Wireless Telemetry 2 KHz Strain Gauge Acquisition Module (T24-SAf)

Wireless Telemetry 2 KHz Strain Gauge Acquisition Module (T24-SAf) This acquisition module provides high speed measurement of strain gauge, pressure, linear displacement and other strain gauge based sensors including loadcells.  The small module size allows for the option of embedding it within the sensor housing. Low power modes allow the […]

Wireless Telemetry 2 KHz Strain Gauge Acquisition Module (T24-SAf)

This acquisition module provides high speed measurement of strain gauge, pressure, linear displacement and other strain gauge based sensors including loadcells.  The small module size allows for the option of embedding it within the sensor housing.

Low power modes allow the module 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 speed electronics deliver low drift results which are transmitted at a rate of 2000 readings per second to other T24 devices such as analog outputs and base stations etc.

Although this module can be used ‘as is’ for OEM solutions there are a number of enclosure options available. See ‘Related Products’ tab.

Integral antenna option offers up to 100m (325 ft) range and external antenna options allows up to 200m (650 ft) range in an open field site. The module is configured using free T24 Toolkit software which runs on a PC connected to a T24 base station.

The licence free 2.4GHz direct sequence spread spectrum (DSSS) radio 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.

To view a selection of suitable antennas click here. This pcb is also available in a selection of IP rated enclosures to provide housing and powering. See T24-ACM-SAf, T24-ACMi-SAf and T24-ACMm-SAf

  • Wireless acquisition module for strain gauge based sensor measurements such as load cells
  • Ultra fast update rate of 2000 per second
  • Miniature PCB for fitting inside sensors
  • Low power for long battery life
  • Remote power ‘on’ and ‘off’
  • Fixed factory calibrated measurement in nV/V (nanovolts per volt)
  • Simple wireless configuration
  • Antenna options giving up to 200m (650 ft) range
  • Only one T24-SAf supported per radio channel
  • 1 years manufactures warranty

T24-SAf

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 100 (325) Metres (feet) *
External Antenna 200 (650) 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

T24-SAf
Specifications with 1000R bridge, 2.5mV/V, at 3V supply at 25 Deg C
Strain Gauge Excitation System 4 wire
Strain Gauge Excitation Voltage 4.5 5 5.25 VDC
Strain Gauge Drive Capacity 85 – 5000 Ohms
Maximum Gauge Sensitivity (FR) 3.2 ±mV/V
Offset Temperature Stability 1 4 ppm/C
Gain Temperature 3 5 ppm/C
Offset Stability with Time 20 80 ppm of FR (1)
Gain Stability with Time 30 ppm of FR (2)
Non Linearity before Linearization 5 25 ppm of FR
Noise free resolution (10 Second Sample) 8000/13 Resolution/bits
Electrical    
Power Supply Voltage 2.1 3.0 3.6 VDC
Power Supply Ripple 50 mV ac pk-pk
Power Supply Current    
Normal Mode (1K Bridge) 60 65 mA
Standby/Low Power Mode 5 20 uA
Power Supply
Active 35 40 mA
Sleep Mode (1K Bridge) 5  20 mA
Estimated Battery Life using 24hr batteries:
Standby Mode (Powered off) 1.5 Years
Continuous Operation 40 Hours
Environment    
Operating Temperature Range -40 85 C
Storage Temperature Range -40 85 C
Humidity 0 95 %RH

 

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