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Model UPC Power Sensor - Watt Transducer with HP Horsepower and kW Field Scaleable Calibration

Measurement of kW and HP of AC & DC motor loads

  • Measurement of kW and HP Horse Power (746 watts)
  • Sensing of Pump or Fan Flow pressures
  • Sensing Correct Mixture Viscosity, Polymers, Cements and Concretes
  • Optimum Feed Rates Machine Tools
  • Tool Condition, Tool Contact
  • Beginning or End of Process
  • Obstructions, minimizing damages
  • Overload sensing of processes from motor HP
  • Loss of Load and overload
  • Current Connection is non contact
  • UL Approved and CE CA
UPC AC Power Sensor
Power Monitoring Made Easy
General Information

UPC Model

Adjustable HP Capacity kW Power Sensor

  • Monitor motor power in watts with DUAL analog outputs for meters, programmable controllers, chart recorders
  • Adjust full scale to match your motor – Max sensitivity from small motors clear up to 150HP
  • Self-contained – No PTs or CTs, easy and safe to install
  • Versatile – Works on both Fixed and Variable Frequency Drives, even Single Phase and DC

UPC-LB Model

Special Purpose kW Power Sensor

  • For wires up to 0.9″ (23 mm) diameter
  • Larger Holes
  • Nearly 50% more area than a standard UPC

UPC Three Phase Power Sensor Specifications

Accuracy 0.5% Full Scale * * * *
Full Scale Capacity 5HP** to 150HP * * 5HP to 150HP larger 0.9" holes 3KW** to 100KW
  • 4-20mA, 500Ω max connected impedance
  • 0-10V DC 2000Ω minimum load
* *
  • Relay: 30V, 5mA mx, 50ms duration pulse
  • 0-10V DC
3KW** to 100KW
Response Adjustment 0.5 Sec to 12 Sec * .050 Sec to 1.2 Sec * KWH, KWM, KWS
Frequency 3Hz to 1kHz * * * *
Power Comsumption 6VA at 120V 1VA at 230V * * *

*Specifications same as UPC unless noted

**For smaller motors take extra "turns" (Example: A 10HP unit is reduced to 5HP by taking two turns through each hole. It is reduced to 3.33HP with three turns, etc.

universal power cell
The UPC Power sensors use balanced Hall Effect Sensors
  • Sensitive at low and high frequencies
  • Fast Response
  • Linear output
  • Senses distorted waveforms
  • Noise immune
  • Accuracy is improved by eliminating the large phase shift errors from the CT's and PC's at low power factors

Balanced Hall Effect sensors are used to measure power in kW and HP with non sinusoidal shapes and frequencies (like VFD Variable Frequency Drive). A Hall Effect sensor has these 2 characteristics:

  • It detects a magnetic field which is proportional to the current flowing through the conductor
  • The Hall Effect semiconductor can multiply two signals. Each Hall Effect Sensor is powered from voltage measured in each phase. The Hall device multiplies these voltage and current signals in real time

To Order:

Specify Model Number, (Voltage Network if not 460 Volts)
and output type (like 4-20mA)

Outputs Available:

0-1mA, 4-20mA, 0-5 Volts, 0-10 Volts the output is
powered by the Power Cell

UPC kW and AC Power Sensors

You can assess the kW load on an electric motor by measuring the electric current flowing to the motor (Amps). Typically this is not an ideal way since a lightly-loaded motor does not use the electricity very efficiently. In other words, the power factor is low.

A better way to understand the load is to measure the electrical motor power, measured in Horsepower or Watts. Motor power has a straight line relationship, so it works well even when the motor is lightly loaded.

Our UPC AC Power Sensors measure the motor load (Horsepower or Watts) and send an analog signal to meters, data acquisition equipment, computers or PLCs. Using this method, the operator can see load status allowing the controlling PLC or computer to make decisions.

The typical way to measure power, with non sinusoidal wave shapes is fairly complex. However our CE marked UPC range of Power Sensors offers customers a simple solution.

A Powertek UPC Power sensor measures motor power in kW. In addition, it has built-in relays and set points, which means the user can adjust the set point, if the motor load reaches the set point, a relay will trip. The relay acts as a switch and is used to turn on/off the machine, sound an alarm, or adjust the machine feed rate.

universal power cell