Bluetooth® Strain Transmitter OEM BoardB24-SSBX-A
Description
The B24-SSBX-A is a compact OEM Bluetooth Low Energy (BLE) transmitter module designed to provide high-quality strain bridge measurements directly to mobile devices such as phones or tablets.
Supplied as a bare board for integration into OEM systems, the B24-SSBX-A is ideal for embedded designs requiring flexible, wireless data acquisition without the constraints of a fixed enclosure. The module offers broad input sensitivity (up to ±48 mV/V) and exceptional resolution, making it suitable for a wide range of load cells, strain gauges, and other bridge sensors.
Using BLE advertising and low-power paired connections, the B24-SSBX-A can broadcast data to multiple devices simultaneously or operate in point-to-point mode. System integrators can configure, calibrate, and visualise sensor data using the free B24 app for iOS and Android, which supports dashboard creation, real-time analytics, and custom maths expressions from multiple input sources.
PIN-controlled configuration, calibration, and view permissions provide robust access control and ensure integrity in the field.
End-user license conditions apply.
Product Features & Benefits
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Bluetooth Low Energy (BLE) transmitter for strain bridge measurements
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Compact OEM module for direct strain gauge or load cell integration
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Wide input sensitivity: ±6, ±12, ±24, ±48 mV/V ranges
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High measurement resolution: up to 1 in 92,000 counts (16.5 bit at 3 mV/V), and 1 in 184,000 counts (17.5 bit at 6 mV/V)
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Broadcast or paired connection modes
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Range: 30–90 m line of sight (depending on receiving device)
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Monitor up to 12 transmitters from a single device or multiple devices
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Simple integration into custom iOS and Android apps
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Up to 3 months of continuous use at 3 samples/second (2x AA batteries)
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Advanced access control: Configuration PIN, View PIN, Calibration PIN
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Compatible with iOS and Android via free B24 app
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Operating temperature: –40 to +85 °C
- Also available in IP67 Cased format.
Specifications
| Parameter | |
|---|---|
| Strain Gauge Excitation System | 4 Wire |
| Strain Gauge Excitation Voltage (Nom) | 3 V dc |
| Strain Gauge Drive Capability | 85 to 5000 ohms |
| Strain Gauge Sensitivity | Up to ±48 mV/V |
| Offset Temperature Stability | ±5 ppm / ºC |
| Gain Temperature Stability (Max) | 4 ppm / ºC |
| Non Linearity before Linearisation | 6 ppm of FR |
| Internal Resolution | 24 bits |
| Noise free resolution @ 2.5mV/V | |
|---|---|
| At 1 sample | 14.25 bits |
| At 2 samples | 15.25 bits |
| At 3 samples | 16.00 bits |
| At 4 samples | 16.75 bits |
| Environmental | |
|---|---|
| Operating temperature range | -40 to 85 ºC |
| Storage temperature range (no batteries) | -40 to 85 ºC |
| Maximum humidity | 95% RH |
| Power Supply | |
|---|---|
| Standby(Max) | 10 μA |
| Power Supply Voltage | 2.3 – 3.6 Vdc |
| Power Supply Ripple | 50 mV ac pk-pk |
| Peak Current (1K Bridge) | 30 mA |
| Internal | |
|---|---|
| Battery supply voltage (2x AA cells) | 2.1 – 3.6 Vdc |
| Battery life at 1 sample per second | |
|---|---|
| 2 X AA cells, Transmitting 24 hr/day | 10 months |
Dimensions
25mm X 21.5mm X 3.6mm
Downloads
Videos
FAQ
| Q | What is the resolution? |
| A | Resolution is switchable in the transmitter. There are five different settings available from 14.25 bits (best battery life) to 16.75 bits (30% battery life). |
| Q | How secure is B24? |
| A | B24 employs multiple layers of PINs. If you do not know the PIN, you cannot access this level of communication. The View PIN is required to view any data from the transmitter. The Configuration PIN is required to connect to the module and change settings in it. The Calibration PIN is required to access or change calibration data. |
| Q | How do I know if the battery is low? |
| A | Depending on the batteries being used and the situation you are in, you can set a battery low threshold when configuring the transmitter. When that transmitter is then used in a project and that threshold is reached, the project will show a warning. |
| Q | What battery life can I expect? |
| A | With a pair of L91 batteries and the transmitter sending a reading every second you will be looking at approximately 10 months of life. |
| Q | How fast/slow is B24? Is it suitable for dynamic loads? |
| A | The transmission speed is selectable between 10 times per second to once every 10 seconds. Need faster – see our T24 system. |
| Q | Can the device measure tension and compression? |
| A | The analogue input is bi-directional meaning it can read negative as well as positive mV/V signals, ie a load cell in tension or compression. |
| Q | Can I use with a PC? |
| A | Yes, you can! The B24 product was designed primarily for connection to mobile devices however with the use of a suitable BT dongle and our PC drivers it is possible to develop PC based application. The technical documentation is available to allow customers to write their own software using whatever BLE interface they desire. |
| Q | Can I change the units after its been calibrated? |
| A | Yes. The B24 can be calibrated in a particular unit such as kg but can transmit its value in another weight unit such as lbs or tons for example. |
| Q | What countries can I use B24 in? |
| A | B24 is approved for wireless transmission in the following geographic areas. Europe, North America including Canada and Japan |
| Q | What sensors can I use with B24? |
| A | Any bridge based up to +/-48mV/V. The sensitivity is selectable whilst configuring. |
| Q | How much is the app? |
| A | The B24 Mantracourt app is free to download from the app store and the play store. |
| Q | Can you develop an app for my application |
| A | Talk with us about your exact requirements. |
| Q | Will it provide reports and perform logging? |
| A | You can perform limited logging. See our T24 system for further logging capacity. |
| Q | How do I copy projects to other devices? |
| A | You can export the projects and then import them into another device. This works across platforms. |
| Q | How many transmitters can I display? |
| A | We would recommend no more than 12. Need to monitor more channels – see T24. |
| Q | Why is the radio range not specified? |
| A | The range is dependent on mobile device used. See the list below or page 79 of the User Manual for further information. |
| Q | I’ve forgotten the configuration PIN for my B24 module. What can I do? |
| A | If the configuration PIN has been set and is lost or forgotten, the B24 module will need to be returned to Mantracourt Electronics in the UK for the PIN to be reset. This process ensures the security of the module’s configuration and calibration data. Please contact our technical support team for return instructions. |
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