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TR150 Strain Gauge Amplifiers

Portable strain gauge amplifier and display

About the TR150 Strain Gauge Amplifiers

The TR150 is a completely portable, precision instrument packaged in a small, robust IP65 (NEMA 4) enclosure, weighing only 260 grams. The TR150 accepts an input range of up to 50 mV/V.

For simplified use, the operator only has access to six keys; on/off, gross/net, peak, trough, hold and shunt cal. Calibration and configuration can be performed from the front panel, with protection against accidental or un-intentional changes. The configuration menu is very simple and enables the setting of a tare value, display resolution, filter rate, auto power off and selection of low power mode.

There are 3 calibration options; a single pass auto-calibration, entering of load cell sensitivity and corresponding display value and entering of offset and gain values for corresponding display values.

Two separate ranges are available, which enable the instrument to read and display two separate parameters; i.e. lbs/kg, tonne/kN, high/low resolution, fast/slow response etc. The menu options offer the engineer the ability to tailor the instruments response to the application. In each range all the variables can be set, including zero and filtering.

Annunciators on the display give a constant indication of the operating mode of the TR150.

The TR150 features an innovative power saving facility which when enable can offer up to 450 hours battery life with a 350 ohm bridge connected. In normal power mode up to 35 hours battery life is achieved with a 350 ohm bridge. The TR150 also incorporates a auto power off facility, which can be set during configuration in 1 minute increments up to 99 minutes, or it can be disabled so the instrument is powered on until the off key is depressed.

The TR150 can be supplied with a number of options including a leather carry case, which enables the full operation of the indicator whilst fitted in the case. There are also a number of battery and battery charger options available.


Key features TR150

  • Handheld unit battery powered
  • 7½ digit LCD
  • Optional RS232 output
  • Size (HxWxD) 90x152x34 mm


Input Type
Strain Gauge Full Bridge Sensors
Input Range
Up ±5mV/V (±50mV/V can be supplied, with factory set option)
Non- Linearity
±0.005 % FSD
Thermal Drift
<5 ppm/K
Supply Voltage
5 VDC (±4 %), 59 mA max. current
Min. Bridge Resistance
85 Ω (4off 350Ω sensors in parallel)
Internal Battery
2 off AA size alkaline, access via sealed rear compartment
Battery Life
45 h (Typical 450 hours in low power mode), with 350Ω sensor
Update Rate
Up to 40ms (can be set in configuration menu)
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