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

Wireless Telemetry 2KHz Strain Gauge Acquisition Module
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  • Wireless telemetry 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
  • Exceptionally low power for long battery life (up to 5 years)
  • Remote power 'on' and 'off'
  • Factory calibrated measurement
  • Simple wireless configuration and calibration
  • Antenna options giving up to 200m (650 ft) range


 

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.
 

 

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 achived in open field site at height of 3 metres (9.8 feet) above ground.

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

 Module transmits and Receives giving:

1. Full error detection and correction
2. Calibration & configuration via radio telemetry
3. Ability to be switched from sleep to operating mode via radio
4. mV/V Calibration stored within the module
5. Remote battery check
6. Data Encrytion for complete security (128 bit AES)
 

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Fast miniature acquisition

Product order options

Please read the following before selecting the options for this product:

T24-SAfiCode
Fast Strain Acquisition with fitting with Internal Antenna T24-SAfi
T24-SAfeCode
Fast Strain Acquisition with fitting for External Antenna T24-SAfe

These are the following industries and applications in which this product has been used:

T24 Antenna Options

T24 Antenna Options

T24-ANTA, T24-ANTB, T24-ANTC
Wireless Telemetry Acquisition Enclosure

Wireless Telemetry Acquisition Enclosure

T24-ACM
Wireless Telemetry Acquisition Enclosure

Wireless Telemetry Acquisition Enclosure

T24-ACMi
Wireless Telemetry Analogue Output Module

Wireless Telemetry Analogue Output Module

T24-AO1
Wireless Data to Relay Output

Wireless Data to Relay Output

T24-RM1
Wireless Telemetry Printer

Wireless Telemetry Printer

T24-PR1
Wireless Telemetry Handheld Display Single Input

Wireless Telemetry Handheld Display Single Input

T24-HS
Wireless Telemetry Handheld Display Unlimited Inputs

Wireless Telemetry Handheld Display Unlimited Inputs

T24-HR
Wireless Telemetry Handheld Display Multiple Inputs

Wireless Telemetry Handheld Display Multiple Inputs

T24-HA
What are the sampling rates of the acquisition modules?

The T24 standard acquisition modules (SA, IA, VA) sample from 0-200Hz. The T24 fast acquisition modules are fixed at 2KHz.

What is the resolution of the acquisition modules?

The noise free resolution for a sample time of 10 milli-seconds or less is 15.5 bits for the T24 SA, 12.5 bits for the T24-VA and 12.25 bits for the T24IA. With increased sample times resolution can be increased up to 18.75 bits for the T24-SA.

What is the supply voltage for the acquisition modules?

3V for the acquisition modules and handheld displays. Other modules in the range take 9-36 V

What is the difference between the T24-SA and T24-SAf?

The standard acquisition modules are capable of providing data up to 200Hz. The ‘fast’ T24-SAf provides data at a fixed 2Khz.

What is the difference between the ‘i’ and ‘e’ versions of the

A: The ‘i’ modules (T24-SAi, T24-SAfi, T24-VAi, T24-IAi) all feature an on chip
integrated antenna. The ‘e’ modules (T24-SAe, T24-SAfe, T24-VAe, T24-IAe) are
fitted with a miniature UFL connector which can be used with either of the antenna options available (the T24-ANTA pcb antenna or T24-ANTB stub antenna).
 

How are the strain gauge acquisition modules calibrated?

A: The modules are factory calibrated to 2.5 mV/V which can be custom calibrated up to 9 points by using the T24 Toolkit.

How are the modules powered?

A: Standard AA batteries or the T24-BC1 Battery Charger which provides a re-chargeable power supply

Contact Us

t: +44(0) 1395 232020
e: info@mantracourt.co.uk

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