Radar level transmitter

Level measurement without contact for liquids

Range 20m

Radar pulses 80GHz

IP67/IP68 (Sensor) – IP68 opt.

4÷20mA output

2 configurable relays

Remote control via Smartphone


Compact unit for level measurement of liquids and RPL81 is unaffected by temperature fluctuations, high pressure and condensation.
Thanks to his precise signal focusing it provides a reliable and accurate measurement.RPL81 can be easily configured by: on-board push buttons (IP67 version only); VL620/621, “display/programming module”; MODBUS RTU s/w; BLUETOOTH + SGM Level APP.
4-20mA and MODBUS outputs enable the continuous transmission of the measurement to analogical and digital acquisition systems. Two configurable relays can be used as local alarm threshold and pumps drive/control. One relay can be programmed as operating alarm, making RPL81 suitable for unattended applications. Constructed entirely in PP, RPL81 is particularly indicated in presence of corrosive media (acid vapors) and therefore in storage tanks. Typical applications include water
lifting and treatment plants as well as sea and rivers level monitoring.


Installation examples

Rpl81 Es d RPL81 Closed tank

– Suitable for measurements on liquids, even viscous and chemically aggressive, even with the presence of foams or vapors
– Applications where continuous measurement of the product level is required

Rpl81 Es a RPL81 Environmental monitoring of waterways

– Typically used for continuous level measurement for monitoring natural or artificial watercourses such as rivers or canals

Rpl81 Es b RPL81 Open tank

– Finds its use in continuous level measurement in tanks containing water, extremely functional even in the presence of foams
– Particularly suitable for measurements in purification plants
– Can be used in lifting and pumping stations

Rpl81 Es c RPL81 First rain tank

– Applications where level measurement is of fundamental importance
– IP68 protection suitable to withstand conditions of prolonged immersion

Rpl81 Es e RPL81 Silos and hoppers

– Can be installed where the measurement of the level of granulated products is required
– Suitable for food processes
– Useful for measuring aggregates, sands etc.

Additional information

Housing / sensor material


Mechanical installation

Threaded 2 “G; flange in PP optional

IP rating

IP67 – IP68 opt.

Electrical connection

Terminal blocks or waterproof connector IP68 (opt.)

Working temperature

-20° ÷ +60°C


max 3bar

Power supply

20÷30Vdc; 12Vdc

Power consumption

5W max; 2,5W average

Analog output

4…20mA, max 750ohm

Relays output

n°2 3A 230Vac (n.a.) resistive

Digital communication


Max measure range

0.05 ÷ 20mt
In case of non perfectly reflecting surfaces, the maximum distance value will be reduced

Blind distance

min 0,05m (suggested 0,1m)


measurement deviation ± 5mm
(if distance <250mm ± 10mm)




vers. IP67 display opt. – 2 buttons – modbus/bluetooth
vers. IP68 modbus/bluetooth


VL620/1 module (opt.) with 4 keys and LCD

Operating Manual


Data Sheet


Related Product

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