omni instruments | sensors and data acquisition equipment

Sales & Technical Support

Edit Content

Intrinsically Safe Temperature & Humidity Transmitter – HF5-EX

The HF5-EX series can only be used together with the intrinsically safe HC2-EX probes to provide a temperature and humidity monitoring system suitable for use in a Zone 1 or 2 Hazardous Area. The relative humidity and temperature can be displayed and output as analogue 4-20mA signals. Calculated psychrometric values such as dew point or mixing ratio can also be derived and provided as one of the output signals. Probes are interchangeable and suitable for mounting in Zone 0/20. Ranges: Temperature -40 to +60C, Relative Humidity 0 to 100%. Accuracy 0.8%RH, 0.1C.

Need help finding the right product?

Description

Applications

The HF5-EX series transmitters is a two-channel transmitters for the exact measurement of humidity and temperature in explosive atmospheres. This device conforms to the latest international standards and probes are certified for operation in Zone 0/20 and transmitter itself certified for Zone 1/21. The HF5-EX series consists of a robust aluminium transmitter with or without display. The system doesn’t require an intrinsically safe power supply as the circuitry design includes electrical isolation of the measuring system.

Specifications

Device Type HF520EX 2 x 2-wire
Probe Type HC2-EX Probe (Available separately)
Probe Cable Extension Passive: Max 10m
Accuracy at 23°C, ±5°C ±0.8%RH / 0.1°C
Start-up Standard Cold <60 secs / Warm <30 secs
Measurement Range -40 to +60°C / 0 to 100%RH
Electronic Operating Range -40 to +60°C / 0 to 100%RH (-10 to +60°C with Display)
Display Option Optional LCD Without Backlight
Output Signals 2 x 4-20mA, Two Wire.
Power Supply 10-28vDC
Power Consumption Max 2 x 24mA, Start Up / 2 x 20mA, Operation.
Serial Interface UART Internal Service Interface (Only to be used outside the hazardous area)
Housing Material Aluminium (IP66)
Cable Connections 1 x M16 x 1.5 Gland
ATEX Directive EU94/9/EC (ATEX)
ATEX Identification

 

II 2(1) G Ex eb mb [ia Ga] IIC T5 Gb

II 2(1) D Ex tb [ia Ga] IIIC T80°C Db

HC2-SM-EX

£581.00

Intrinsically safe HC2 probe for EX applications. 104mm probe fits directly to an HF5 EX transmitter. Ranges Temperature -40 to +60°C, Relative Humidity 0 to 100%. Accuracy 0.8%RH, 0.1°C.

HC2-IM102-EX

£1,449.00

Intrinsically safe HC2 probe for EX applications with a 2m cable mounted 125mm stainless steel probe for humidity and temperature monitoring. For use with the HF5 EX series of transmitters. Ranges Temperature -40 to +60 C, Relative Humidity 0 to 100%. Accuracy 0.8%RH, 0.1 C.

HC2-IM105-EX

£1,516.00

Intrinsically safe HC2 probe for EX applications with a 5m cable mounted 125mm stainless steel probe for humidity and temperature monitoring. For use with the HF5 EX series of transmitters. Ranges Temperature -40 to +60°C, Relative Humidity 0 to 100%. Accuracy 0.8%RH, 0.1°C.

HC2-IM110-EX

£1,622.00

Intrinsically safe HC2 probe for EX applications with a 10m cable mounted 125mm stainless steel probe for humidity and temperature monitoring. For use with the HF5 EX series of transmitters. Ranges Temperature -40 to +60°C, Relative Humidity 0 to 100%. Accuracy 0.8%RH, 0.1°C.

HC2-IM302-EX

£1,606.00

Intrinsically safe HC2 probe for EX applications with a 2m cable mounted 285mm stainless steel probe for humidity and temperature monitoring. For use with the HF5 EX series of transmitters. Ranges Temperature -40 to +60°C, Relative Humidity 0 to 100%. Accuracy 0.8%RH, 0.1°C.

We are here to help

Need help with your products or have a question for us on our custom systems? Use the form below to send us a message and our experts will be in touch to help.

Enquire now