SBS SBS-H2 Installation, Operating, & Maintenance Instructions
N56 W16665 Ridgewood Drive
Compliant with NFPA 70E ® and IEEE recommendations
Hydrogen sensor is UL Class 1 Division 2
Pre-March 2016 Design - Click to be redirected to newer SBS-H2 design
Menomonee Falls, WI 53051
SBS-H2
Hydrogen Gas Detector Kit
For battery charging rooms and other areas where hydrogen gas may be present
INSTALLATION, OPERATING &
MAINTENANCE INSTRUCTIONS
Protects Life, Property, and Profits
1-800-554-2243
www.sbsbattery.com ■ TEST@sbsbattery.com
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SBS-H2 Users Manual Rev 1.4 January 6th 2013
Table of Contents:
Pre-March 2016 Version
Description Page Section
Overview 3 1.0
Benefits 3 2.0
How It Works 3 3.0
Specifications 4 4.0
Sensor 4 5.0
Mounting Location 5 6.0
Installation 6 7.0
Operation 10 8.0
Electrical Testing 10 9.0
Calibration 10 10.0
LED Trouble Shooting Chart 11 11.0
Part Numbers & Options:
Part No. Description
SBS-H2 Hydrogen Gas Detector (Includes: Main Unit, (1) sensor & (1) 25ft cable)
H2-JB Junction Box, 4 11/16” X 4 11/16” Metal, with Knockouts
H2-SENSOR Additional/Replacement Hydrogen Gas Sensor with 25ft Cable
H2-100FT-CABLE Custom 100 Ft Cable and mA Converter (no sensor)
H2-CALKIT Field Calibration Kit for SBS-H2
E190399 110vac 3 Prong AC Cord, 10 Ft, 18AWG
Warnings:
This detector is added protection, not a substitute, for prudent safety measures where
hydrogen gas is present. For large or highly sensitive areas, you may have to use two or
more detectors with 1 or 2 sensors each for increased detection.
The hydrogen sensor does not provide protection from fires or hydrogen explosions.
The relay contacts are intended to be connected to a safety system, enabling audible
alarms, system shutdown, ventilation, or other measures to ensure safe handling and
use of hydrogen gas.
Ensure that your installation complies completely with all relevant local, State, Federal,
and OSHA safety and health regulations
If sensor responds, there is a risk of combustion or explosion. To avoid injury leave area
immediately.
The hydrogen sensor is calibrated for operation in air. Tampering with the sensor or
operation in other gas environments can lead to inaccurate readings and possible
permanent damage if operating in a reducing atmosphere or 100% hydrogen. The
hydrogen sensor is silicone resistant but uncured silicone compounds or extended
exposure to silicone off gassing, or high concentrations of refrigerant gasses related to a
leak, can give inaccurate readings in the sensor.
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SBS-H2 Users Manual Rev 1.4 January 6th 2013
1.0 Overview
Battery Size
Hydrogen Gas
12 Volt / 500 Amp-Hour
3.5 Cubic Feet/hr.
24 Volt / 720 Amp-Hour
10.1 Cubic Feet/hr.
36 Volt / 935 Amp-Hour
19.8 Cubic Feet/hr.
48 Volt / 850 Amp-Hour
23.9 Cubic Feet/hr.
Pre-March 2016 Version
Hydrogen gas detectors act as monitors that provide alarms as well as control functions
such as controlling exhaust fans, remote alarm and signaling, building management
interfacing and more for the protection of your facility.
Batteries on charge emit hydrogen gas after reaching 80% of the recharge point.
Examples of typical hydrogen emissions per lead-acid battery are:
Concentrations of 4.1% to 75% H2 mixed with air can be explosive. Sparks or hot surfaces
can ignite them. A 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%.
2.0 Benefits
In addition to protecting your employees and your property, the detector may also
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.
3.0 How it Works
Should the concentration of hydrogen gas in the air surrounding the sensor reach 1% by
volume, the "1% Warning" yellow LED will light and the 1% internal relay will energize. Should
the hydrogen gas concentration reach 2% by volume, the "2% Alarm" red LED will flash and an
alarm will sound.
Either relay can be used to activate a remote exhaust fan and/or alarm.
Automatic operation, continuous monitoring, high sensitivity & stability,and solid state reliability.
The unit is also intrinsically safe using 120/240 VAC 50/60 Hz or 12-48 VDC operating voltages,
low in cost and easy and versatile to install.
SBS-H2 Users Manual Rev 1.4 January 6th 2013
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4.0 Specifications
Pre-March 2016 Version
Dimensions:
4.75"L x 5.25"W x 1.4"D (display only)
Wall Mounting:
Two 3/16" screws
Junction Box Mounting:
Requires 4 11/16” x 4 11/16” 2-gang junction box (SBS Part# H2-JB)
Power Requirements:
120/220 VAC, 50 / 60 Hz or
12VDC Isolated or 14 to 48 VDC *** An earth ground must be supplied to the
GND terminal when using the 12VDC and Isolated (Gnd) inputs for 12 Volt
supply to the unit.
Relays:
1% Warning Relay, 1 Normally Open & 1 Normally Closed contact
2% Alarm Relay, 1 Normally Open and 1 Normally Closed contact
5.0 Sensor
The sensor consists of a ceramic sensing element whose electrical conductivity increases when
hydrogen is adsorbed on its surface. Conductivity of the sensor is proportional to the gas
concentration which is continuously monitored by an electronic circuit. The sensor only monitors
pure hydrogen gas (H2) and will not alarm due to Hydrogen Sulfide (H2S) – which has an odor
at very low concentrations.
Hydrogen Sensor 25 Ft Cable extension
SBS-H2 Users Manual Rev 1.4 January 6th 2013
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