SKU: WG01-SST1-H2

WatchGas SST1 Serviceable H2 Gas Detector SST1-H2

$420.00

Ships in 2 - 3 weeks

Description

Hydrogen has no smell, no color, and no toxic exposure limit. Which is exactly why workers in battery rooms, hydrogen refueling stations, fuel cell manufacturing, and refinery hydrotreating rely entirely on continuous monitoring — there's no sensory backup, and no OSHA PEL to signal "over exposure."

Hydrogen isn't like the other gases you monitor. It doesn't have a toxicity story: OSHA has no permissible exposure limit for H2, and there's no smell or color to tell you a leak is present. What hydrogen does have is a wide flammability range (4% to 74% by volume in air) and an extremely low ignition energy — static electricity or a hot surface can be enough. Add to that the fact that H2 is the smallest molecule in existence: it diffuses through joints, gaskets, and small cracks faster than any other gas, and it rises quickly, accumulating near ceilings and in enclosed roof spaces.

Without a continuous instrument, there's no way to know a leak is present until it either ignites or displaces enough oxygen to cause asphyxiation. The monitor is the safety system.

The WatchGas SST1-H2 Serviceable Hydrogen Gas Detector gives you a number instead of a nose — in an environment where the nose can't help.

It reads hydrogen continuously in ppm across a 0–1000 ppm range — the "H2 Low Range" configuration designed for early leak detection well below the flammability limit. Hydrogen's LEL (lower explosive limit) is 4%, which is 40,000 ppm. The SST1-H2's default alarms of Low 100 ppm and High 400 ppm sit at 0.25% and 1% of LEL respectively — deep in the safe zone, giving your team time to investigate, ventilate, and shut down before a leak approaches any flammability concern. Configurable low, high, TWA, and STEL alarms let you tune the monitor to your facility's specific safety program.

Why battery-room operators, fuel cell manufacturers, and refinery safety engineers pick the SST1 line for hydrogen monitoring:

Continuous H2 monitoring in ppm with configurable Low, High, TWA, and STEL alarms
0–1000 ppm early-warning range — designed for detecting leaks well below the 4% LEL, not for high-concentration monitoring
Serviceable sensor — replace the H2 sensor cell instead of the whole unit at end-of-life
3-year instrument warranty (vs. the industry-typical 2 years); 2-year sensor warranty (H2 sensor chemistry is more stable than mercaptan or phosphine sensors, so the sensor lasts longer)
3-year replaceable battery based on typical alarm exposure
Solid polymer sensor technology — compact, robust, temperature-tolerant
NFC configuration and WatchGas App integration for datalogging
Vibration + audible + visual alarms — you notice it in a battery room or a refinery process area
Bump test and calibration compatible with the WatchGas SST-DOCK; compliance check-in compatible with the WatchGas SST-KIOSK

Sensor and alarm specifications:

Sensor	Gas measuring range	Low alarm (default)	High alarm (default)
H2 (Low Range)	0 – 1000 ppm	100 ppm (0.25% of LEL)	400 ppm (1% of LEL)

PK Safety services the full WatchGas SST line with factory-trained technicians in-house. We also handle BW/Honeywell (Factory Authorized Service Center), RKI, and RAE Systems monitors — one shop for a mixed-brand fleet. When the H2 sensor drifts or needs replacement, send the unit to us. Call us at 800.829.9580 to talk through your hydrogen monitoring workflow — battery room, refueling station, fuel cell facility, or refinery — with someone who understands the SST1 platform.

This is right for you if:

You manage a battery room — lead-acid charging areas produce H2 gas during recharge cycles (many state and local electrical codes require continuous H2 monitoring); Li-ion outgassing in thermal runaway conditions also includes H2
You operate a hydrogen refueling station or run a fleet of H2 fuel cell vehicles
You work in fuel cell manufacturing — transportation, stationary power, or backup power applications
You supervise petroleum refining operations — hydrotreating units, hydrocracking, hydrogen recovery, sulfur recovery
You run ammonia synthesis (Haber-Bosch), methanol production, or chemical hydrogenation processes
You work in semiconductor manufacturing where H2 is used as a reducing atmosphere for CVD, epitaxial growth, or wafer processing
You handle aerospace propellants or rocket-fuel operations
You're building out green hydrogen electrolysis, storage, or transport infrastructure
You need continuous hydrogen leak-detection logs for OSHA respiratory protection, flammable gas atmosphere compliance (29 CFR 1910.106), NFPA 2 (Hydrogen Technologies Code), or internal safety audits

Technical documents:

Brochure

Specification Sheet

Quick Start Guide

Part Number: WG01-SST1-H2 — SST1-H2 Serviceable Hydrogen (H2) Gas Detector, 0–1000 ppm range, real-time display

Frequently Asked Questions

Does OSHA have an exposure limit for hydrogen?

