Sensit Wearable
Potentiostat for wearable biosensors
- Accelerate the development of your wearable sensor
- Works wireless and autonomous, battery powered
- Measure up to two different analytes using two working electrodes
- Use with PSTrace software for Windows
- Smooth start with the development kit
You'll usually get an answer to your quotation request within one business day.
Description
The Sensit Wearable reduces the time-to-market for new electrochemistry-based wearable sensors. Wearable, flexible electrochemical sensors, for instance integrated on the epidermis, can be used to measure non-invasively metabolites and electrolytes for various biomedical applications.
Possible applications
- Continuous Glucose Monitoring
- Sweat analysis for athletes
- Molecular biomarkers
Techniques and software
The Sensit Wearable supports most common electrochemical techniques, including Cyclic Voltammetry, Square Wave Voltammetry and Impedance Spectroscopy (FRA/EIS). The Sensit Wearable runs autonomously for hours up to weeks, executing a MethodSCRIPT while powered from a battery, and saving data to onboard storage. Control the Sensit Wearable wirelessly or with USB using the Android app PStouch (available on my.palmsens.com), or using our PC software PSTrace.
Key electrochemical specifications
The Sensit Wearable is built around the EmStat Pico Core potentiostat chip.
- Capable of EIS up to 200 kHz
- Potential range -1.7 to +2 V
- Current ranges 100 nA – 5 mA (max ±3 mA)
Kit contents
The Sensit Wearable comes with:
- Sensit Wearable reader
- Evaluation board with mounting bracket, including
- Cell cable
- Crocodile clips
- Accessories for various wearing options
- Two example mounting brackets
- Velcro strap with mounting bracket and universal SPE connector
- Quick Start document
- PSTrace software for Windows and PStouch software for Android
Specifications
| General | |
|---|---|
| Full dc-potential range
The maximum potential difference, that can be applied between WE and RE.
|
-1.7 to +2 V |
| Dynamic dc-potential range [1]
The maximum potential difference, that can be applied between WE and RE.
|
2.2 V |
| Compliance voltage | -2.0 to +2.3 V [2] |
| Maximum current | ± 3 mA |
| Max. data acquisition rate (datapoints/s) | 1000 |
| Supports FRA/EIS | Yes |
| [1] The dynamic range is the range that can be covered during a single scan within the full potential range. For example; a linear scan can start at -1.5 V and end at 1.1 V or vice versa, covering 2.6 V dynamic range. [2] The compliance voltage is the maximum potential between Working and Counter electrode and depends on the selected mode.
The compliance voltage is the maximum voltage that can be applied between the working and counter electrode. Another name could be the maximum cell potential. Continue reading
|
|
| Potentiostat (controlled potential mode) | |
|---|---|
| Channels |
1 channel (2x WE, 1x RE, 1x CE) |
| Applied dc-potential resolution | 537 µV |
| Applied potential accuracy | < 0.2% |
| Current ranges | 100 nA to 5 mA (10 or 12 ranges, depending on the mode) |
| Current resolution | 0.006% of selected current range (5.5 pA on 100 nA range) |
| Current accuracy |
< 0.5 % of current ±0.1% of range |
| Measured potential resolution (for OCP) | 56 uV (for OCP) |
| FRA / EIS (impedance measurements) | |
|---|---|
| Frequency range | 0.016 Hz to 200 kHz |
| Ac-amplitude range | 1 mV to 0.25 V rms, or 0.708 V p-p |
| Electrometer | |
|---|---|
| Electrometer amplifier input | > 1 TΩ // 10 pF |
| Bandwidth | 250 kHz |
| Other | |
|---|---|
| Power | USB-C and Battery |
| Communication | USB-C and Wireless communication BLE 5.0 |
| Storage | 14 MB for storing >450k datapoints |
| Size | 35 x 35 x 12 mm (including the mounting bracket) |
| Weight | 10 g |
| Battery |
Rechargeable 50 mAh / 0.2 Wh. Battery life 2 hours up to weeks, depending on the MethodSCRIPT. See power consumption below. |
| Auxiliary port | 1 Auxiliary pin, used by default for internal NTC temperature measurement. |
| Sensor connector | Via 6 spring-pin mounting bracket, or connect a regular SPE using the sensor break-out board |
| Operation temperature range | 0 °C to +40 °C |
| Power consumption | ||
|---|---|---|
| off | 0.1 mW | 75 days |
| idle or measuring | 92 mW | 2 hours |
| sleep with Bluetooth connected | 1 mW | 7.5 days |
| sleep without Bluetooth connected | 0.3 mW | 25 days |
| sleep with 10 mW bias potential applied on WE1 | 4.44 mW | 40 hours |
| EIS Accuracy Contour Plot |
|---|
 |
Software
PSTrace
PSTrace is designed to be productive immediately after installation, without going through a long learning period. The software allows for getting the most out of the Sensit Wearable with only a few click. Besides controlling the Sensit Wearable directly via USB or Bluetooth, it allows for generating scripts to run on the Sensit Wearable which include:
- Repeating measurements at fixed intervals
- Storing measurement data on the Sensit Wearable internal storage
- Going into low-power hibernation mode
- Waking up after time period or tapping on the Sensit Wearable
After measurement data has been collected with the Sensit Wearable running autonomously, just connect the Sensit Wearable to your PC or laptop and load it into PSTrace for further analysis.
