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- All products are tax-inclusive.
- Product Inventory Location: China
- EU Countries Delivery Time: 1.5 weeks.
- Other Countries Delivery Time: 2 ~ 2.5 weeks.
Note: All products are tax-inclusive.
VA Meter is a professional programmable high-precision power meter designed for accurate voltage and current measurement. This product is based on the M5StampS3 main control module, supporting WiFi functionality. It features two serially connected INA226 current and voltage measurement circuits, providing current detection resolutions of 2.5uA and 250uA, and supports a measurement range of 0-5A and 5-24V (1-24V in isolation mode). The product can be powered through a USB-C interface or Base terminal input and includes built-in power and signal isolation. Users can select between isolated measurement via USB power or non-isolated measurement using direct power through a toggle switch, catering to different application needs. The accompanying expansion BASE includes relay on/off control and a Grove port for secondary development.
Additionally, the instrument supports OTA firmware upgrades and USB MSC/OTG functionality, allowing users to edit and view data and configuration files stored in the main control file system on a PC. M5 also provides a free online data API interface, enabling users to upload test data to the EZData platform for remote access and browsing, significantly simplifying IoT application development. The VA Meter is a versatile and developer-friendly instrument, ideal for engineering projects requiring precise current and voltage measurements, as well as fields such as industrial automation, equipment monitoring, and smart grids.
High precision current detection (2.5uA/250uA precision switching)
Wide voltage input (5-24V)
Cloud (EZData) real-time data display
PD input (internal does not contain PD decoy)
Multiple power supply modes (PD INPUT/StampS3/External terminal)
Power is isolated from the signal
USB MSC/OTG function
Open-source hardware and software
OTA Upgrade
1x VA Meter
1x VA Meter Base
2x 3.81-2P terminal
4x Hanger (small)
Industrial Automation
Equipment Monitoring
Smart Grid
Power Testing and Analysis
Internet of Things (IoT) Devices
Smart Home Management
Remote Monitoring and Data Collection
Resources | Parameters |
---|---|
Power detection chip | INA226 |
SoC | ESP32S3FN8@Xtensa® 32-bit LX7 dual-core processor up to 240 MHz |
Flash | 8MB Flash |
PSRAM | N/A |
Wi-Fi | IEEE 802.11 b/g/n (2.4 GHz Wi-Fi) |
Screen | 1.3 Inch@ 240*240 Pixel |
Screen Driver | ST7789 |
PD Input/Output Power | 5-24V@0-5A |
Current detection resolution | 2.5uA/250uA |
Current sampling error | Small current (1-100mA) sampling error: 1.01% Large current (100mA-5A) Sampling error: 0.94% UA-level current sampling error: 0.69% |
Power Consumption (factory firmware) | SSTAMP_S3 USB power supply: DC5V/123.5mA PD INPUT power supply: DC5V/118mA DC12V/66.8mA DC24V/26mA |
PD OUTPUT capability | DC24V/3A 68℃ DC24V/5A 92℃ |
USER interaction | Rotary encoder switch, reset button, boot button and board |
INA226 Communication Address | Two detection chips INA226:0x40/0x41 |
Relay | DC 5-24V @5A |
Operating Temperature | 0-40°C |
Product Size | VAMeter 36*36*14.7mm VAMeter 36*36*20.3mm Rail Fastening 51.5*48*5.5mm |
Package Size | 150*93*30mm |
Product Weight | VAMeter:17.7g VAMeter Base:25.8g Rail Fastening 4g |
Package Weight | 68.1g |
* Certain EU Countries are not included in our EU Zone definition: United Kingdom (excluding Ireland), Switzerland, Liechtenstein, Vatican City, Albania, Belarus, Norway, Ukraine, and Iceland. For above countries the International Shipping Rule applies.
Distributors are not eligible for free shipping.
We offer competitively priced shipping services via Deutsche Post, DHL, YunExpress, and 4PX, with tracking to ensure your products are delivered safely and promptly.
Faster shipping times to Western and Eastern Europe apply only to products marked as "Product Inventory Location: Germany" on the product page. If the product is not labeled with this location, it will ship from our Chinese warehouse following the corresponding shipping schedule above.
Whether shipped from Germany or China, we cover all import duties and taxes, ensuring that you receive your package without any additional costs or hassles with customs.
Please verify the inventory location on the product page before placing your order to confirm delivery timeframes. For any questions or further assistance, feel free to contact us!
Our products are stored in both our Shenzhen and German warehouses to provide more flexible logistics solutions tailored to different regions and customer needs. On each product's description page, we indicate the specific warehouse location to help you better plan your purchase and delivery schedule.
For products stored in our warehouse in Germany, we use either Deutsche Post or DHL for shipping, depending on the size of the package. Logistics within Germany are very efficient, with an estimated delivery time of 2-4 business days, ensuring you receive your order quickly and conveniently.
Products shipped from our Chinese warehouse are handled by YunExpress. Given the complexities of international shipping, the estimated delivery time for these packages is around 10 business days, though this may vary slightly due to customs processes or other uncontrollable factors.
To ensure that your order is delivered within your desired timeframe, we recommend reviewing the warehouse information provided on the product pages before placing your order and selecting the appropriate shipping option. If you have any questions or need further assistance, please don't hesitate to contact our customer support team—we are here to help you!
Please note that it may take 1-2 working days for Deutsche Post, DHL, YunExpress, and 4PX services to update the status from 'Shipped' to 'Traceable'.
Effective Date: March 25, 2024
OpenELAB guarantees to provide accurate descriptions and high-quality products. If you encounter any problems with any executed purchase order, please notify OpenELAB within 60 days from the date of shipment.Receive our latest updates about our products & promotions.
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