Crowcon Tetra T4 Multi Gas Detector
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Crowcon Tetra T4 Multi Gas Detector
The Crowcon Tetra-T4 is a rugged and portable multi-gas detector designed to monitor up to four gases simultaneously, including flammable gases, oxygen (O₂), carbon monoxide (CO), and hydrogen sulphide (H₂S). Available in two, three, and four-gas configurations, the Tetra-T4 features enhanced combustible gas detection sensitivity for methane, pentane, hexane, and other long-chain hydrocarbons. Built for demanding environments, it offers long battery life, simple single-button operation, and advanced features such as TWA Resume technology for accurate exposure monitoring across entire work shifts.
Features & Benefits
- Multi-Gas Monitoring: Simultaneously detects flammable gases, oxygen, carbon monoxide, and hydrogen sulphide.
- Flexible Configurations: Available in two, three, and four-gas models.
- TWA Resume Function: Continues calculating Time Weighted Average (TWA) exposure over an entire 8-hour shift, even after the detector is switched off and back on.
- Extended Battery Life: Up to 18 hours of operation, supporting multiple or extended work shifts without recharging.
- Enhanced Hydrocarbon Detection: Combustible sensor optimized for methane with improved sensitivity to pentane, hexane, and other long-chain hydrocarbons.
- Rugged Construction: Drop-tested from up to 4 metres onto concrete for reliable performance in harsh environments.
- Simple Operation: Single-button operation with an intuitive menu system, suitable for use while wearing gloves.
- Clear Status Indicators: Green LEDs indicate normal operation, while red and blue LEDs signal alarms or required actions.
- Multiple Alarm Types: 95 dB audible alarm and vibration alert ensure warnings are noticed in noisy workplaces.
- Rotatable Display: Backlit screen can be rotated 180° for user preference and improved readability.
- Dedicated Sensors: Individual sensors for each gas eliminate dual-toxic sensor limitations.
- Optional Sensor Protection: Clip-on filter cover available to protect sensors from dirt and contaminants.
Measuring Ranges
| Gas | Measurement Range | Resolution |
|---|---|---|
| Oxygen (O₂) | 0 – 30% Vol | 0.1% Vol |
| Flammable Gases | 0 – 100% LEL | 1% LEL |
| Hydrogen Sulphide (H₂S) | 0 – 100 ppm | 1 ppm |
| Carbon Monoxide (CO) | 0 – 1000 ppm | 1 ppm |
General Specifications
| Gas Detection Capability | Up to 4 gases simultaneously |
|---|---|
| Battery Life | Up to 18 hours |
| Ingress Protection | IP65 (Dust-tight and protected against water jets), IP67 (Short-term water immersion) |
| Data Logging Capacity | 130 hours at 10-second intervals |
| Event Logging Capacity | 3,500 events |
| Alarm Types | Visual LEDs, 95 dB Audible Alarm, Vibrating Alarm |
| Display | Backlit LCD with 180° rotation capability |
| Approvals | ATEX, IECEx, UL |
| Warranty | 2 Years (Upgradeable to 3 Years) |
| Dimensions | 135 × 80 × 35 mm (5.3 × 3.1 × 1.4 in) |
| Weight | 282 g (9.9 oz) |
Additional Features
- Suitable for harsh industrial environments
- Rubber shockproof casing for enhanced durability
- Optional clip-on filter cover for sensor protection
- Dedicated sensors for each monitored gas
- Simple operation with gloves
- Drop-tested from 4 metres onto concrete
- Visual compliance indication through status LEDs
Standard Package Contents
- Crowcon Tetra-T4 Gas Detector
- Rubber Protective Boot
- Alligator Clip for Secure Attachment
- Quick Start Guide
- Bump/Calibration Cap
- Calibration Certificate
- Declaration of Conformity
Note: Charger is not included with non-kit versions and must be purchased separately. Standard four-gas configurations are available for fast delivery.
