Explosion-Proof Temperature & Humidity Transmitter

The Explosion-Proof Temperature and Humidity Transmitter is a robust and reliable device designed for precise environmental monitoring in hazardous or complex industrial conditions.

Built with a cast aluminium explosion-proof housing and rated IP65, it ensures safe, stable operation in challenging applications such as natural gas pipeline networks, power plant air systems, and pharmaceutical clean rooms.

The transmitter utilises imported high-precision temperature and humidity sensors, providing fast response and long-term stability even under fluctuating process conditions. A clear LCD dual display shows both temperature and humidity readings simultaneously for easy on-site monitoring.

Two intrinsically safe versions are available:

• Gas Explosion-Proof Model (with display) – suitable for Zone 0, Zone 1, and Zone 2

• Dust Explosion-Proof Model – suitable for Zone 20, Zone 21, and Zone 22

Compliant with CE and RoHS standards, this transmitter delivers the reliability, accuracy, and safety required for modern industrial and energy management systems.

Why Choose This Temperature & Humidity Transmitter
✔ Explosion-proof and dust-proof certified for hazardous locations
✔ High-precision imported sensors with fast response time
✔ Dual LCD display for temperature and humidity values
✔ Cast aluminium housing, IP65 protection rating
✔ Intrinsically safe design suitable for Zones 0–2 and 20–22
✔ Complies with CE and RoHS for industrial safety and quality assurance

Intrinsically Safe Temperature and Humidity Transmitter with Probe LFH71
Relative Humidity
Sensor	Digital
Range	0%~100%RH
Output	4~20mA(two wire)
Accuracy	±3%@20°C & 20~80%RH
Response Time	≤15s (20°C, Slow flow air)

Relative Temperature

 

Sensor	Digital
Range	0~50°C，-20~60°C etc
Output	4~20mA(two wire)
Accuracy	±0.3°C@20'c, For other accuracy, refer to the digital sensor temperature accuracy curve below.

 

 

The digital sensor temperature accuracy curve

 

 

 

Intrinsically safe parameters

 

 

Explosion-proof Marking	With display: Ex ia IIC T6/T4 Ga Without display: Ex ia IIC T6/T4 Ga; Ex ia IIIC T200 85°C/T200 135°C Da
Explosion-proof Certificate	CE24.2060X
Intrinsically Safe Parameters	(RH+、RH-) : Ui : 28VDC; li : 93mA; Pi : 0.65W; Ci : 0.02uF; Li : 0mH (T+、T-) : Ui : 28VDC; li : 93mA; Pi : 0.65W; Ci : 0.02uF; Li : 0mH
Environment Temperature	T4 : -40°C~80°C; T6 : -40°C~60°C

 

 

Other parameters

 

 

Power Supply	9~28VDC
Maximum Power	0.04UV (W) (UV=supply voltage)
Output Load	≤500Ω
Display	Intrinsically safe: Optional LCD display (with unit without backlight) Dust intrinsically safe: No display
Housing Material	ADC12, stainless steel probe and sintered mesh filter
Working Temperature	T4: -40°C~80°C; T6: -40°C~60°C, 5%~95%RH (non-condensing)
Protection Class	IP65
Weight	≈666g(Wall-mounted) ≈760g(Duct type) ≈813g(Split type, without accereceries)
Certificates	CE,Intrinsically Safe Explosion-proof, Dust Intrinsically Safe Explosion-proof

 

 

WARNING

 

1.The product housing is made of aluminium alloy, please avoid the risk of ignition during use due to impact or friction.

2. The housing must be reliably grounded during installation.

3.The product display is made of plastic with a potential danger of electrostatic charge. Please avoid friction during use, or wipe

with a wet cloth when cleaning.

4. When the product is used in explosive dust environments, there is a potential danger of electrostatic charge, so it should not

be used in areas affected by charge-generating processes, mechanical friction, separation processes, electronic emission and

pneumatic transmission of dust.