Product Features
Now with improved detection of pentane, hexane and other long-chain hydrocarbons. The T4 contains a wide range of powerful features to make everyday use easier and safer:
TWA Resume
Unique to T4, the TWA Resume function ensures toxic gas exposure is calculated accurately over an entire shift,
even if T4 is switched off for a break or during travel to another site.
When most portable detectors are turned off, the algorithm that assesses TWA exposure assumes that it’s the end of the shift. When turned on again, these detectors act as if it is a new work shift, ignoring all previous measurements. The TWA Resume function, however, provides the option to include previous measurements from within the correct time frame.
18-hour battery
With a battery life of 18 hours, T4 allows multiple or longer shifts to be worked between recharging.
Positive Safety
Crowcon’s visual ‘traffic light’ indication, provides constant visual assurance that T4 is operating soundly and conforms to site bump test & calibration policy. The bright green and red Positive Safety LEDs are visible to all and offer a quick, simple and comprehensive indication of monitor status to both the user and others around them.
| Size | W135 x H80 x D35 mm (5.3 x 3.1 x 1.4in) |
| Weight | 282g (9.9oz) |
| Durability | Drop tested to 4m onto concrete |
| Alarms | Audible >95dB Bright red/blue visual LEDs Integrated vibrating alert |
| Display | Front-mounted, backlit. Optional 180° flip for easy viewing whilst worn |
| Logging | 130 hours of data logging; Up to 3500 events |
| Battery | Rechargeable Li-ion 18 hour typical runtime 5.5 hour recharge |
| Operating temperature | -20°C to +55°C (-4°F to +131°F)* |
| Humidity | 10 to 95% RH @ 40°C non-condensing |
| Ingress protection | Independently tested to IP65 and IP67 |
| Approvals | IECEx: Ex db ia IIC T4 Gb Tamb -20°C to +55°C ATEX: Ex II 2 G Ex db ia IIC T4 Gb Tamb -20°C to +55°C UL: Use in hazardous locations Class 1 Div 1, groups A, B, C and D only as to intrinsic safety INMETRO: Ex db ia IIC T4 Gb Tamb -20°C to +55°C |
| Compliance | EMC Directive 2014/30/EU |
| Interface | USB communications lead |
| Accessories | Available separately: Single unit cradle charger, 10 unit cradle charger, vehicle charger Clip on filter plate for sensor protection in dusty environments I-Test automated bump and calibration station |
| Crowcon Connect Compatible? | Yes |
* Toxic and oxygen sensors are not rated for continuous operation above 50°C (122°F)
| Gas | Range | Resolution |
| Carbon monoxide (CO) | 0-1000ppm | 1ppm |
| Flammable | 0-100% LEL | 1% LEL |
| Hydrogen sulphide (H2S) | 0-100ppm | 1ppm |
| Oxygen (O2) | 0-30% vol. | 0.1% vol. |
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