RHE 27

Panel Mount

The RHE27 is an advanced function transmitter designed for rack or panel mounting in an indoor environment. Features such as API Standard Volume correction and Net Oil calculation are available.  


  • Measures Mass Flow, Volumetric Flow, Density and Temperature
  • Outputs 2 x Analog, 2 x Frequency/Pulse, 2 x Digital Status,´
  • Inputs 2 x Digital, 1 x Analog
  • PC USB for RHECom, RS 485 for Modbus RTU, HART over Analog
  • Optional Backlit Color LCD
  • ATEX/IEC Ex, CSA approved
  • Rheonik Assurance Factor®



General Specifications


IEC 61554 Panel Mount Housing. Optional lockable front cover

Enclosure Rating:

IP20 (front). IP54 with lockable front cover

Ambient Temperature:

-20°C to +60°C (-4°F to +140°F)


96 x 144 x 61/75 mm (3.78 x 5.67 x 2.4/2.95 in)


Backlit color LCD.  Screen changes color to indicate warning or error


0.55 kg (1.2 lb)


3 x front panel operator buttons for all menu navigation and settings

Sensor Connection:

Pluggable terminal strip.  Cable available in lengths up to 100m for connection to remote sensor

Analog Outputs:

Up to 2 x 4-20mA outputs, active / passive, compl. to NAMUR NE-43

Uncertainty of the analog output +/- 0.1% of reading, +/- 10µA

Digital Outputs:

Up to 2 x configurable status outputs (IEC60946)

Pulse/Frequency Outputs:

Up to 2 x configurable pulse/frequ. outputs (IEC60946), max 10 kHz

Digital Inputs:

Up to 2 x configurable control inputs (IEC60946)

Analog Input (optional):

1 x 4 - 20 mA analog input (active) for two-wire external sensor

Power Supply:

100-240 VAC (48 to 62 Hz), 5W or 12-24 VDC +/- 10%, 4W

Digital Data Communications:

Modbus RTU (RS485)
Connection to a PC (USB) with Rheonik RHECom software
HART over analog output (optional)

Hazardous Area Approvals:

ATEX / IECEx, cCSAus for RHE27 in ordinary area, RHM in all zones - please see Part Number Code page. Others available on request