 
			High accuracy: The latest sensor technology guarantees accurate measurement of hazardous gas concentrations. Durability: IP67–68 protection ensures resistance to dust and water, so the device works reliably even in extreme conditions. Long battery life: Inductive charger allows for quick and convenient charging.
High accuracy: The latest sensor technology guarantees accurate measurement of hazardous gas concentrations. Durability: IP67–68 protection ensures resistance to dust and water, so the device works reliably even in extreme conditions. Long battery life: Inductive charger allows for quick and convenient charging. Wide range of applications: Detects a wide range of gases, including H₂S, CO, O₂ and others.
Industrial enterprises: Steel mills, petrochemical plants, energy, maintenance. Firefighters and rescue workers: For rapid detection of hazardous gases during emergency operations. Workers in risky professions: Where there is a risk of leakage of hazardous substances.
Reliability: Proven quality and long service life. Safety: Protects the health and life of workers. Efficiency: Increases productivity and reduces the risk of accidents.
| Brand: | Watchgas SST4 | 
| Category: | Measurement and control / Gas measurement / Portable detectors | 
| Dimensions | 108 mm x 62 mm x 26 mm | 
| Weight | 188 g | 
| Audible alarm | 95 dB | 
| Vibrating alarm | Yes | 
| Visual alarm | LED | 
| Datalogging | 6 months of data and last 100 events | 
| Battery | Rechargeable Li-ion battery – typical operation 13 hours (cat. sensor); charging 3 hours | 
| Operating temperature | –40 to +60°C | 
| Humidity | 5–95% RH non-condensing | 
| Ingress protection | Independently tested for IP65 and IP68 | 
| Compliance (EMC) | Directive 2014/30/EU | 
| ATEX certificate (G) | II 1 G Ex ia IIC T4 Ga Tamb –40°C to +60°C (when using NDIR sensor II 1 G Ex ia op is IIC T4 Ga) | 
| ATEX certificate (M) | I M1 Ex ia I Ma Tamb –40°C to +60°C (when using NDIR sensor I M1 Ex ia op is I Ma) | 
| Included accessories | Travel inductive charger with USB-C connector | 
| Optional accessories | Single-channel charging cradle, stackable 5-channel charger, clip-on dust filter, verification and calibration station SST-DOCK | 
| Oxygen | 0–25% vol. (resolution 0.1% vol.) | 
| Flammable gases – catalytic | 0–100% DMV (resolution 1% DMV) | 
| Flammable gases – NDIR | 0–100% DMV (resolution 1% DMV) | 
| Sulfan | 0–500 ppm (resolution 0.1 ppm) | 
| Carbon monoxide | 0–2000 ppm (resolution 1 ppm) | 
| Sulfur dioxide | 0–100 ppm (resolution 0.1 ppm) | 
| Detector type | Vícekanálový | 
| Sampling | Difúzní | 
| Certificate | ATEX | 
| IP | 68 | 
| Detector power | Akumulátory | 
| Data logging | Paměť pro ukládání dat |