Wireless Sensor Transmitter Potentiometer AcquisitionT24-ACMi-RA
£453.00
Description
The T24-ACMi-RA is a compact wireless transmitter module housed in a rugged IP67-rated enclosure, designed to collect and transmit resistance-based measurements from linear or rotary potentiometers, displacement transducers, and position sensors. This version features the ACMi enclosure, which includes an internal battery compartment for two AA alkaline cells and sealed screw terminal connectors for straightforward wiring and environmental protection.
Transmitting over a licence-free 2.4 GHz DSSS radio frequency, the T24-ACMi-RA delivers secure, interference-resistant data with a wireless range of up to 800 metres (2,600 feet) in open field conditions using its integral antenna. The module is compatible with the full range of T24 receivers, including handheld displays, base stations, analogue and relay output modules, and PC interfaces, allowing flexible integration into industrial and OEM systems.
Designed for ultra-low power operation, the device can remain in the field for extended periods without intervention. Low-power modes and remote wake functionality allow efficient energy use, enabling battery life to span several years depending on the transmission rate and duty cycle. The unit supports configurable transmission rates from once per minute to 200 times per second.
Calibration and configuration are handled wirelessly using the T24 Toolkit software and a T24 base station, with all settings stored internally on the module. The device includes full error detection, remote battery monitoring, and 128-bit AES encrypted data for reliable and secure operation.
Typical Applications
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Linear actuator and valve position monitoring
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Remote displacement measurement and travel monitoring
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OEM integration in mobile equipment or industrial machinery
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Test and calibration rigs
Module transmits and receives, offering:
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Full error detection and correction
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Calibration and configuration via radio telemetry
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Ability to be switched from sleep to operating mode via radio
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mV/V calibration stored within the module
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Remote battery check
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Data encryption for complete security (128-bit AES)
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.
Product Features & Benefits
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Wireless transmitter for resistance-based sensors such as potentiometers and displacement sensors
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Compact IP67-rated ACMi enclosure with integral antenna
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Wireless range up to 800 m (2,600 ft) line-of-sight
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Internal compartment for two AA alkaline batteries
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Screw terminal connectors for easy, sealed sensor wiring
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Operates on licence-free 2.4 GHz DSSS radio for reliable, interference-resistant communication
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Compatible with all T24 receivers including handhelds, base stations, analogue and relay modules
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Configurable transmission rates from 1 per minute to 200 per second
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Ultra-low power consumption with support for remote sleep and wake control
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Long battery life — years of operation depending on usage
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Wireless configuration and calibration via T24 Toolkit software
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Calibration data stored in-module for fast and consistent deployment
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Full error correction and 128-bit AES encrypted transmission for data integrity and security
Specifications
| Measurement Specifications | |
|---|---|
| Input range | 500 to 100,000 Ω |
| Sensor excitation voltage | 2.5 Vdc |
| Offset temperature stability (max) | 0.5 ppm/ºC |
| Gain temperature stability (max) | 50 ppm/ºC |
| Accuracy | 0.01% of FR |
| Non linearity before linearization (max) | 25ppm of FR |
| Internal resolution/Bits | 16,000,000 / 24 |
| Transmission rates | From 5ms to 1 day |
| Environmental | |
|---|---|
| Operating temperature range | -20 to 55 ºC |
| Storage temperature range (no batteries) | -40 to 85 ºC |
| Maximum humidity | 95%RH |
| Environmental protection with suitable cables existing through cable glands | IP67 |
| Power Supply | |
|---|---|
| ACMi | 2.1 to 3.6 Vdc |
| Battery Life, Based on transmitting results at 3 per second | No excitation required |
|---|---|
| Pair AA cells constantly on | 1 month |
| Pair AA cells 12 sessions per day of 5 mins | 2 years |
| Radio | |
|---|---|
| Radio type | Licence exempt transceiver |
| Radio frequency | 2.4 GHz |
| Transmit power | 10 mW |
| Range | Up to 800m |
Dimensions
80mm X 62mm X 34mm (Not including cable gland)
Downloads
T24 Wireless Telemetry User Manual V.01-15
T24 Wireless Telemetry Toolkit
100 Channel Logging & Visualisation Software (T24LOG100)
T24 Enclosure Comparison Sheet
White Paper – A Guide to Effective T24 Wireless Telemetry Installation
Technical Guide – Carrying Out a Wireless Site Survey
White Paper – Getting The Best From Wireless Instrumentation
FAQ
| Q | What excitation ranges does the T24-PA provide? |
