Excellence in level and flow measurement.

Malvern, UK +44 (0)1684 891 371
Essex, UK +44 (0)1787 478771
Florida, USA +1 850 279 4882
KL, Malaysia +6 010 259 1332

IMP Lite

Lower-cost alternative to IMP+ for level measurement

IMP Lite product image


IMP Lite can be used wherever you need reliable non-contacting ultrasonic level measurement and digital echo processing means IMP Lite is perfect for slurries or liquids and anywhere you need a display telling you the level, or an analogue output to interface with your site control system or drive a display. The full IMP range is available with the wetted parts in PVDF build alternative for corrosive or aggressive applications.

Compact and low-profile

When used on battery power for intermittent (wake-up) applications, IMP Lite's high speed boot up of circa 3 seconds maximises battery life. For example, if an IMP Lite were switched on every 15 minutes for a 3 second reading, average current is a mere 40µA.

Active and passive (sourcing and sinking) analogue outputs assist with system integration, especially when retro-fitting into older installations.

PC Suite

IMP Lite InsidePC Suite is optional software that extends IMP's capabilities, allowing you to:

  • Download, analyse and store echo profiles. A great way to see exactly what is happening in the application. Fine tuning for ultimate performance.
  • Set-up IMP. All programming parameters are instantly visible in the PC Suite programming screens. Program the IMP unit on a desktop before installation, or clone a number of IMPs to save valuable time.
  • Updates. Future-proof your IMP! Pulsar's policy of continuous improvement means that we never stop developing our products. PC Suite allows new firmware to be installed into your
    units without even removing them from the application.
  • Flow Measurement. A flow curve may be added within PC Suite to configure for level to flow linearisation.



Software available to support this product:-



PC Software Suite

PC Software Suite

IMP Lite data sheetIMP Lite manualIMP Lite case studies

Full listing of Pulsar user manuals.


  • Level measurement
  • Sumps and tanks
  • Display requirements
  • High speed boot up requirements
  • Narrow beam angle requirements
  • Combined transducer and controller requirements
Dimensions: 175mm (6.9in) overall height x 130mm (5.12in) diameter
Cable entry: 2 off 16mm (0.63in) cable glands 3.5-10mm (0.14-0.39in) cable dia
Mounting: 1.5” (3m/10ft) and 6m/20ft) range versions), 2” (10m/33ft version) universal thread - suits BSP and NPT, parallel and tapered
Weight: Approximately 1kg (2.2lbs)
CE Approval: See EC Declaration of Conformity in the manual
Temp. range (process): -40ºC to +80ºC (-40ºF to +176ºF)
Temp. range (ambient): -20ºC to +65ºC (-4ºF to +149ºF)
IP Rating: IP67
Beam angle(-3dB half power): <10º inclusive
Operating frequency: 125kHz
Measurement range: 0.2m - 3m (0.66ft - 10ft)
Beam angle(-3dB half power): <10º inclusive
Operating frequency: 75kHz
Measurement range: 0.3m - 6m (0.98ft - 20ft)
Beam angle(-3dB half power): <10º inclusive
Operating frequency: 41kHz
Measurement range: 0.3m - 10m (0.98ft - 33ft)
Digital echo processing:  
Input voltage range: 11 - 30V, 3.5 - 22mA
Accuracy: ±0.25% or 6mm/0.24in (whichever is greater)
Resolution: ± 0.1% or 2mm/0.08in (whichever is greater)
4-20mA outputs: Resolution 5µA (both active and passive outputs)
Temperature compensation: Via internal temperature sensor (±0.5ºC accuracy). Level and volume conversion are installed allowing linearisation for tank shapes
2-wire configuration: RS232 (RJ11 port) connection for diagnostics and software updates
4 digit LCD display
4 button keypad for parameter entry
Power consumption: 3.5 - 22mA
Passive 4-20mA output
No flammable atmosphere approval
PC Interface - PC Suite: All parameters can be accessed and changed through PC Suite software. Echo traces may be viewed on screen.