PStouch
PStouch is an app for Android devices compatible with all PalmSens, EmStat and Sensit potentiostats. The app connects to your potentiostat via USB (depending on the Android device) or via Bluetooth.
PStouch features include:
- Setting up and running measurements
- All files compatible with PSTrace
- Analysing and manipulating peaks
- Sharing data directly via e-mail, Dropbox, or any other file sharing service
Get it on MyPalmSens
MethodSCRIPT™ Communications Protocol
The Sensit Wearable works with MethodSCRIPT™, giving you full control over your potentiostat. The simple script language is parsed on-board, which means no DLLs or other type of code libraries are required. MethodSCRIPT™ allows for running all supported electrochemical techniques, making it easy to combine different measurements and other tasks.
MethodSCRIPT can be generated, edited, and executed in PSTrace.
MethodSCRIPT features includes:
- (Nested) loops and conditional logic support
- User code during a measurement iteration
- Exact timing control
- Entering or waking from hibernation mode
- Logging results to internal storage or external SD card
- Simple math operations on variables (add, sub, mul, div)
- Data smoothing and peak detection
- and many more…
Software Development Kits
PalmSens provides several Software Development Kits (SDKs) to help developers create custom software to control their potentiostat. Each SDK comes with documentation and examples that shows how to use the libraries.
SDKs are available for:
- .NET (WinForms, WPF and Xamarin for Android)
- Python
- LabVIEW
- Matlab
Patches
PalmSens has partnered with two companies that help with custom patch development:
There is demonstration patch from each of these companies to measure the impedance of sweat on your skin. Depending on the availability, the Development Kit will include one of these demonstration patches. Many other applications for a custom patch are possible.
Compatibility
My sensor fits the connector.
The required electrochemical technique for my application is supported.
The analyte conductivity does not require a compliance voltage of 2/2.3 V.
Downloads
Documentation (7)
| Name | Last updated | |
|---|---|---|
| Screentec Wearable Patch Screentec can make bespoke wearable solutions. Read more about this and the example patch in this brochure. | 28-03-25 | |
| Sensit Wearable Communication Protocol v1.5 Initial communication with the Sensit Wearable is always done using this online communication. | 26-03-25 | |
| MethodSCRIPT v1.7 The MethodSCRIPT scripting language is designed to improve the flexibility of the PalmSens potentiostat and galvanostat devices for OEM users. It allows users to start measurements with arguments that are similar to the arguments in PSTrace. PalmSens provides libraries and examples for handling low level communication and generating scripts for MethodSCRIPT devices such as the EmStat Pico and EmStat4. | 26-03-25 | |
| Sensit Wearable Brochure Brochure of the Sensit Wearable with supported techniques, specifications and more details. | 20-02-25 | |
| MethodSCRIPT v1.6 The MethodSCRIPT scripting language is designed to improve the flexibility of the PalmSens potentiostat and galvanostat devices for users. It allows users to start measurements with arguments that are similar to the arguments in PSTrace. | 28-08-24 | |
| Sensit Wearable Communication Protocol 1.4 Initial communication with the Sensit Wearable is always done using this online communication. | 28-08-24 | |
| Sensit Wearable Manual Manual on how to use the Sensit Wearable and the Sensit Wearable Development Kit. | 08-07-24 |
Software (4)
| Name | Last updated | |
|---|---|---|
| Sensit Wearable Firmware v1.5 Firmware for the Sensit Wearable. | 26-03-25 | |
| PStouch for Sensit Wearable PStouch is a free app for Android devices that can be used with PalmSens, Sensit and EmStat potentiostats. PStouch works with your potentiostat via USB or via Bluetooth. | 11-09-24 | |
| PSTrace PC software for all single channel instruments PSTrace software is shipped as standard with all single channel and multiplexed instruments. The software provides support for all techniques and device functionalities. | 08-07-24 | |
|
MethodSCRIPT code examples
MethodSCRIPT code examples include:
- MethodSCRIPTExample_C - MethodSCRIPTExample_C_Linux - MethodSCRIPTExample_C# - MethodSCRIPTExample_Arduino - MethodSCRIPTExample_Python - MethodSCRIPTExample_iOS - MethodSCRIPTExample_Android Every code example comes with a "Getting Started" document. |
07-07-24 |
Other (3)
| Name | Last updated | |
|---|---|---|
| Sensit Wearable Adapter – STEP file and PDF PDF and STEP file of the Sensit Wearable Adapter. The PDF will show you the layer stack and traces on the PCB of the adapter. The STEP file is a 3D file. | 10-12-24 | |
| Mounting Bracket STEP files STEP files of the Sensit Wearable mounting bracket. Can be used for reference or for 3D printing. | 27-08-24 | |
| Mounting Bracket Technical Drawing Drawing of mounting brackets, to be put on a custom electrochemical biosensor. | 03-07-24 |