| A | The T24-PA transmitter module provides a range of excitations of 3, 5 and 12 volts |
| Q | What types of inputs can be used? |
| A | Any volt free contact input such as relays, voltage sources (up to 24 volts) and NPN open collector inputs. |
| Q | What measurement modes are available? |
| A | Selectable measurements include: frequency, count, quantrature, mark (space), digital state, RPM and interval |
| Q | How accurate is the measurement? |
| A | At a slow input rate of 1Hz the accuracy is 0.15% and at 3Hz the accuracy is 0.25%. Just under half this error is to allow for temperature drift over the full operating temperature range of the T24-PA device (-40 to +85 degrees) so the accuracy in a stable temperature environment is far better. |
| Q | How do I calibrate the output? |
| A | The T24-PA is factory calibrated to the nearest 0.25 μS which provides users with a set of predefined outputs; Hz, RPM and Period. All of these values can have a custom gain and offset applied to them, the resulting output can therefore be in whatever units or range of values you require. |
| Q | What is the counter, and its maximum value? |
| A | The counter is a counter which increments every time a pulse is detected either on rising or falling edge which can be set in the tool kit. The maximum value for the counter is 4,294,967,295 at which point the counter will overflow. |
| Q | How do I reset the counter value of the T24-PA? |
| A | The counter value can be reset either by contacting the digital input to the ground or by transmitting a data packet with a defined data tag from another device, such as a T24-HA, T24-RM1 or even another T24 transmitter module. This can also be achieved with a power cycle. |
| Q | What software is provided with the T24 devices? |
| A | All devices are supported by the T24 Tool Kit which allows users to configure all devices from the T24 range as well as view and log data from transmitters modules in range. The software can also be downloaded directly from our website. |
| Q | How many devices can operate on one radio channel? |
| A | Many devices can operate on the same radio channel depending on the sample rate of the transmitter modules present in the system. The radio channel is capable of supporting up to 200 data packets per second. |
| Q | Can PC software gather data from many devices? |
| A | Yes, Mantracourt provides freeware for logging up to 100 inputs to one base station, in addition the free Windows DLL and COM driver can be used to gather data through a customer’s own PC software. |
| Q | What limits the RF range of the devices? |
| A | Any metal surface will reflect 2.4 GHz radio waves, therefore in a sealed metal box, no RF will escape. However by providing a suitable RF window the signals will propagate out. Water and concrete also limit the RF range. |
| Q | What Frequency does the system operate on? |
| A | Licence free world wide 2.4GHz, although this frequency is used by other equipment, the T24 range has been tested with Bluetooth, Zigbee & WiFi devices without conflicts. |
| Q | Is it possible to use wireless range extenders within T24 network? |
| A | The T24-AR wireless range extender which can be added to the system can propagate a signal around corners and obstacles. This unit can also double the effective range – but only once. |
| Q | Is the system point to point? |
| A | Yes, however the modules may also operate in many to one (such as multiple data transmitters modules communicating with a base station) and one to many (such as a data transmitter module supplying data to multiple handhelds and displays). |
| Q | What is the communication protocol |
| A | Proprietary protocol based on a 802.15.4 chip. This allows the T24 range to co-exist with Bluetooth, Zigbee & WiFi devices without conflicts. |
| Q | What are the sampling rates of the transmitter modules? |
| A | The T24 standard transmitter modules (SA, IA, VA, RA, TA, PA) sample from 0-200 updates/sec. The T24-SA fast transmitter modules are fixed at 2,000 updates/sec. |
| Q | What is the resolution of the transmitter modules? |
| A | 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, 14 bits for the VA and 12.25 bits for the T24IA.
The T24-PA’s accuracy % input error @ 1 Hz is 0.15% and for the T24 RA the accuracy is 0.01% of the full scale. With increased sample times resolution can be increased up to 18.75 bits for the T24-SA. |
| Q | Can power be provided to a sensor? |
| A | Yes, all transmitter modules feature a 5V supply which is a excitation voltage (with exception of T24-RA which has 2.5V supply). |
| Q | What is the required power supply for the T24-PA? |
| A | This depends on the enclosure used – see options below:
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| Q | What is the difference between the “i” and “e” versions of the transmitter units? |
| A | The ‘i’ modules all feature an on-chip integrated antenna. The ‘e’ modules are fitted with a miniature UFL connector which can be used with any of the antenna options available; the T24-ANTA (PCB antenna) or T24-ANTB (fixed 90 degree Whip antenna) or T24-ANTC (flexible whip antenna) or T24-ANTD (‘puck’ antenna fitted with a 0.6m cable and RPSMA connector and supplied with a 100 mm RPSMA to UFL adaptor cable) or T24-ANTE (‘puck’ antenna fitted with a 100 mm cable and UFL connector) |
| Q | How many transmitter modules can be acquired by the base stations? |
| A | Each base station can use one of 15 channels. From that selected channel a base station can collect data simultaneously from any number transmitter modules depending upon the frequency of readings being provided by the transmitter module. |
| Q | What are the input ranges of the T24 transmitter modules? |
| A | T24-SA 2.5mV/V calibrated strain gauge based measurement; T24-VA 0-10V, T24-IA 4-20mA, T24-TA pt100 sensor input, T24-RA potentiometer 500 to 100000 Ohms and T24-PA 0.5Hz to 3kHz. |
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