The Unipower APM110E DIN rail mounted analogue power meter provides positive protection against dry running, cavitation, overload and valve closure.  By measuring true power the unit will provide a signal to shut down the pump at two predetermined points, usually corresponding to pump maximum and minimum safe flow. A delay timer can be set to avoid nuisance trips, for example when first starting the pump.

This monitor has been proven many times and is offered by many pump manufacturers.  (Please do not confuse this with inferior current monitors which are more difficult to set up and can be problematic).

Motor voltage range 3 X 380-550Vac (Other voltages available on request).
Motor FLC range 0.1 - 80 Amps direct, use CT's above 80A.
0-10v reference output proportional to set kW range. Connecting a digital volt meter to this will assist in setting up and monitoring.
Start up surge Timer, Reaction timer for Max. & Min. limits
Input for auto or manual reset
Input for Max. alarm inhibit, Input for Min. alarm inhibit
LED's indicate; Max. alarm, Min. alarm, Start Timer active, Reaction timer active, Load detected
DIN rail mounting
24V dc auxilliary supply 

Price:   £ 219.60 each monitor only + VAT  Delivery from Stock

The unit above unit is located in the control panel and can be used by itself or with the PCU D10 display and control unit which is panel mounted.

The PCU D10 gives display of True Power in kW, kW% & HP
Under & Over load alarm levels set with push buttons
Start up surge Timer Reaction delay Timers set with push buttons
Analogue output proportional to power
Tamper proof key-lock mode
72 x 72mm panel mounting
Powered from APM110E  Delivery from Stock

Price:   £ 163.00 each + VAT 

Manufacturers literature        Technical information

APM110E Instructions (pdf 2.2MB) PCU D10 Instructions (2.25MB)

Supplementary Instructions Specific to Pumps explains how and why the APM110E works so well and how to set trip limits and timers for centrifugal pumps.  (pdf 600kb)