Wireless Current Transmitter | 0-20mA / 4-20mA Sensor Input | T24-IA

Miniature, High Speed, Wireless Current Sensor Transmitter

  • Lead Time: 1 week
T24 Wireless OEM PCB Modules

At a Glance

  • 2.4GHz Operating Frequency (Licence Free)
  • Range: up to 600m (internal antenna) / up to 800m (external antenna
  • 0-20mA Current Input
  • Resolution up to 30,000 divisions
  • Very Low Power Consumption
  • Wireless Monitoring for your 4-20mA and 0-20mA Sensors  
  • Miniature PCB Ideal for OEM Integration
  • High Speed Updates at 200 per Second
  • Simple Wireless Setup
  • Fantastic Wireless Transmission Range – Up to 800 metres! 


The T24-IA wireless current transmitter module enables high accuracy wireless measurement of signals from 0-20mA and 4-20mA current output sensors such as pressure transmitters, LVDT displacement sensors and level/depth sensors.

Transmission ranges of up to 600 metres are possible using the internal antenna, while the use of an external antenna increases transmission range up to 800 metres.

The T24-IA wireless current transmitter module requires a power supply of just 3Vdc to operate which is typically provided by 2x ‘AA’ batteries and provides a highly stable, high resolution signal that can be received by any of the T24 range of 2.4GHz telemetry instrumentation.

Output rates of up to 200 readings/second are possible at a noise-free resolution of 1 in 5000, increasing to 1 in 30,000 at a reduced output rate of 1 reading/second or less.

The compact T24-IA transmitter module can be integrated into load cells and other sensors if sufficient space is available.  Alternatively, it can be mounted into either the T24-ACM(2x ‘D’ size batteries) or T24-ACMi (2x ‘AA’ size batteries) battery-powered modules to complete your wireless sensor.

Please contact our expert sales team using the form in the sidebar, call us on +44 (0) 1189 817339, or send an email to info@appmeas.co.uk and we will be happy to assist you with your enquiry.

Technical Specifications

LicenceLicence Exempt
Modulation MethodMS (QPSK)
Radio TypeTransceiver (2 way)
Data Rate250K bits / second
Radio Frequency2.42.4835GHz
Channels (DSSS)15
*Tests conducted in an open field site with the transmitter at the top of a 3m pole. The receiver was mounted 1.5m off the ground.
Input Range Sensitivity (FR)0-21mA
Calibrated Range4-20mA
Gain Temperature Stability-50ppm /˚C
Offset Temperature Stability0.5ppm /˚C
Non Linearity before Linearization525ppm of FR
Internal Resolution16,000,000 / 24Resolution/Bits
Input Impedance-47-Ohms
Input Calibration Accuracy--0.1%FR
Noise Free where Sample Time < 10mS5,000 / 12.5Resolution/Bits
Noise Free where Sample Time < 100mS6,000 / 12.75Resolution/Bits
Noise Free where Sample Time < 1000mS10,000 / 13.25Resolution/Bits
Noise Free where Sample Time > 1000mS30,000 / 14.75Resolution/Bits
Transmission RatesFrom 5 ms to 1 day
Excitation Available5 Vdc @ 50 mA
Power Supply
ACMi and OEM Module2.13.6Vdc
Normal Mode on Constantly4045mA
Standby Mode / Low Power Mode520uA
Battery Life - Transmitting results at 3 per second, no excitation requiredUsageBattery Life
Pair AA cellsConstantly on1 month
Pair AA cells12 sessions per day of 5 minutes2 years
Pair DD cellsConstantly on4.5 months
Pair DD cells12 sessions per day of 5 minutes>9 years
Operating Temperature Range-2055°C
Storage Temperature Range (no batteries)-4085°C
IP Rating (ACM and ACMi)IP67/Nema4
Wireless Range / m800m (2,600 ft)500m (1,600 ft)
Power Supply3-18 Vdc or 2xD cell3 Vdc (2xAA)3 Vdc (2xAAA with BB1)
Battery Life at 1 transmission per second*1 year5 months2 months
AntennaANTAANTAPCB Printed
Radio Frequency2.4 GHz
Operating Temperature /˚C-20 to +55-20 to +55-40 to +80
Environmental ProtectionIP67IP50
Module Size / mm164 x 84 x 5780 x 62 x 3476 x 35 x 20
Software & ConfigurationT24 Toolkit & T24LOG100

Product Dimensions

T24-IA Wireless Current Transmitter Module Outline Drawing

Ordering Codes & Options

T24-IAeWireless Radio Telemetry Current (4-20mA) Acquisition Module + external antenna (must be ordered separately)
T24-IAiWireless Radio Telemetry Current (4-20mA) Acquisition Module + internal antenna