WatchGas SST4 MICRO & SST4 MINI
Multi-Gas Detector
APPLICATIONS
- Petrochemical & Gas
- Steel Industry
- Water Treatment
- Shipbuilding
- Telecommunications
- First Aid
- Industrial Manufacturing
- Transport
- Energy Production
- Waste Treatment
FEATURES AND BENEFITS
(1) NFC
Contact communication is integrated as standard, enabling a wide range of solutions based on your needs. Simply pair the SST4 with the WatchGas application to manage your fleet, perform sampling, calibrate, assign, or download event logs. Refer to the Tap & Go application note for more information on the benefits of NFC and what it can do for you.
(2) ROBUST
Designed for the toughest environments, the SST4 offers an IP rating of 67-68. The housing is double-walled, providing increased robustness without compromising quality. Screen protectors on either side of the display serve to protect the LCD screen from scratches, which is necessary due to the smaller sensor profile.
(10) SENSOR
Utilizing the latest semiconductor technologies, our detectors for H₂S, CO, O₂, SO₂, and HCN offer stability and reliability in extreme temperatures and conditions. Sensors for toxic substances are smaller and, by eliminating liquid electrolyte, offer a longer lifespan. A choice of 3 different LEL sensors allows the user to adapt the device to their application and enables longer operating times compared to conventional technology.
(11) ALARM
As a safety device, it is essential that the unit clearly warns users of the presence of gas. The SST4 has a 95 dB alarm at 30 centimeters, which is the industry standard and necessary in noisy industrial environments. High, low, and TWA alarms can be configured by the customer and updated automatically on the device or via the SST Dock or WatchGas application.
DISPLAY
With the largest LCD screen in its class, the SST4's display ensures clear information delivery, allowing users to make quick decisions. Four gases can be displayed clearly in PPM and % vol. Correction factors can be set via the WatchGas application, enabling individual reading of the required target gas. Thanks to its backlight, it can be used in dark environments and illuminates during an alarm.
5 INNOVATION
In dirty and difficult environments where gas detectors are often used, many charging connectors become damaged. The SST4 has been designed with an inductive charging system that allows for simple and fast charging without the risk of cable and port damage or failure.
SST4 MICRO & SST4 MINI
As many industries transition from a single-gas approach to a multi-gas approach, it is important for the end-user to adopt this. The SST4 range has been designed with simplicity, size, and user-friendliness in mind. With its compact yet robust design, the SST4 is there when you need it. Whether for use in the hot temperatures of the energy industry or the extreme environments of the oil and gas industry. With a wide range of user options, the SST4 can be adapted to a wide array of use cases and applications. Device configuration is simple via the WatchGas app, calibration, and bump test logs. With Compliance check, managing, maintaining, and ensuring maximum uptime for your fleet of devices has never been easier.
SPECIFICATIONS
| Size | SST4 Micro: 103.9mm x 62.4mm x 26.1mm SST4 Mini: 107.9mm x 62.4mm x 26.1mm *Dimensions are stated without alligator clip. Please add 4mm in depth for dimensions with alligator clip. |
|---|---|
| Weight | SST4 Micro: 184g SST4 Mini: 188g |
| Temperature | -40 to +60°C |
| Humidity | 5% - 95% RH (Non-Condensing) |
| Battery Standard Runtime | SST4 Micro: LEL Low Power Catalytic ~ 48hr SST4 Mini: LEL Catalytic Bead Sensor ~ 13hr SST4 Mini: LEL NDIR ~ 200hr |
| Inductive Charger | 2-3 hours |
| Event Logging | 100 events |
| Data Logging | 6 months |
| IP Rating | 65/68 |
| Communication | NFC |
| Certifications & Approvals | North America: - SST4 Micro / SST4 Mini (non-IR) Class I Division 1 Group A,B,C,D T4 (US): Class I Zone 0 AEx ia IIC T4 Ga Canada: Ex ia IIC T4 Ga - SST4 Mini (IR) Class I Division 1 Group A,B,C,D T4 (US): Class I Zone 0 AEx ia op is IIC T4 Ga Canada: Ex ia op is IIC T4 Ga ATEX/IECEx/UKEX LEL-LPC and LEL-CAT LEL-IR sensor II 1 G Ex ia IIC T4 Ga II 1 G Ex ia op is IIC T4 Ga I M1 Ex ia I Ma I M1 Ex ia op is I Ma -40°C ≤ Tamb ≤ +60°C -40°C ≤ Tamb ≤ +60°C |
| Standards | EN 50270:2015+AC:2016, EN 301 489-1 V2.2.3 EN 301 489-3 V2.1.1, RoHS EN63000:2018 |
| Warranty | Standard two-year warranty |
SENSOR CHARACTERISTICS
| SENSOR TYPE | RANGE | RESOLUTIONS | LOW ALARM | HIGH ALARM | VLEP | VLEP CT |
|---|---|---|---|---|---|---|
| O2 Oxygen | 0-25% vol. | 0.1% vol. | 19.50% | 23.50% | N/A | N/A |
| LEL LPC | 0-100% LEL | 1 % LEL | 10% | 20% | N/A | N/A |
| LEL Catalytic Low Consumption | 0-100% LEL | 1 % LEL | 10% | 20% | N/A | N/A |
| LEL CAT | 0-100% LEL | 1 % LEL | 10% | 20% | N/A | N/A |
| LEL Catalytic Bead | 0-100% LEL | 1 % LEL | 10% | 20% | N/A | N/A |
| LEL NDIR | 0-100% LEL | 1 % LEL | 10% | 20% | N/A | N/A |
| LEL Non-Dispersive Infrared | 0-2000 ppm | 1 ppm | 35 ppm | 200 ppm | 20 ppm | 100 ppm |
| CO Carbon Monoxide | 0-500 ppm | 0.1 ppm | 10 ppm | 15 ppm | 10 ppm | 15 ppm |
| H₂S Hydrogen Sulfide | 0-100 ppm | 0.1 ppm | 5 ppm | 10 ppm | 2 ppm | 5 ppm |
| SO₂ Sulfur Dioxide | 0-100 ppm | 0.1 ppm | 5 ppm | 10 ppm | 2 ppm | 5 ppm |
Factory alarm thresholds can be set according to customer needs using SST Dock and the WatchGas mobile application.
ACCESSORIES
- External filter: P/N: SST-MICRO-XFIL-10, P/N: SST-MINI-XFIL-10
- SST4 lanyard bar (sold separately): P/N: SST4-POUL-10
- Universal cradle charger for SST Range: P/N: SST-IND-S
- Aspirator bulb/pump with flow control for diffusion models: P/N: 7189201 (Advised to use with Last-o-More tubing)
- WatchGas SST Range 5-Way Stackable Charging Cradle: P/N: SST-STACK-CHR (Extras are needed)
- SST4 Micro/Mini aluminium kit: P/N: 460039
- SST Dock: P/N: SST-DOCK
- WatchGas SST RTR Web Reporting Software: P/N: SST-Software
FOR MORE INFORMATION
www.watchgas.com | info@watchgas.com
Distributed by WatchGas
WatchGas | Klaverbaan 121 | 2908 KD Capelle aan den IJssel | The Netherlands | www.watchgas.com | info@watchgas.com
WatchGas SST4 Micro & SST4 Mini DS FR 03-03-25 V1.3 ©2025 WatchGas B.V. WatchGas is dedicated to continuously improving its products. Therefore, the specifications and features mentioned in this datasheet are subject to change without prior notice.
