GT-CT8900

Electrical Specification
Input Power 24VDC nominal, 20-36VDC, 5W max
Analog Output 0-22mA (500 Ω max. load)
<1 mA, Fault (1)
1.5mA Gas Check, Calibration, Setup mode (2)
4-20mA, Detection range
20-22mA, Over-range
Baud Rate: 2400, 4800, 9600, or 19200BPS
HART: HART7, HART Device Descriptor Language
(Optional) available, AMS Aware
Relay Ratings: 8A @ 250 VAC / 8A @ 30 VDC res. max
(Optional) Warning, Alarm, Fault
RS-485 Output: Dual redundant Modbus RTU,
(Optional) suitable for linking up to 128 units or up to 247
units with repeaters
Status Indicators: Digital Display with 4 LED indicators
for Warning, Alarm, Fault, Run
Cable Requirement: Three wire shielded cable
Max. distance between GT-CT8900 and power
source @ 24VDC nominal: 12AWG - 1600m
Max. distance for analog output (500 Ohms max):
12AWG - 4200m
Mechanical Specification
Housing: Aluminum alloy or 316 Stainless steel
Cable Entry: 3/4” NPT
Weight: 1.8Kg (Aluminum) / 4.3Kg (Stainless steel)
Product Specifications
Sensor Type: Continuous diffusion, low temperature catalytic bead
Sensor LIfe: 3 to 5 years typical
Measuring Renges: 0 ~ 100% LEL
Accuracy: ±3% LEL ( ≤ 50%LEL) , ±5% LEL ( > 50%LEL)
Response Time: T50 <10 s, T90 <30 s with 100% LEL methane applied
(T90 < 18 s typical value)
Zero Drift: < 5% of full scale per year
Operating Mode: Calibration, gas check, setup
Warranty: Two years
Other Specifications
Classification ATEX/ IECEx Ex db IIC T6 Gb IP66
(Tamb = -40 °C to + 70 °C)
SIL 2 Certified
Environmental Specifications
Operating Temperature Range: - 40°C to + 70°C / - 40°C to + 200°C (High temperature sensor optional)
Storage Temperature Range: - 50°C to + 85°C
Operating Humidity Range: 5% to 100% RH, non-condensing