WitMotion SINIT-TTL Current Analog Tilt Switch, IP67 Dual-Axis Security Inclinometer (4–20 mA, ±5°~±90°, 9–36 V)

Overview

WitMotion SINIT-TTL is a rugged dual-axis current-output tilt switch/inclinometer designed for harsh industrial environments. It provides two analog current channels (X/Y) that map tilt angle to current (e.g., 4–20 mA), while a serial port (TTL/RS-232 level) allows access to rich attitude data. The encapsulated IP67 housing withstands >3500 G shock and operates from 9–36 VDC with <40 mA consumption. Typical angle accuracy is 0.2°, with configurable reporting 0.2–100 Hz.

Core parameters (from images):
Dual-axis current output • 9–36 V supply (typ. 12 V) • <40 mA working current • Serial TTL/RS-232 • Angle accuracy 0.2° • Output rate 0.2–100 Hz (default 10 Hz) • Baud 4 800–921 600 bps • IP67 • Temp −40~+85 °C • Shock >3500 G.

Key Features

• Dual-axis current output: Independent X/Y current channels; multiple ranges supported (4–20 mA, 0–20 mA, 0–24 mA, 5–25 mA).

• Wide angle options: Typical angle spans ±5° / ±10° / ±15° / ±30° (default) / ±60° / ±90° with matching current mapping.

• IP67 potting + anti-vibration: Fully potted enclosure, >3500 G shock resistance, −40~+85 °C wide-temp operation.

• High-performance processor: 32-bit MCU at 48 MHz for fast attitude calculation.

• Secondary development friendly: Serial interface exposes attitude data for MCUs/PCs.

• Industrial stability: Anti-interference design for long-term field deployment.

Typical Applications

• Power-line tower/utility pole tilt monitoring

• Bridge/beam/dam tilt monitoring

• Hydraulic lift platforms & aerial work platforms

• Mining machinery and general industrial equipment status monitoring

Wiring (Color → Function)

• Red → VCC (12–36 V DC)

• Black → GND

• Green → RX (sensor receives)

• Yellow → TX (sensor transmits)

• White → OUT X (X-axis current)

• Gray → OUT Y (Y-axis current)

• Purple → AGND (analog ground for current outputs)

Specifications

• Model: SINIT-TTL current-type tilt switch

• Brand: WitMotion

• Supply voltage: 9–36 VDC (typ. 12 V)

• Working current: <40 mA

• Interfaces: Dual-axis current outputs + serial TTL/RS-232 level

• Angle accuracy: 0.2°

• Output/return rate: 0.2–100 Hz (default 10 Hz)

• Baud rate: 4 800–921 600 bps

• Internal measurement (via serial): acceleration ±16 g, gyro ±2000 °/s, Euler angle & quaternion, time stamp; angle ranges X,Z ±180°, Y ±90°

• Ingress protection: IP67

• Shock resistance: >3500 G

• Operating temperature: −40~+85 °C

Notes: The device’s primary analog outputs are X/Y currents for tilt; additional IMU data are available through the serial port.

Angle–Current Conversion (formulas from datasheet images)

Let I be the measured current (mA). For each configured span, angle is:

• ±5°:
  4–20 mA → Angle = (I − 12) / 16 × 5
  0–20 mA → Angle = (I − 10) / 20 × 5
  0–24 mA → Angle = (I − 12) / 24 × 5
  5–25 mA → Angle = (I − 15) / 20 × 5

• ±10°: replace the multiplier × 5 above with × 10.

• ±15°: use × 15.

• ±30° (default): use × 30.

• ±60°: use × 60.

• ±90°: use × 90.

Example (default ±30°, 4–20 mA): at 16 mA,
(16−12)/16×30 = 7.5°.

Installation Notes

• The sensor base must be flat, stable, and fully seated against the measured surface (avoid any wedge/tilt of the mounting plane).

• The sensor axes must be parallel to the target axes; avoid skew between A/B axes.

• Follow the orientation marks (Pitch/Roll) on the label.

Package

• SINIT-TTL inclinometer with integral cable (wire colors as above).
  (Accessories such as test boards shown in images are for demonstration only.)