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T24-RA - Wireless Telemetry Potentiometer Acquisition Module

Image T24-RA

The T24-RA Wireless Telemetry Potentiometer Acquisition module is a high performance wireless device designed for the collection and processing of resistance related measurements. The T24-RA measures resistance and periodically transmits it.

Low power modes allow the T24-RA wireless current sensor acquisition module to ‘power down’ between transmissions or to ‘power off’ completely and can be controlled by other T24 products such as the handheld displays or a base station. The module can be configured to last several years on 2 x alkaline AA batteries or alternatively powered from 2 x NiMH or 1 x 3V Lithium.

The high accuracy, low noise measurement electronics in the T24-RA deliver high resolution, low drift results which can be user calibrated over 9 points to enable linearization and to deliver results in user definable engineering units. The results can be transmitted wirelessly to other T24 devices such as handheld displays, analog outputs and base stations etc.

Although the T24-RA modelo can be used ‘as is’ for OEM solutions there are a number of enclosure options available.

Integral antenna option offers up to 800m (2600 ft) range and external antenna options allows up to 800m (2600 ft) range in an open field site. 

The licence free 2.4 GHz direct sequence spread spectrum (DSSS) radio telemetry technology offers high integrity, error free communications which can co-exist with other wireless technologies such as Wi-Fi, Bluetooth® and Zigbee®. FCC, ETSI and IC approvals. 

Technical Specifications


General Radio

  Min  Typical  Max   Units
 Licence    Licence Exempt    
 Modulation Method    MS(QPSK)    
 Radio Type    Transceiver (2 way)    
 Data Rate    250    K bits/sec
 Radio Frequency  2.4000    2.4835  GHz
 Power    1    mw
 Integral Antenna      120 (400)  Metres (feet) *
External Antenna      800 (2600)  Metres (feet) *
Channels (DSSS)   16    
 *Maximum range achieved in open field site with the T24 acquisition module at a height of 3 metres (9.8 feet) above ground and T24-HS held at chest height pointing towards the acquisition module. Specification at 3V supply at 25°C 


Measurement Min Typical Max Units
Sensor Excitation Voltage 2.45 2.5 2.55 VDC
Input Range 500 - 100,000 Ohms
Accuracy - 0.01   % of full scale
Electical Min Typical Max Units
Power Supply Voltage 2.1 3.0 3.6 VDC
Power Supply Ripple     50 mV ac pk-pk
Power Supply Current Min Typical Max Units
Normal Mode (Non Low Power Mode)   35 65 mA
Standby / Low Power Mode   5 40 uA
Environmental Min Typical Max Units
Operating Temperature Range -40   +85 C
Storage Temperature -40   +85 C
Humidity 0   95 %RH
PCB Dimensions 16.8 x 37 x 6.5mm

   Module transmits and Receives giving: 1. Full error detection and correction 2. Ability to switch to low power modes 3. Calibration & configuration via radio telemetry 4. Ability to be switched from sleep to operating mode via radio 5. Calibration stored within the module 6. Remote battery check

Order Info

T24-RA Module Code
Potentiometer Acquisition with fitting for External Antenna T24-RAe
Potentiometer Acquisition with Internal Antenna T24-RAi