Compact, robust, easy to use and with protection against combustion, the Tetra 3 is a must-have for detecting the presence of hazardous gasses in the workplace.
This version of the Tetra 3 is specially configured to detect the presence of four different gas types. It can detect CH4 (methane), O2 (and includes a 3 year sensor), HS2 (hydrogen sulphide) and CO (carbon monoxide).
When gas presence is detected the Crowcon Tetra 3 alerts the user in 3 ways. It will quickly begin to vibrate, will shine dual flashing LED indicators and will also emit a loud audible tone whenever gas is found, allowing the user to evacuate or take action immediately before gas concentration becomes particularly hazardous.
As well as alerting the user to the presence of gasses the Tetra 3 also has a top-mounted display that makes it easy to view direct measurements of gas concentration simply by looking down at the meter when it's clipped onto your clothing via the included clip.
Please note that the Crowcon Tetra 3 has been classified with ATEX II 2G EEx iad IIC T4 (tamb -20°C to +55°C) and BASEEFA05ATEX0187 ratings for Europe, international IECEx Ex iad IIC T4 (Tamb -20 to +55°C) and BAS05.0059 for international and Class I Division 1 Groups A, B, C, D pending for use in the USA. If you're working in a combustible environment, please check that this detector is suitable for use before you use it in the area.
Weight | 269g | ||
Dimensions | 112 x 72 x 49mm (tapers to 20mm) 4.4 x 2.8 x 1.9" |
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Gas | Range | Alarm UK/ROW | Alarm USA |
Flammable | 0-100% LEL | 20% LEL | 10% LEL |
Oxygen | 0-25% | 19/23.5% | 19.5/23.5% |
Hydrogen Sulphide | 0-50ppm | 5ppm | 10ppm |
Carbon Monoxide | 0-500ppm | 30ppm | 35ppm |
Typical Response Times | Flammable 20s, Toxic Gas 30s, Oxygen 10s | ||
Audible Alarms | 95dBa Multiple alarm sounds allow selection of distinctive tones for different alarm levels |
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Visible Alarms | Dual colour red/blue flashing LED pairs in gas hazard | ||
Vibrating Alarm | Internal vibrating alarm | ||
Display | Graphic LCD with backlight, giving simultaneous display for all gas channels. Graphic symbols for battery (with proportional indication of remaining operation time), healthy operation or fault warning. Start up indication when calibration is due within 30 days, calibration overdue or service required |
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Display Mode | Normal display for real time gas concentration levels. Display recall for peak readings and TWA |
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Battery | Rechargeable Li-Ion | ||
Operating Time | Based on four gas unit with flammable sensor > 16 hours | ||
Sampling | Diffusion or hand aspirator | ||
Operating Temp Range | -20 to +55°C (-4 to 131°F) | ||
Humidity | 0-99% RH | ||
Ingress Protection | IP65 and IP67 | ||
Approval Codes: Europe | ATEX II 2G EEx iad IIC T4 (tamb -20 to 55°C) BASEEFA05AATEX0187 |
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Approval Codes: International | IECEx Ex iad IIC T4 (tamb -20 to +55°C) BAS05.0059 |
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Approval Codes: USA | Class I Division 1 Groups A, B, C, D pending | ||
Safety Standards: Europe | EN50014, EN50020, EN50018, 94/9/EC | ||
Safety Standards: USA & Canada | UL913, CSA22.2, 152 | ||
Operation Standards | EN50270, EN50271, IEC61508, EN61779 |