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This remote load cell acquisition module provides measurement system for strain gauge, pressure, load cell, linear displacement and other 4 wire bridge sensors. Providing direct mV/V input and 5V bridge excitation for up to 4 load cells. The miniature T24-SA size allows for the option of embedding within the sensor housing.
Low power modes allow the T24-SA 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-SA 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 at rates up to 200 per second to other T24 devices such as handheld displays, analog outputs and base stations etc.
Although the T24-SA can be used ‘as is’ for OEM solutions there are a number of enclosure options available. The module is configured and calibrated (either by applying known inputs or by table entry) using free T24 Toolkit software which runs on a PC connected to a T24 base station.
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.
| 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 | ||||
| T24-SA | ||||
|---|---|---|---|---|
| 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 | |
| Internal Resolution | 16,000,000/24 | Resolution/bits | ||
| Noise Free where Sample Time < 10mS | 50,000/15.5 | Resolution/bits | ||
| Noise Free where Sample Time < 50mS | 65,000/16 | Resolution/bits | ||
| Noise Free where Sample Time < 100mS | 150,000/17.25 | Resolution/bits | ||
| Noise Free where Sample Time < 1000mS | 250,000/18 | Resolution/bits | ||
| Noise Free where Sample Time < 10000mS | 400,000/18.75 | 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 | |
| Environment | ||||
| Operating Temperature Range | -40 | +85 | C | |
| Storage Temperature Range | -40 | +85 | C | |
| Humidity | 0 | 95 | %RH | |
| PCB Dimensions | 40 x 18 x 7 | mm | ||
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
| T24-SA Module | Code |
|---|---|
| Strain Acquisition with Internal Antenna | T24-SAi |
| Strain Acquisition with fitting for External Antenna | T24-SAe |
| File | Date | Size | |
|---|---|---|---|
| Wireless sensing OEM module T24-SA datasheet (English) | 28-08-2015 | 922KB | |
| 3D drawing, eDrawing format, base station T24-SA PCB | 28-08-2015 | 414KB | |
| T24-SA, T24-VA and T24-IA for strain gauge, voltage and current acquisition modules manual (English) | 28-08-2015 | 1.5MB | |
| T24 telemetry systems user's manual (English) | 02-08-2021 | 12.3MB | |
| T24 Toolkit v02.15.04 software - Configuration, calibration and testing of T24 range telemetry products | 15-06-2023 | 7.0MB | |
| T24 QuickView 2.2.0 software - Data visualization and acquisition with base station T24-BSu | 15-06-2023 | 2.4MB | |
| T24LOG100 v05.20.00 software for data acquisition up to 100 wireless modules | 15-06-2023 | 14.2MB | |
| T24 Windows Drivers - Development files (DLLs, COM drivers - ActiveX, .NET, LabView) | 16-10-2018 | 6.2MB |
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