Crowcon Tetra Gas Detector – Hazardous Area Gas Detection ATEX
Crowcon Tetra – Hazardous Area Gas Detection ATEX – call T&D Sales for price, delivery and stock.
Portable MultiGAS DETECTORS
CROWCON Tetra
Crowcon Tetra | ATEX Zone 1 & Zone 2 Hazardous Areas & Explosive Atmospheres
Obsolete | This gas detection product has now been made obsolete by Crowcon – view complete range of available gas detectors. Suggested replacements are Crowcon Tetra 3 & Crowcon T4.
The Crowcon Tetra is a portable gas detector which can measure up to four gases including flammable gases, oxygen and a wide range of toxic gases – ATEX certified for the safe detection of flammable gases in hazardous area locations, including Zone 1 and Zone 2.
The Crowcon Tetra is intrinsically safe and is the only Crowcon gas detector designed to meet IEC 61508-3 requirements guaranteeing reliable performance.
Crowcon Tetra is available with or without an internal pump and has a rechargeable and disposable option making this gas detector widely used in the utility, chemical and hydrocarbon processing sectors.
C-Test bump solution with configuration update keeps the Crowcon detectors correctly configured to ensure the product is consistently up-to-date without the need for a service or technician team.
The Crowcon Tetra gas detector is also water and dust resistant to IP65.
Crowcon Tetra Portable Gas Detector – Key Features
- Simple Operation – The Crowcon Tetra has a single button operation and an easy to read backlit display for gas readings and diagnostics.
- Robust Construction – The Tetra is manufactured from a rugged plastic housing in order to resist shock and vibration. The durable over moulded rubber adds extra protection and the IP65 rating ensures water and dust resistance.
- Audible Alarms – The loud, 94dBA audible alarm and ultra bright dual red/blue visual alarm ensures the user will be alerted to the presence of gas.
- Flexible Options – There is an optional built-in pump and  rechargeable & alkaline battery versions available. The device is also fully interchangeable with intelligent sensor modules.
Crowcon Tetra Gas Detector – available in rechargeable or disposable battery format and with or without an internal pump
Crowcon Tetra Gas Detector Bump Testing And Calibration
Routine bump testing is recommended for the range of Crowcon portable gas detectors prior to each use. Bump testing is a brief application of a gas to the sensor to invoke a prescribed reaction, ensuring the gas detector reacts as expected.
Bump testing provides a quick, easy and direct method of verifying gas detectors are performing as required and takes a lot less time than ‘zeroing’ the device.
The bump test is widely accepted as a suitable method of testing gas detection equipment.
Typical applications and industries for the Crowcon Tetra gas detector include CO2 detection in the brewing industry, oil and gas, petrochemical and offshore.
Detecting Gases In Hazardous Areas
Crowcon Tetra Portable Gas Detector
Product Specifications
| Size | Â Rechargeable 122 x 128 x 57mm (4.75 x 5 x 2.25 inches); Non-rechargeable 134 x 128 x 57mm (5.25 x 5 x 2.25 inches) |
| Weight | 498g (1.1lb) |
| Alarms | Audible –  94dB Multiple alarm sounds allow selection of distinctive tones for different alarm levels ; Visible Alarms Dual colour red/blue flashing LED in gas hazard ; Vibrating Alarm Internal vibrating alarm |
| Display | 128 x 64 graphic LCD with backlight, giving simultaneous display for all gas channels. Graphic symbols for battery (with proportional indication of remaining operation time), pump operation, healthy operation or fault warning. Start up indication when calibration is due within 30 days, calibration overdue, or service required. |
| Display mode | Normal display for real time gas concentration levels. Display recall for the Peak readings and TWA |
| Data logging | Timed datalogging: 50 hours at 1-minute data rate (>3,000 data logs of 4 channels) Event logging >1500 events |
| Battery | Rechargeable Li-ion battery Non rechargeable pack 3xAA Alkaline cells |
| Operating time | Â Rechargeable – 12 hour minimum based on pumped four gas unit with flammable sensor |
| Sampling | Hand aspirator or internal electric sampling pump |
| Operating temp range | 20OC to +55OC (-4OF to +131OF) Toxic and oxygen sensors are not rated for continuous operation at high temperatures. Consult Crowcon if operating temperature are likely to exceed 40OC (104OF) for extended periods. |
| Humidity | 20-90% RH |
| Ingress protection | IP65 |
| Approval codes | Europe  ATEX II 2G Ex ia d IIC T3 Gb (-20OC ≤ Ta ≤ 55Oc) BASEEFA 03ATEX0193 International IECEX Ex ia d IIC T3 Gb (-20OC ≤ Ta ≤ 55Oc) BAS04.0024 North America CSA UL/cUL Class I Division I Groups A, B, C, D, T3C |
| Safety standards | Europe EN60079-0, EN60079-11, EN60079-1, 94/9/EC ; North America UL913, CSA22.2, 152 ; Operating standards EN50270, EN50271, IEC61508, EN61779, EN45544 |
| Calibration | Tetra can be routinely calibrated manually using the menu, using Crowcon Portables PC software or automatically using Checkbox IMH. |
| Accessories | Tetra is supplied with an integral belt/pocket clip. Pumped units are supplied with a sampling kit (flow plate and 2m (6ft) tubing). |
| Optional accessories | Â Universal harness plate, shoulder strap, chest harness, carry case, aspirator assembly (flow plate bulb and 2m/6ft tubing), fixed and telescopic sample probes and an in-line water trap. |
Crowcon Tetra Portable Gas Detector
Gases Detected & Ranges
| Gas | Range | Typical Alarms (UK) |
| Flammable Gas | 0- 100% LEL | 20% |
| Oxygen (O2) | 0-25% | 19/23.5% |
| Hydrogen Sulphide (H2S) | 0-100ppm | 5ppm |
| Carbon Monoxide (CO) | 1-500ppm | 30ppm |
| Suphur Dioxide (SO2) | 0-20ppm | 1ppm |
| Ozone (O3) | 0-1ppm | 0.1ppm |
| Ammonia (NH3) | 0-100ppm | 25ppm |
| Carbon Dioxide (CO2) | 0-5% | 0.5% |
| Chlorine (CL) | 0-20ppm | 0.5ppm |
| Nitrogen Dioxide (NO2) | 0-20ppm | 1ppm |
| Hydrogen (H) | 0-1000pm | N/A |
| Hydrogen Cyanide (HCN) | 0-25ppm | 5ppm |
| Hydrogen Fluoride  (HF) | 0-10ppm | 1ppm |
| Phosphine (PH3) | 0-5ppm | 0.2ppm |
| Fluorine (F) | 0-1ppm | 0.1ppm |
| Phosphine (CCl2O) | 0-1ppm | 0.1ppm |
Crowcon Tetra Gas Detector
T&D provide competitive prices and delivery for all Crowcon Gas Detectors, including the Crowcon Tetra.
Gas Detection In High Voltage Substations, SWITCHGEAR Â & Hazardous Area Battery Rooms
See how Crowcon F-Gas Detector is used in the electrical utility industry to provide safe gas detection of SF6 in high voltage substations and gas insulated switchgear.
Gas Detection In High Voltage Substations, Switchgear & Cable Chambers. Image : ABB.
 ➡  Did you know? T&D distribute Zone 1 Hazardous Area ATEX Certified Lighting, Heating, Power products – this includes hazardous area portable heaters, LED lighting, plugs and sockets, control panels, enclosures and junction boxes for Zone 1 use.
