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Overview

Standard Power Series anisotropic magnetoresistive (AMR) sensor IC, omnipolar, ultra-high sensitivity (7 G typ. operate, 11 G max. operate), flat TO-92-style, 1000 units/bulk.

Honeywell Standard Power Series anisotropic magnetoresistive (AMR) sensor ICs are ultra-sensitive devices designed for manufacturers who need a durable and reliable speed or position sensor for large air gaps or small magnetic fields in standard power (typically 3 Vdc to 24 Vdc) applications. Unlike reed switches and other magnetic sensors, Honeywell’s solid state design offers ultra-high sensitivity of 11 G max., making it the highest sensitivity sensor in its class for standard powered applications. The Magnetoresistive Sensor ICs, Standard Power Series, respond to either a North or South pole applied in a direction parallel to the sensor. They do not require the magnet polarity to be identified, simplifying installation and potentially reducing system cost.

SM451R Omnipolar - Honeywell


Technical Specifications

Series Name Standard Power
Product Type Anisotropic magnetoresistive (AMR) digital position sensor IC
Magnetic Actuation Type Omnipolar
Supply Voltage 3 Vdc to 24 Vdc
Supply Current 8 mA max. at 5 Vdc
Leakage Current 10 µA max.
Output Type Sinking
Operating Temperature -40°C to 150°C [-40°F to 302°F]
Storage Temperature -40°C to 165°C [-40°F to 329°F]
Operate Point 3 G min., 7 G typ., 11 G max.
Release Point 2 G min., 4.8 G typ., 9 G max.
Differential 2.2 G typ.
Package Type Flat TO-92-style, straight standard leads, bulk pack, 1000 units/bag
Switching Time Rise (10 % to 90 %) 1.5 µs max.
Switching Time Fall (90 % to 10 %) 1.5 µs max.
Availability Global

Technical Specifications

Series Name Standard Power
Product Type Anisotropic magnetoresistive (AMR) digital position sensor IC
Magnetic Actuation Type Omnipolar
Supply Voltage 3 Vdc to 24 Vdc
Supply Current 8 mA max. at 5 Vdc
Leakage Current 10 µA max.
Output Type Sinking
Operating Temperature -40°C to 150°C [-40°F to 302°F]
Storage Temperature -40°C to 165°C [-40°F to 329°F]
Operate Point 3 G min., 7 G typ., 11 G max.
Release Point 2 G min., 4.8 G typ., 9 G max.
Differential 2.2 G typ.
Package Type Flat TO-92-style, straight standard leads, bulk pack, 1000 units/bag
Switching Time Rise (10 % to 90 %) 1.5 µs max.
Switching Time Fall (90 % to 10 %) 1.5 µs max.
Availability Global

Documents

TITLE DOCUMENT TYPE LANGUAGE SIZE
Standard Power Series Magnetoresistive Sensor ICs Datasheet Datasheet English 606KB
Standard Power Series Magnetoresistive Sensor ICs Installation Instructions English 575KB
Flat TO-92-style straight standard leads highres photo Photo -- 801KB
Flat TO-92-style straight standard leads lowres photo Photo -- 112KB
Magnetic Sensor IC Flat TO-92-Style CAD Model CAD Model -- 64KB
Position Sensors Range Guide Product Range Guide English 3MB
Standard Power Series Magnetoresistive Sensor ICs Application Note English 370KB
Magnetic Sensors Line Guide Product Line Guide English 377KB
Magnetic Sensor IC Product Line Card Line Card/Selection Chart English 433KB
Magnetic Sensor IC Selection Chart Line Card/Selection Chart English 176KB
Sensors and Switches: Solutions for Medical Applications Flyer English 2MB

Product Features

  • Magnetic sensitivities:
    • Ultra-high sensitivity (SM351RT and SM451R): For applications requiring ultra-high magnetic sensitivity (7 G typical operate, 11 G maximum operate)
    • Very high sensitivity (SM353RT and SM453R): For applications requiring very high magnetic sensitivity (14 G typical operate, 20 G maximum operate)
  • Package styles:
    • SOT-23 (SM351RT, SM353RT)
    • Flat TO-92-style (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]
  • SOT-23 supplied on tape and reel (3000 units per reel)
  • RoHS-compliant materials meet Directive 2002/95/EC

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

White Goods:

  • Lid, door and drawer position detection
  • Fluid flow detection
  • Liquid level detection

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