gas transmitter : It can continuously measure the concentration of site gas and convert it into 4-20mA output.
gas transmitter
TGas-1031 online gas transmitter
Main features
1.Two kinds of optional mode of power supply, including centralized busbar type and independent area type
2. High and low concentration alarm, performing real-time monitor to gas
3.Anti-poisoning type gas sensor with high sensitivity
4.Automatic modification of ageing curve of sensor, keeping constant alarm sensitivity
5. Function of automatic recognition of sensor trouble, function of high concentration gas above-norm of sensor
6. Function of automatic detection at starting up, and it has advanced function of self-diagnosis and self-reparing.
7. The calibrated concentration value is adjustable, facilitating users to set by themselves
8. When the sensor loses the function of monitoring alarm because of ageing,
the detector is capable of automatic recognition and alarm, so as to effectively avoid missing report.
Technical parameters
Parameters | Characteristics |
Detectable gas | Combustible vapour of liquids, including methane, LPG, coal gas and gasoline, etc., as well as poisonous and harmful gas |
Measurement precision | ±5%F.S |
Repeatability | 2% |
Measurement range | Refer to lectotype table for details |
Drift | Zero drift: ±2%F.S Range drift: ±5%F.S |
Response time | <30s(T90) |
Sampling method | Diffusion |
Working environment | Temperature: -30°C to 60°C; humidity: below 85% (no coagulation) |
Remote control mode | By the adjustment mode by infrared remote control, the detector can be adjusted without opening of cover |
4-20mA output | 4-20mA output corresponding to 0-100%, maximum load 800 ohms |
Alarm output | The effective alarm is 1 point or 2 points; each alarm shall use SPDT electronic relay. Contact rating of alarm relay: Ohmic load: 5A@24Vdc or 120Vac or 240Vac Inductive load: 50VA |
Communication | Communication description: two-wire system parallel RS485 protocol, 32 points at most Connection: Twisted pair with shield Distance: maximum 1000m |
Input voltage | 24VDC±25%; power: 2W/way |
Certificate | Explosion-proof grade: ExdIICT5 Protection class: IP66 |
Using cable | ≥2.5mm2×4 Screened cable line, outside diameter of cable is required to be between 6mm- 9mm |
Lectotype table for detected gas (part gas)
Model | Range | Low alarm setting range | High alarm setting range | Low alarm point | High alarm point |
TGas-1031-FL | 0-100%LEL | 10%LEL-5%LEL | 25%LEL-80%LEL | 20%LEL | 50%LEL |
TGas-1031-CO | 0-500ppm | 25ppm-100ppm | 100ppm-500ppm | 35ppm | 200ppm |
TGas-1031-CO | 0-1000ppm | 25ppm-100ppm | 100ppm-500ppm | 35ppm | 200ppm |
TGas-1031-H2S | 0-100ppm | 5ppm-15ppm | 15ppm-30ppm | 10ppm | 15ppm |
TGas-1031-SO2 | 0-100ppm | 1ppm-3ppm | 3ppm-10ppm | 2ppm | 5ppm |
TGas-1031-CL2 | 0-20ppm | 3ppm-10ppm | 5ppm-15ppm | 5ppm | 10ppm |
TGas-1031-NH3 | 0-100ppm | 20ppm-30ppm | 30ppm-70ppm | 25ppm | 50ppm |
TGas-1031-NO | 0-250ppm | 20ppm-50ppm | 50ppm-100ppm | 25ppm | 50ppm |
TGas-1031-NO2 | 0-100ppm | 1ppm-2ppm | 2ppm-5ppm | 1ppm | 2ppm |
TGas-1031-HCN | 0-30ppm | 5ppm-10ppm | 10ppm-15ppm | 5ppm | 10ppm |
TGas-1031-PH3 | 0-1ppm | 0.3ppm-0.5ppm | 0.5ppm-0.8ppm | 0.3ppm | 0.6ppm |
