Hall Effect Sensor (MH251EST)
Hall-effect magnetic field sensor in the classic MH251 series — position, counting and speed detection for Arduino builds.
- Material
- PCB & electronic components
- Age range
- 8+
- Category
- STEM Robotics & Electronics
- Customisation
- OEM & ODM available
Specifications, component counts and packaging are configurable. Figures shown reflect our standard configuration.
Key features
- Based on the Hall effect discovered by A. H. Hall in 1879 — semiconductor Hall elements are far stronger than metal ones.
- Detects magnetic fields for position sensing, rotation counting and speed measurement.
- Widely used in industrial automation, detection technology and information processing; clean digital output for microcontroller projects.
Frequently asked about this product
How do I connect the Hall Effect Sensor (MH251EST) to my controller board?
The Hall Effect Sensor (MH251EST) uses the standard 3-pin GVS (Ground-VCC-Signal) interface with an XH2.54 connector, so it plugs straight into Arduino UNO, ESP32, micro:bit and our sensor shields with a regular sensor cable — no soldering required. It works with Arduino IDE, Mixly, Mind+, Scratch and mBlock.
What voltage does the Hall Effect Sensor (MH251EST) run on?
The Hall Effect Sensor (MH251EST) runs from a standard 3.3-5 V DC supply (USB or the controller’s 5 V rail). It draws only a few milliamps in normal operation, so it is safe to power from the controller board itself for classroom builds.
What projects is the Hall Effect Sensor (MH251EST) good for?
The Hall Effect Sensor (MH251EST) is built for STEM and robotics education: classroom demonstrations, science-fair projects, robotics club builds and competition robots. It pairs with the rest of our module range — same connectors, same voltage, same toolchain — so students move from first circuit to competition robot without changing platforms.
What certification do the robotics and electronics products carry?
Controller boards, sensors and modules ship with CE marking and RoHS-compliant components, and the range is designed for classroom use under teacher supervision. Product-specific test reports and declarations of conformity are available for distributors on request.
What is the minimum order quantity, and can I get a sample first?
These are standard catalogue lines with stable production, so minimums are low and lead times are short. Samples ship within about a week and are normally credited against a first order. Mixed-SKU cartons are accepted for evaluation orders.
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Need pricing on this line?
Send your target quantity, destination market and any changes you need to artwork, colourway or packaging. We reply with a quotation and the applicable compliance route — usually within one working day.