No. OSHA does not set a permissible exposure limit (PEL) for hydrogen, because H2 is classified as a simple asphyxiant (it displaces oxygen at high concentrations) and a flammability hazard — not a toxicity hazard in the same sense as H2S, CO, SO2, or other regulated gases.

That makes the monitoring story different from other single-gas monitors: the alarm setpoint isn't "you're over the toxic exposure limit" — it's "there's a leak accumulating toward the flammability lower limit." Hydrogen's LEL is 4% (40,000 ppm). The SST1-H2's default Low 100 ppm alarm sits at 0.25% of LEL, and the High 400 ppm alarm sits at 1% of LEL — both are conservative early warnings well before any flammability concern. Configurable setpoints let you tune to your facility's specific safety program (which may reference NFPA 2, OSHA 1910.106, local electrical codes, or an internal standard).

Where is hydrogen monitoring typically required?

Hydrogen monitoring is a compliance or best-practice requirement across a growing set of environments: battery rooms (lead-acid charging produces H2 during recharge cycles — required by many state and local electrical codes; Li-ion thermal runaway also releases H2), hydrogen refueling stations and H2 fuel cell vehicle operations, fuel cell manufacturing (transportation, stationary, backup power), petroleum refining (hydrotreating, hydrocracking, hydrogen recovery units, sulfur recovery), ammonia synthesis via Haber-Bosch, methanol production and chemical hydrogenation, semiconductor manufacturing (H2 as reducing atmosphere), aerospace and rocket propellant handling, and emerging green hydrogen production via electrolysis.

Common regulatory references: 29 CFR 1910.146 (confined space), 29 CFR 1910.106 (flammable liquid handling), NFPA 2 Hydrogen Technologies Code, IFC and IBC hydrogen-specific chapters, and local electrical codes for battery rooms.

Why can't I detect hydrogen by smell?

Hydrogen is completely undetectable by human senses — no smell, no color, no taste. Unlike natural gas (which has methanethiol added as an odorant), industrial hydrogen typically has no odorant. Some hydrogen produced from certain feedstocks may have trace impurities that impart a faint odor, but this is unreliable and impurity-dependent.

Hydrogen also diffuses very rapidly — it's the smallest molecule in existence, and it moves through joints, gaskets, and small cracks faster than any other gas. It rises quickly in still air and tends to accumulate near ceilings and in enclosed overhead spaces. Without a continuous instrument, there's no reliable way to know a leak is present until it either ignites or displaces enough oxygen to cause asphyxiation. The monitor is the safety system.

What is the SST1-H2's measuring range designed for?

The SST1-H2 measures hydrogen in the 0–1000 ppm range — what WatchGas designates the "H2 Low Range" configuration. That range is designed for early leak detection well below the flammability limit. Hydrogen's LEL is 4% (40,000 ppm), so the SST1-H2's Low alarm at 100 ppm sits at 0.25% of LEL, and the High alarm at 400 ppm sits at 1% of LEL. Both are conservative early-warning setpoints, well before any accumulation approaches flammability.

This makes the SST1-H2 suitable for battery rooms, fuel cell facilities, refinery process areas, and any environment where the safety objective is preventing accumulation of an H2 leak. It is NOT designed for detecting high-concentration hydrogen atmospheres (which would require a %LEL-range monitor and typically SCBA-equipped entry procedures).

What does "serviceable" mean on the SST1-H2?

Traditional single-gas monitors are single-use — when the sensor reaches end-of-life, the whole unit gets replaced. The SST1 platform is designed to be serviced: the hydrogen sensor cell can be replaced, extending the monitor's service life beyond the sensor's own lifespan. Instrument warranty is 3 years; sensor warranty is 2 years (H2 sensor chemistry is more stable than mercaptan or phosphine sensors, so the sensor lasts longer between replacements). PK Safety services the WatchGas SST line in-house.

Does the SST1-H2 work with the WatchGas SST-DOCK and SST-KIOSK?

Yes to both. The SST1-H2 is fully compatible with the WatchGas SST-DOCK Touchscreen docking station for automatic bump testing, calibration, and datalogging (about 60 seconds per unit), and with the WatchGas SST-KIOSK compliance kiosk for fleet-level compliance check-in.

If you're running a fleet of SST1-H2 monitors across a battery-room network, a hydrogen refueling operation, or a refinery hydrogen system, the SST-DOCK + SST-KIOSK combination covers your bump/cal workflow and your compliance-tracking workflow together.

Not sure this is the right fit for your workflow? Call PK Safety at 800.829.9580. A person who knows hydrogen monitoring and the WatchGas SST platform will pick up.