RHE 28

Universal Mount

The RHE28 is an advanced function transmitter in a rugged epoxy coated enclosure designed for field mounting. With enclosure ratings up to IP67, the RHE28 has the flexibility to be installed in both ordinary and hazardous areas (Zone 2). 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
  • Backlit Color LCD
  • ATEX/IEC Ex, CSA approved
  • Rheonik Assurance Factor®

CONFIGURE

General Specifications

Enclosure Material

Coated cast aluminum universal field mount enclosure

Enclosure Rating

IP65 / NEMA 4. Optionally IP66 / NEMA 4X

Ambient Temperature:

-20°C (optionally -40°C) to +60°C / -4°F (-40°F) to +140°F

(reduced visibility below -20°C)

Dimensions:

170 x 272 x 93 mm / 6.7 x 10.7 x 3.7 in

Display:

Large high contrast backlit LCD 128 x 24. Screen changes color to indicate warning or error

Weight:

2.4 kg / 5.3 lb

Operation

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

Sensor Connection:

Cage clamp terminals.  Cable available in lengths up to 100m for connection to remote sensor

Analog Outputs:

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

Digital Outputs:

Up to 2 x configurable status outputs (IEC60946)

Pulse/Freq/Status Outputs

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

Digital Inputs:

Up to 2 x configurable control inputs (to IEC60946)

Analog Input (optional):

1 x 4-20mA analog input (active) for two-wire pressure or density sensor

Power Supply

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

Digital Data Communications:

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

Hazardous Area Approvals

ATEX / IECEx: RHE in ordinary locations or Zone 2, RHM in all zones

cCSAus: RHE in ordinary locations or Division 2, RHM in all divisions (see datasheet)

Cable Entries

2 x M16, 2 x M20 as standard

Optional metric and NPT entries available

Sensor and transmitter must have matching approvals (see datasheet).