ProSens is a new line of modern industrial devices, which integrates transmitters, displays, meters and controllers functionalities.
Modern transmitters, meters, controllers.

ProSens QM-422

  • transmitter, display, meter and controller in one package
  • integrated axial temperature or temperature and humidity probe, Ø12 mm, L=300 mm, stainless steel 316L probe and filter cap
  • 1 or 2 universal inputs: 0/4-20 mA, 0-10V, 0-150 mV, RTD or TC
  • 0, 1 or 2 REL outputs (electronic NO)
  • 0, 1 or 2 analogue outputs, passive or active
  • RS-485 / Modbus RTU
  • option: very clear 2.9’’ graphic LCD display, 128 x 64 points, with backlight
  • free configuration software S-Config

ProSens is a new line of modern industrial instruments, which integrates sensors, converters, meters and controllers functionalities. Using the latest miniaturisation technologies these compact instruments are able to be equipped with one independent universal input, two binary or two analogue outputs, as well as communication port RS-485 with Modbus protocol.

Model QM-422 has integrated axial temperature or temperature and humidity probe, Ø12 mm, L=300 mm, stainless steel 316L probe and filter cap.

A large built-in display and output signals mean that the ProSens line units find applications in control systems. There are many industrial applications, where ProSens can act as stand-alone controller. It can also cooperate with master devices via Modbus protocol, being part of big network, which makes it perfect instrument for distributed monitoring system.

Web site dedicated to ProSens line:


Type of probe
axial integrated, L=300 mm, Ø 12 mm, stainless steel 316L probe and filter cap
Probe parameters
temperature: -50...120°C (typ. error ±0.5°C @ -10...+85°C)
temperature and humidity: temperature measuring range: -40...120°C (typ. error ±0.2°C @ 10...60°C; 0.4°C @ -30°C; 0.7°C @ 120°C); humidity measuring range: 0...100% RH (typ. error ±1.8% RH; 20...80% @ 25°C
Input type
Input range
0/4...20 mA
0...60 mV, 0...75 mV, 0...100 mV, 0...150 mV
0/1...5V, 0/2...10V
Pt100, Pt500, Pt1000: -100...+600°C
TC K: -200...+1370°C, S: -50...+1768°C, J: -210...+1200°C, T: -200...+400°C, N: -200...+1300°C, R: -50...+1768°C, B: +250...+1820°C, E: -200...+1000°C
Output type
depends on configuration:
electronic relay NO, 24V AC/35V DC, max. 200 mA
0/4...20 mA: active current, operating range 0...24 mA max., load resistance 700 Ω max., resolution 13 bit
4...20 mA: passive current, isolated, operating range 2,8...24 mA max., load resistance 600 Ω@24VDC, resolution 13 bit
0/1...5V, 0/2...10V: active voltage, operating range 0...11V max., load resistance min. 2000 Ω, resolution 13 bit
Power supply
11...36V DC
16...36V DC (0...10V out.)
no display
LCD, 128 x 64 pixels, graphic, with backlight
Communication Interface
RS-485 / Modbus RTU
Transmission parameters
1200...115200 bit/s, 8N1 / 8N2
Operating temperature
-30...+80°C, case with electronics
Protection class
IP 65
IP 67
Case material
Case dimensions
120 x 90 x 50 mm