The Unipower HPL 110 DIN Rail mounted digital 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 the pump maximum and minimum safe flow.  A delay timer can be set to avoid nuisance trips, for example when starting the pump or transient conditions.

This monitor has been proven many times in service and is offered by many pump manufacturers.

Maximum and minimum alarms
1 x SPCO relay signals both alarm conditions
Start up surge Timer, Max. and Min. alarm reaction delay Timers
Auto or manual reset, Programmable reset Hysteresis (auto-reset)
Input for alarm inhibit
Tamper proof mode
DIN rail mounting
Self powered from supply - Supply voltage 3x380-440Vac, others available

Suitable for up to 8 amp FLC, above this use with Current transformer (see below)

Price:   £ 323.00 + VAT   Delivery from Stock

Manufacturers literature         Instructions

Supplementary Instructions Specific to Pumps explains how and why the HPL110 works so well and how to set trip limits and timers for centrifugal pumps (pdf 600kb)

HPL 110A digital monitor is generally as described above, but for panel mounting 72mm x 72mm.

This is especially suitable for easy access and reset (no additional reset button is needed on your panel door).  The setting parameters can be locked to avoid tampering. Delivery 2/3 days 

Price:   £378.00 + VAT

CT 15:5 Current Transformer Delivery from Stock

Price £ 19.60 + VAT

CT 30:5 Current Transformer Delivery from Stock

Price £ 22.14 + VAT

Others available on request from 10 to 1000amps - see epumpshop for details