 10 A, 10 ft. with plug