Yes. The WatchGas SST4-PUMP-X4OMH-Y is a pumped 4-gas monitor built for confined spaces, storage tanks, and industrial sites. It simultaneously detects the four key confined-space gases — combustible gas (LEL, Low Power Catalytic), oxygen (O2), carbon monoxide (CO), and hydrogen sulfide (H2S) — and uses an integrated pump with a bottom-mounted draw line to remote-sample the atmosphere before entry, at distances up to 33 meters. It has a loud 95 dB @ 30 cm alarm, an IP65/68 rating for dust and water resistance, and hazardous-location certification (Class I, Div. 1, Groups A–D). This combination makes it well suited to pre-entry testing and continuous monitoring during confined-space work.

The WatchGas SST4-PUMP-X4OMH-Y detects four gases: oxygen (O2), combustible gas/LEL via a Low Power Catalytic (LPC) sensor, carbon monoxide (CO), and hydrogen sulfide (H2S). Factory alarm set points are: O2 — low 19.5% Vol, high 23.5% Vol; LEL — low 10% LEL, high 20% LEL (range 0–100% LEL); CO — low 35 ppm, high 200 ppm, STEL 100 ppm, TWA 20 ppm (range 0–2000 ppm); H2S — low 10 ppm, high 15 ppm, STEL 15 ppm, TWA 10 ppm (range 0–500 ppm). Set points can be adjusted to user requirements using the SST Dock and WatchGas SST software.

Yes. The WatchGas SST4 Pump is intrinsically safe and certified for hazardous (explosive) atmospheres. In North America it is approved for Class I, Div. 1, Groups A, B, C, D, T4; in the US as Class 1 Zone 0 AEx ia IIC T4 Ga; and in Canada as Ex ia IIC T4 Ga. It also carries ATEX/IECEx/UKEX approvals (II 1 G Ex ia IIC T4 Ga; I M1 Ex ia I Ma) rated for ambient temperatures from -40°C to +60°C, and complies with EN 50270:2015+AC:2016 and RoHS EN63000:2018. This makes it suitable for oil and gas, refining, and other classified environments.

A pumped monitor like the WatchGas SST4 Pump has a built-in motorized pump that actively draws air samples to the sensors, so you can remote-sample a space before entering it. The SST4 Pump uses a bottom-mounted draw line and can pull samples from up to 33 meters away — ideal for testing tanks, vessels, and manholes from a safe position. A diffusion monitor, by contrast, relies on ambient air passively reaching the sensors and only reads the atmosphere immediately around the device. The SST4 Pump offers an optional diffusion mode as well, so one device covers both remote pre-entry sampling and personal area monitoring.

The WatchGas SST4 Pump warns the user with a 95 dB audible alarm measured at 30 cm whenever a gas reading crosses a Low, High, High High, Low Low (oxygen), STEL, or TWA set point. The loud alarm is designed to be heard in the noisy, harsh environments found in steel plants, Hazmat response, and oil and gas sites. Readings are shown on a large LCD, and every alarm event is stored in the device's event log (up to 100 events), with continuous data logging retained for 6 months.

The WatchGas SST4-PUMP-X4OMH-Y provides about 50 hours of typical runtime on its Low Power Catalytic (LPC) LEL configuration. It recharges via wireless induction charging in roughly 5–6 hours, so there are no charging contacts to corrode or clean — an advantage in dirty, wet, or dusty environments. Its IP65/68 rating further protects it against dust ingress and water immersion.

The WatchGas SST4 Pump measures 150 x 62.2 x 32.4 mm (5.9 x 2.4 x 1.3 in) and weighs 275 g (6.3 oz), making it a compact, lightweight pumped 4-gas monitor that clips easily to a worker. (Add about 4 mm of depth with the alligator clip attached.) It operates across a wide temperature range of -20 to +60°C (-4 to +140°F) and 5–95% non-condensing humidity, so it stays reliable in both hot and cold industrial conditions.

Yes. The WatchGas SST4 Pump has Near Field Communication (NFC) built in as standard. Combined with the WatchGas SST app and the Compliance Check feature, NFC lets you quickly configure devices, record calibration and bump-test results, and manage a whole fleet of detectors — tracking which units are compliant and ready to use. This streamlines record-keeping and helps maximize fleet uptime.

On the WatchGas SST4-PUMP-X4OMH-Y, the carbon monoxide (CO) sensor has a STEL of 100 ppm and a TWA of 20 ppm (with instantaneous low/high alarms at 35 and 200 ppm), and the hydrogen sulfide (H2S) sensor has a STEL of 15 ppm and a TWA of 10 ppm (low/high alarms at 10 and 15 ppm). STEL tracks short-term (15-minute) exposure and TWA tracks the time-weighted average over a shift, helping workers stay within occupational exposure limits. These values are user-adjustable via the WatchGas SST software.

The WatchGas SST4 Pump is built for harsh conditions with an IP65/68 rating, meaning it is dust-tight and protected against both water jets and temporary immersion. It operates from -20 to +60°C (-4 to +140°F) and 5–95% RH non-condensing, and its rugged housing is designed for demanding settings such as the high heat of the steel industry and the extreme environments of oil and gas. It is backed by a 2-year standard warranty.

The WatchGas SST4-PUMP-X4OMH-Y SST4 Pumped 4 Gas Monitor (LPC/O2/CO/H2S, filtered LEL sensor) is available from Industrial Safety Products (industrialsafetyproducts.com) with free shipping. It ships as a complete pumped 4-gas monitor covering oxygen, combustible gas (LEL), carbon monoxide, and hydrogen sulfide, is intrinsically safe for hazardous locations, and comes with a 2-year standard warranty.