A Product by Pulsar Process Measurement

IMP+ can be used wherever you need reliable non-contacting ultrasonic level measurement and digital echo processing means IMP+ 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.


  • Level measurement
  • High speed boot up requirements
  • Narrow beam angle
  • Combined transducer and controller
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/33ftversion) universal thread - suits BSP and NPT, parallel and tapered
Weight:Approximately 1kg (2.2lbs)
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 andvolume conversion are installed allowing linearisation for tank shapes
IMP may be wired as either 2-wire or 3-wire, giving the featuresbelow:
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
3-wire configuration (additional to 2-wire):Backlit LCD display
0-10V analogue output
2 relays: single pole two way, 1A 30VDC/AC
Power consumption with relays energised <60mA (less 12mA/relay notenergised)
Active and passive 4-20mA outputs
PC Interface - PC Suite:All parameters can be accessed and changed through PC Suite software. Echo traces may be viewed on screen.