ATEX / IECEx Telemetry Strain Transmitter Module (X24-ACMi-SA)


  • Approved for use in explosive atmospheres Zone 1, Zone 2
  • 800 m (½ mile) range
  • Long battery life: 2 years at 12 sessions of 5 minutes per day; 30 days continuous
  • High accuracy, extremely low temperature drift
  • High resolution ratio-metric/bridge measurement
  • Up to 1 part in 400,000 (18.75 bits) noise free resolution
  • Bipolar input, up to ±3.2 mV/V
  • Calibration and linearisation to engineering units
  • Capable of driving 4 X 350 R load cells
  • Up to 200 Hz transmission rates
  • 5 V bridge excitation
  • Compatible with X24 receiver and T24 receivers
  • OEM option available with X24-SAe module
  • Efficient omnidirectional antenna removes requirement for external enclosure antenna
  • Environmentally sealed to IP67 in robust enclosure
  • Operating temperature range of -20 °C to +50 °C
  • 80 mm X 62 mm X 34 mm (Not including cable gland)
  • Uses readily available Energizer L91 batteries
SKU: X24-ACMI-SA Category: Tag:


ATEX / IECEx telemetry transmitter module measures strain input and periodically transmits data for receipt by X24 or T24 receivers.
High accuracy ratio-metric input allows for calibration and linearisation for pressure, force, torque and weight measurement in explosive atmospheres.
Housed in an environmentally sealed IP67 enclosure with battery holder for two Lithium Energiser L91 AA batteries.
This flexible transmitter supports a wide range of bridge sensors and is ideal for places that are difficult for a wired connection.


TitleVersionSizeHitsDate addedDownload
X24-ACMi-SA Product Sheet332.17 KB70924-05-2021 DownloadPreview
X24 Manual01.02a7.02 MB68825-05-2021 DownloadPreview
Read T24LOG100 Overview224.07 KB66824-05-2021 DownloadPreview
Download T24 Toolkit Software02.10.097.69 MB23325-05-2021 Download
T24 Log100 Setup5.9.0014.94 MB23825-05-2021 Download
ATEX Quality Assurance Notification236.24 KB29314-02-2023 DownloadPreview

Q. What is the battery life of the X24 range?
A. Battery life is comparable with the T24 range and the battery calculator found here will give an idea of what to expect.

Q. What are the different ATEX zones?
A. Zone 0 – Permanently or frequently hazardous over long periods.

Zone 1 – Occasionally hazardous.

Zone 2 – Rarely or temporarily hazardous

Safe Zone – No hazard

Q. Can I use any AA batteries in the X24 devices?
A. No! The devices are all ATEX certified only with Energiser L91 lithium AA batteries. Fortunately these are readily available around the world.

If you are using the OEM board, refer to the manual for power supply requirements.

Q. Can I change the batteries in Zone 1 or Zone 2?
A. No! The device needs to be moved to the safe zone before changing batteries.

Q. The X24-HD looks complicated – is there a simpler option?
A. Its only as complicated as you make it. Out of the box you just need to select the group key and radio channel to receive all X24/T24 transmitters in that group.

Q. What sound level does the buzzer emit?
A. The buzzer used for overload indication and keypad feedback has an output level of 45 dBA.

Q. Is logging function available on the handheld?
A. Currently the X24 has no logging feature

Q. Do you need a QAR/QAN if wiring the X24-ACMi-SA cased transmitter to a suitably approved ATEX/IECEx sensor?
A. No, providing the instructions in the manual are followed and the ‘specific conditions of use’ (ATEX) or the ‘conditions of certification’ (IECEx) are adhered to.

Q. Are the same batteries needed for the X24-SAe if battery powering?
A. Providing the batteries have the required component approval then the choice of batteries need not be limited to the Energizer L91 Lithium Batteries

Q. Are there any limitations on resistance of the bridge?
A. The resistance of the strain gauge can be between 85 and 5000 ohms.

Q. Is the Strain gauge input suitable for both tension and compression load cells?
A. The strain gauge measurement is bi-directional ranging from -3.2mV/V to +3.2mV/V making it suitable for tension and compression load cells.

Q. Is it possible to setup the transmitter inside the EX area?
A. No, you would need to take the equipment out of the EX area to set it up or change the batteries.

Q. Is the X24-SAe available only with an ANT-A?
A. That is correct, the T24-Sae is permanently connected to the ANT-A antenna. The cable has a fixed cable length of 45 mm

Q. Will the X24-ACMi work with a special battery pack?
A. It is only certified to be used with internal AA Energizer L91 batteries.

Q. Is the system capable of handling a 4 load cell weighing system or only one load cell?
A. The resistance of the strain gauge can be between 85 and 5000 ohms. The X24-SAe can support up to four 350 ohm strain gauges bridges attached in parallel (At the expense of reduced battery life).