Massflow Transm. RHE 21 – Exd Field Mount

The RHE21 is an advanced function, explosion proof, field mount transmitter. With a corrosion resistant stainless steel enclosure and through-glass operation capability, the RHE21 is rated to IP67 and suitable for the most extreme of installation environments. Multifunction capability provides real time mass and volumetric flow plus density and temperature indication with the option of connecting external sensors such as pressure transducers or precision densitometers for even greater measurement accuracy. Features such as API Standard Volume correction and Net Oil calculation are available. The RHE21 supports connection to any of the wide range of RHM series of mass flow sensors and can be supplied with a tamperproof switch for critical applications. When the unique Rheonik Assurance Factor® advanced diagnostics package is included, the RHE21 gives headache-free operation and provides deep insight into measurement conditions for precise process control.

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SKU: RHE 21 Categories: ,
Description

Description

MEASUREMENTS Mass Flow
Volumetric Flow
Density
Temperature
FUNCTIONS Batch / Filling Control
Standard Volume Gas Flow
Assurance Factor®
API std. Volume, Net Oil
Tamperproof Lock Switch
OUTPUTS 2 x Analog
2 x Frequency / Pulse
2 x Digital Status
INPUTS 2 x Digital
1 x Analog
INTERFACES PC USB / RHECom
RS 485 / Modbus RTU
HART over Analog
DISPLAY Backlit Color LCD
APPROVALS ATEX / IEC Ex
CSA
About Rheonik

Products & Features

Rheonik Coriolis mass flow meters use a unique, patented "Omega" tube design with torsion rods and mass bars to directly measure mass flow, density, and temperature with high accuracy for gases and liquids.

  • Omega Tube Design: The distinctive "omega" shape of the measuring tubes is optimized for torsion, enhancing sensitivity and mechanical reliability.
  • Coriolis Force Measurement: Driven by electromagnetic coils, the tubes oscillate. As fluid flows through, the Coriolis force deflects the tubes, creating a phase shift (time delay) between the sensors, which is directly proportional to mass flow.

Key Benefits:

  • High-Pressure & High-Temperature Capability: Designed to operate under extreme conditions (e.g., -200°C to 400°C and 900+ bar).
  • Versatile Applications: Suitable for liquids, sludge, and gases. 
  • High Accuracy: Suitable for custody transfer (OIML/NTEP).
  • Robustness: Excellent performance with entrained gas and high-viscosity materials.
  • Wide Rangeability: 100:1 turndown ratio is common.