Gas detection3
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Technical rescue9
Firefighting4
Safety & environment4
Personal protective equipment2
WatchGas SST4 Micro / Mini — 4-gas detector (Solid State, IP65/68)
The WatchGas SST4 is a compact detector for up to 4 gases (LEL, O₂, H₂S, CO and options) in two housing variants — Micro and Mini. It stands out with Solid State sensor technology for toxic gases (no liquid electrolyte — greater durability and robustness) and a choice of combustible-gas sensor: low-power catalytic (LPC), high-power (HPC) or NDIR infrared (up to 200 h of operation). Inductive charging, NFC connectivity with the WatchGas app, high IP65/68 protection and a loud 95 dB alarm. The sensors are serviceable (reusable device, 2-year warranty).
The WatchGas SST4 is a compact detector for up to 4 gases (LEL, O₂, H₂S, CO and options) in two housing variants — Micro and Mini. It stands out with Solid State sensor technology for toxic gases (no liquid electrolyte — greater durability and resistance) and a choice of flammable-gas sensor: low-power catalytic (LPC), high-power (HPC) or NDIR infrared (up to 200 h of operation). Inductive charging, NFC connectivity with the WatchGas app, a high IP65/68 protection rating and a loud 95 dB alarm. The sensors are serviceable (reusable device, 2-year warranty).
Note: The Micro and Mini differ in size and the available LEL sensor: Micro — LEL LPC (up to 48 h of operation); Mini — LEL HPC (13 h) or NDIR/IR (up to 200 h). The measured gases are configuration options — selected when ordering.
Key features
- Up to 4 gases: LEL, O₂, H₂S, CO (and SO₂) — configured when ordering.
- Solid State sensors for toxic gases — durable, with no liquid electrolyte.
- LEL sensor of choice: LPC (Micro, up to 48 h), HPC (Mini, 13 h) or NDIR/IR (Mini, up to 200 h).
- Inductive charging (full in 2–3 h); NFC connectivity + WatchGas SST app.
- 95 dB audible alarm @ 30 cm, visual (backlit LCD) and vibrating; High/Low/TWA/STEL.
- IP65/68 protection rating; double-shot housing; range −40…+60°C.
- SST Dock station — quick bump test and calibration; log of 100 events, 6-month data log.
Technical specifications
| Parameter | Value |
|---|---|
| Type | 1–4 gas detector (Micro / Mini) |
| Measured gases | O₂ 0–25% vol · LEL 0–100% · CO 0–2000 ppm · H₂S 0–500 ppm · SO₂ 0–100 ppm |
| Sensor technology | Solid State (toxic, O₂); LEL: catalytic LPC/HPC or NDIR |
| Sampling | diffusion (optional aspirator bulb) |
| Power supply / operating time | battery, inductive charging; Micro LPC 48 h, Mini HPC 13 h, Mini NDIR up to 200 h |
| Dimensions / weight | Micro 104 × 62 × 26 mm (184 g) / Mini 108 × 62 × 26 mm (188 g) |
| Protection rating | IP65/68 |
| Alarms | 95 dB @ 30 cm, visual, vibrating; High/Low/TWA/STEL |
| Connectivity | NFC + WatchGas SST app |
| Approvals | ATEX/IECEx/UKEX Ex ia IIC T4 Ga; Class I Div 1; ABS |
| Calibration / bump test | SST Dock station; inductive chargers |
Applications
Confined spaces, petrochemicals, wastewater treatment plants, mining, construction, rescue services, maintenance.
Frequently asked questions (FAQ)
How many gases does the WatchGas SST4 measure?
Up to 4 simultaneously: flammable gases (LEL), oxygen, H₂S and CO (and SO₂). The configuration is selected when ordering.
How does the Micro differ from the Mini?
In size and the flammable-gas sensor: the Micro has an LEL LPC (up to 48 h of operation), the Mini — LEL HPC (13 h) or an NDIR/IR version with up to 200 h of operation.
What are Solid State sensors?
These are sensors with no liquid electrolyte — more durable and resistant than classic electrochemical ones; in the SST4 they measure toxic gases and oxygen.
Brand & service
WatchGas — SafeTech is a distributor and service station: sensor selection, calibration, bump tests and service (WatchGas Mono/Multi Dock docking stations).
Why SafeTech
- 23 years of experience in gas detection (the company has been operating since 2003).
- Authorised distributor and authorised service station (including Honeywell, Bieler+Lang).
- In-house service, calibration, certification and adjustment in Suchy Dwór near Gdynia — support throughout Poland.
- Training and technical support (SafeTech Safety Academy).
Availability & service — Gdynia and Tricity
WatchGas SST4 Micro / Mini — 4-gas detector (Solid State, IP65/68) — sales, selection, calibration and service in Gdynia (Suchy Dwór, on the border of Gdynia and the Kosakowo municipality). We serve the Tricity area (Gdańsk, Sopot, Gdynia), Rumia, Reda, Wejherowo, the Pomerania province and all of Poland. Ask about our offer and availability.
Accessories and compatible equipment
- Calibration & bump test: stacja WatchGas SST Dock, calibration gas mixtures, regulators and pressure-reducing valves for cylinders.
- Sensors & filters: replacement sensors matched to the measured gas, dust and hydrophobic filters.
- Sampling: probe, hose, aspirator bulb (for diffusion versions).
- Carrying & protection: lanyard, clip, holder, transport case, charger/power supply.
Full selection of accessories and parts for this model — request a quote.
