magneto-resistive position sensor

Honeywell's Magnetoresistive Sensor ICs (Integrated Circuit) – Standard Power Series are sensitive devices designed for customers who need a durable and reliable speed or position sensor for large air gaps or small magnetic fields in standard power (3 Vdc to 24 Vdc) applications.

The Standard Power Series is available in two sensitivies:

Ultra-high sensitivity (SM351RT and SM451R): 7 G typical operate, 11 G maximum operate
Very high sensitivity (SM353RT and SM453R): 14 G typical operate, 20 G maximum operate

Unlike reed switches and other magnetic sensors, Honeywell’s solid state design offers a sensitivity of 11 Gauss max, making it the highest sensitivity sensor in its class for standard powered applications.

FEATURES:
- SOT-23 package (SM351RT, SM353RT)
- Flat TO-92-style package (SM451R, SM453R)
- Supply voltage range 3 Vdc to 24 Vdc
- Omnipolar sensing activates with either pole from a magnet
- Temperature range -40 °C to 85 °C [-40 °F to 185 °F]
- RoHS-compliant materials meet Directive 2002/95/EC

POTENTIAL APPLICATIONS:

Industrial:
- High frequency flow sensing in HVAC, water, fuel meters, and gas utility meters
- Anti-tamper detection in water, electric, and gas utility meters
- Liquid level detection
- Motor RPM sensing
- In-cylinder position sensing

Medical:
- RPM sensing in exercise and rehabilitation equipment
- Magnetic interrupt in exercise and rehabilitation equipment
- Absence/presence detection in infusion pumps
- Position sensing of medication dispensing cabinet drawers
- Incline position sensing in hospital beds

Appliances / White Goods:
- Lid, door and drawer position detection
- Fluid flow detection
- Liquid level detection