Yes. The WatchGas SST1 Single Gas H2S detector is a compact, maintenance-free personal monitor built to track hydrogen sulfide (H2S) in oil & gas, wastewater, refineries, plant turnarounds, contracting, and rental fleets — the environments where this toxic, "knock-down" gas is a common hazard. It measures H2S from 0 to 500 ppm and alarms early, with a default low alarm at 10 ppm and high alarm at 15 ppm. It runs continuously 24/7 for 2 years with no calibration, no charging, and no battery or sensor replacement — you activate it and wear it. It sounds a 95 dB alarm at 30 cm, is intrinsically safe for hazardous areas (ATEX/IECEx/UKEX Ex ia IIC T4 and North America Class I, Div 1, Groups A–D), and weighs just 88 g so it's easy to clip on all shift.

The WatchGas SST1-H-24 detects hydrogen sulfide (H2S) over a measuring range of 0–500 ppm with 0.1 ppm resolution. Its default alarm setpoints are a low alarm at 10 ppm and a high alarm at 15 ppm; these levels can be adjusted using the WatchGas Device Link App or the SST Dock. It reaches T90 response in under 10 seconds and logs the last 100 events for compliance records.

No. The WatchGas SST1 is a maintenance-free, fixed-life detector — no calibration, no charging, no battery replacement, and no sensor replacement for its entire 2-year service life. You simply activate it and it runs continuously 24/7. This eliminates downtime and is ideal for contractors, equipment rentals, and turnarounds. To simplify compliance, it still supports fast bump testing on the optional SST Dock.

Yes. The WatchGas SST1 is intrinsically safe and certified for use in explosive/hazardous atmospheres. It carries ATEX, IECEx and UKEX approval (II 1 G Ex ia IIC T4 Ga) and North American Intrinsically Safe approval for Class I, Division 1, Groups A, B, C, D (T4), and is built to UL 61010-1 and CAN/CSA-C22.2 No. 61010-1 plus the UL/CSA 60079 series. It is also ABS Type Approved for marine use and meets the EMC Directive 2014/30/EU.

The WatchGas SST1-H-24 is a 2-year fixed-life device: once activated it runs continuously for 2 years, then is retired and replaced. (The H2S sensor is also offered in a 3-year life on a separate model; this SKU is the 2-year version.) Before activation it has a 1-year shelf life. The warranty covers the 1-year shelf life plus the 2-year run time from the activation date. When the life ends there is nothing to service — you swap in a new unit, which keeps the total cost of ownership predictable.

You bump test the WatchGas SST1 using the optional SST Dock, a universal docking station that WatchGas says enables the fastest bump testing on the market for effortless fleet management. The SST1 communicates via NFC (Tap&Go), so results and settings sync through the SST Dock, the Compliance Kiosk, or the WatchGas Device Link App. The detector itself needs no calibration during its fixed life; bump testing simply verifies sensor and alarm response for compliance.

Very. The WatchGas SST1 weighs just 88 g (3.1 oz) and measures 83 × 49 × 20 mm (3.3 × 1.9 × 0.8 in), making it one of the smallest, lightest single-gas monitors to clip on and wear. It's rugged and IP68-rated against dust and water, operates across an extreme -40 to +60 °C (-40 to +140 °F) range, and features a large, easy-to-read LCD. It's designed to stay reliable in the harshest job-site conditions.

For low total cost of ownership, yes. Unlike detectors that need calibration, charging, and periodic sensor swaps, the WatchGas SST1 is a maintenance-free fixed-life unit: activate it and it runs 24/7 for 2 years with zero servicing, then you replace it. That removes calibration labor, test-gas overhead, charging time, and downtime — a predictable, all-in cost that's especially attractive for contractors, rental fleets, and plant turnarounds. It's also part of the wider WatchGas SST ecosystem (SST Dock, Compliance Kiosk, RTR reporting software) if you later want fleet data and reporting.

The WatchGas SST1 Single Gas H2S 0-500ppm 2 Year Fixed Life (SKU SST1-H-24) is available from Industrial Safety Products (industrialsafetyproducts.com) with free shipping. It's a single-gas hydrogen sulfide monitor sold as a ready-to-activate, maintenance-free unit.

The WatchGas SST1 uses NFC (near-field communication) for Tap&Go data transfer and stores the last 100 events in its onboard log. Tapping the detector to the WatchGas Device Link App, the Compliance Kiosk, or the SST Dock reads its event history and lets you configure alarm setpoints. For full fleet visibility, the optional WatchGas RTR web reporting software turns that data into compliance records and proactive reporting across sites.