T4 Main Unit
| Product Code | Description |
|---|---|
| Standard Configuration | |
| T4-HOCA | 4 gas – H2S, O2, CO,CH4 % LEL |
| T4-ZOCA | 3 gas – O2, CO,CH4 % LEL |
| T4-HOZA | 3 gas – H2S, O2, CH4 % LEL |
| T4-ZOZA | 2 gas – O2,CH4 % LEL |
| T4-ZOCZ | 2 gas – O2,CO |
| T4-HOCA-H2 | 4 gas – H2S, O2, CO (H2 resistant),CH4 % LEL |
| T4-ZOCA-H2 | 3 gas – O2, CO (H2 resistant),CH4 % LEL |
| Order charger separately | |
| T4-EW3 | Extend warranty to 3 years. Includes sensors & battery. Add this code as a second line on the order. |
| Alternate alarm levels / certifications | |
| T4-HOCA-XX | 4 gas – H2S, O2, CO,CH4 % LEL |
| T4-ZOCA-XX | 3 gas – O2, CO,CH4 % LEL |
| T4-HOZA-XX | 3 gas – H2S, O2, CH4 % LEL |
| T4-ZOZA-XX | 2 gas – O2,CH4 % LEL |
| T4-ZOCZ-XX | 2 gas – O2,CO |
| T4-HOCA-H2-XX | 4 gas – H2S, O2, CO (H2 resistant),CH4 % LEL |
| T4-ZOCA-H2-XX | 3 gas – O2, CO (H2 resistant),CH4 % LEL |
| T4-EW3 | Extend warranty to 3 years. Includes sensors & battery. Add this code as a second line on the order. |
| Including cradle charger | |
| T4-HOCA-XX-CRD | 4 gas – H2S, O2, CO,CH4 % LEL |
| T4-ZOCA-XX-CRD | 3 gas – O2, CO,CH4 % LEL |
| T4-HOZA-XX-CRD | 3 gas – H2S, O2, CH4 % LEL |
| T4-ZOZA-XX-CRD | 2 gas – O2,CH4 % LEL |
| T4-ZOCZ-XX-CRD | 2 gas – O2,CO |
| T4-HOCA-H2-XX-CRD | 4 gas – H2S, O2, CO (H2 resistant),CH4 % LEL |
| T4-ZOCA-H2-XX-CRD | 3 gas – O2, CO (H2 resistant),CH4 % LEL |
| T4-EW3 | Extend warranty to 3 years. Includes sensors & battery. Add this code as a second line on the order. |
Where XX is region/approval (See above) ATEX, IECEx, UL
| Region/ Approval | Approval |
|---|---|
| (standard) | O2: 19.0/23.5%, CH4: 20/40%, CO: 30/100 ppm, H2S: 5/10 ppm |
| S2 | O2: 19.0/23.5%, CH4: 10/20%, CO: 30/100 ppm, H2S: 5/10 ppm |
| DE | O2: 19.0/23.5%, CH4: 20/40%, CO: 30/100 ppm, H2S: 5/10 ppm |
| ES | O2: 19.0/23.5%, CH4: 20/40%, CO: 30/100 ppm, H2S: 5/10 ppm |
| FR | O2: 19.0/23%, CH4: 20/40%, CO: 30/100 ppm, H2S: 5/10 ppm |
| IT | O2: 19.0/23.5%, CH4: 20/40%, CO: 30/100 ppm, H2S: 5/10 ppm |
| NL | O2: 19.0/23.5%, CH4: 10/40%, CO: 25/50 ppm, H2S: 1.6/5 ppm |
| PL | O2: 19.0/23%, CH4: 20/40%, CO: 20/100 ppm, H2S: 5/10 ppm |
| SG | O2: 19.5/23.5%, CH4: 10/40%, CO: 25/100 ppm, H2S: 10/15 ppm |
| US | O2: 19.5/23.5%, CH4: 10/20%, CO: 35/50 ppm, H2S: 10/15 ppm |
| BR (INMETRO) | O2: 19.0/23.5%, CH4: 20/40%, CO: 30/100 ppm, H2S: 5/10 ppm |
T4 bundles
| Product Code | Description |
|---|---|
| T4-HOCA-10 | 10 x 4 gas – H2S, O2, CO,CH4 % LEL Includes 10 way charger |
| T4-ZOCA-10 | 10 x 3 gas – O2, CO,CH4 % LEL Includes 10 way charger |
| T4-HOZA-10 | 10 x 3 gas – H2S, O2, CH4 % LEL Includes 10 way charger |
| T4-ZOZA-10 | 10 x 2 gas – O2,CH4 % LEL Includes 10 way charger |
| T4-HOCA-H2-10 | 10 x 4 gas – H2S, O2, CO (H2 Resistant),CH4 % LEL Includes 10 way charger |
| T4-ZOCA-H2-10 | 10 x 3 gas – O2, CO (H2 Resistant),CH4 % LEL Includes 10 way charger |
T4 Chargers
T4 main unit does not include a charger
| Product Code | Description |
|---|---|
| T4-CRD | T4 Cradle charger and multi region power supply |
| T4-TWC | T4 10 way charger and multi region power supply – available only for ATEX/IECEX regions Includes Europe, UK |
| T4-VHL | T4 vehicle charger and vehicle charging adaptor |
| T4-VHL-BR | T4 vehicle charger – Inmetro Includes vehicle charging adaptor |
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