BM 500

Potentiometric level transmitter for hygienic applications

  • Continuous level measurement of liquids with hygienic requirements
  • Measuring range: 0.2…3 m
  • Electrical conductivity: ≥50 µs/cm
  • -20…+140°C; -1…16 barg

BM 500 – Version with VARIVENT® connection

BM 500 Potentiometric level transmitter – Version with VARIVENT connection

The BM 500 is a potentiometric level transmitter designed for hygienic applications with pasty or highly adhesive media such as fruit juice, ketchup, beer, toothpaste or mustard. It can make full use of its advantages in small tanks (<25  cm / <9.84") and ensures a fast response time. Thanks to its high temperature resistance, CIP and sterilization processes are not a problem.

Product highlights

  • Insensitive to foam, sticky or splashing media
  • Level measurement beyond 50 mm / 1.97"
  • Installation in small tanks (any direction or angle, no dead zone)
  • Suitable for CIP/SIP cleaning (+140°C / +284°F)
  • LED level monitoring
  • Empty tank detection

Typical applications

  • Hygienic applications in the food and beverage industry
  • Small tanks (<25 cm / <9.84”) with tough, pasty or strongly adhesive media
  • Buffer tanks on filling lines
  • Sticky media, wet powders, cheese, milk powder etc.

General information

Measurement principlePotentiometric
Level measurement typeContinuous measurement
Measured mediaLiquids, Pastes
Contact to measured mediumYes
Interface measurementNo
Measuring range (liquids)0.2…3 m/
0.7…10 ft
Process pressure-1…16 barg/
-14.5…232 psig
Process temperature-20…140°C/
Wetted partsAustenitic stainless steel (1.4404/316L)
GasketsEthylene propylene diene monomer (EPDM), Fluoroelastomer rubber (FKM/FPM), Kalrez® 6375, PFA
Accuracy (full scale)1%


Certificates/Approvals Hygienic3A, EC 1935/2004, FDA
Certificates/Approvals OthersEAC
Ingress protectionIP67, NEMA4X


Digital outputsHART®
Analogue outputs4…20 mA

Process connections

Hygienic connectionsDairy screw (DIN 11851): DN40, DN50
Tri-Clamp®: 2", 2 1/2"
Varivent®: N
SMS (1145): 51 mm
Weld-in sleeve: 50.5 mm / 1.98"

Related products

SU 600

Digital panel indicator for level transmitters

  • Digital indication and power supply for 4…20 mA/HART® level transmitters
  • With 2 integrated relays for pump control or other actuators
  • Wide-range power supply unit with 20…253 V AC/DC
  • Carrier rail, panel or wall mounting

View product details