Hall sensor mount for TO-92S (A3144 / SS49E) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/hall-sensor-mount/  (CC BY 4.0)
Basis: Block sized to the A3144 UA / SS49E TO-92S body (4.09 × 1.52 mm), M3 foot hole at ISO 273 clearance (Ø3.4)
Catalog version: 2026-10-20

Sizes: see table below
- The mount is a 14 × 10 × 20 mm block with a 4.09 × 1.52 × 10 mm deep slot in the top face for a TO-92S (UA) hall sensor body, exact.
- The slot sits 1.24 mm behind one 14 mm face, so the sensor's face is that close to the passing magnet side.
- A Ø3.4 hole (M3 clearance) runs through the 10 mm thickness, 5 mm above the base, for the screw that holds it.
- One magnet passing gives one pulse: rpm = pulses per second × 60 / magnets per revolution; on the 12-pole axial-flux rotor that is pulses × 60 / 12.

feature  size_mm
block  14 × 10 × 20
sensor slot  4.09 × 1.52 × 10 deep
slot to face  1.24
foot hole  Ø3.4 (M3)

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Wikipedia: Thermocouple — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Thermocouple
- Wikipedia: Hall effect sensor — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Hall_effect_sensor
- Wikipedia: Dial indicator — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Dial_indicator
- Analog Devices: DS18B20 datasheet — PDF — Manufacturer datasheet — https://www.analog.com/en/products/ds18b20.html
- Long Earth Society: Engine and rig builds — web, video — LES site — https://longearthsociety.com/engineering/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/hall-sensor-mount/index.json
API: https://xemstudio.com/api/geometry?object=hall-sensor-mount