IMSL Silicon Level Transmitter

  • Accuracy <+/-0.1% FS BFSL (0.06% optional)
  • Pressure Ranges Pressure ranges available from 0.5mWG to 100mWG
  • Variety of Outputs Variety of outputs including mV, Volts and mA
  • Choice of Cable Materials Cable material in PUR, PVC or FEP
Product Options


The IMSL submersible level transmitter is ideal for applications requiring continuous submersion in liquids such as water, oil and other non aggressive chemicals. The IMSL offers excellent repeatability, resolution and stability for use in rivers and reservoir measurement. It uses the latest piezo-resistive media isolated silicon sensing technology and stainless steel diaphragm. A 316L stainless steel housing makes this submersible level transmitter the ideal product for repeatable and reliable hydrostatic level measurement. The IMSL is tempearture compensated and calibrated. Each device comes with a traceable serial number and calibration certificate.

Manufactured by: Impress Sensors & Systems
Model: IMSL Silicon Level Transmitter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


River level
Reservoir level
Tank level
Borehole level
Aquifer level
Environmental monitoring
V-notch weir flow measurement


Output Signal And Supply Voltage
2-Wire 4-20mA
3-Wire 0-5V dc
0-10V dc
0-2.5V dc
0.5-4.5V dc
(others on request)
4-Wire See spec sheet at
Supply Voltage
2-Wire 9-32V dc
3-Wire 9-32V dc
13-32V dc
6-32V dc
5V dc
(others on request)
4-Wire 3-12V dc
Accuracy (non-linearity) <±0.1% /FS (BFSL)
<±0.06% / FS (BFSL) optional
Hysteris <±0.05% / FS typ.
Setting Errors (offsets)  
2-Wire Zero and Full Scale, <±0.5% /FS
3-Wire Zero and Full Scale, <±0.5% /FS
4-Wire See spec sheet at
Permissible Load  
2-Wire Rmax = [(Voltage Supply - 9) / 0.02]Ω
3-Wire Rmin = 10 kΩ
Output Resistance  
4-Wire ≤200m bar: 2.7-3.3 kΩ, >200m bar:4.0 - 6.0 kΩ
Influence Effects  
Supply mV/V & 0.5 to 4.5 V - Ratiometric, other outputs - <0.005 % FS /1V
Load 0.05 % FSO / kΩ
Permissible Temperatures and Thermal Effects
Media Temperature -20°C to + 60°C (non freezing)
Storage Temperature -20°C to + 70°C
Compensated Temperature Range 20°C ±25°C
Thermal Zero Shift (TZS) < ± 0.02% / FS / °C (option code 2)
< ± 0.01% / FS / °C (option code 1)
Thermal Span Shift (TSS) < ± 0.01% / °C
Electrical Protection
Supply Reverse Polarity Protection No damage but also no function
Lightning Protection Internally fitted
Electromagnetic Compatibility CE Compliant
Mechanical Stability
Shock 100 g/11 ms
Vibration 10 g RMS (20 ... 2000 Hz)
Housing 316L Stainless Steel
O Ring Seals Viton
Diaphragm 316L Stainless Steel
Cable Sheath Material PUR
PVC (optional)
FEP (optional)