1. Overview

AN1910 magneto-resistive speed sensor adopts high sensitivity magneto -resistive elements and is embedded with magnetic sensitive elements to implement non-contact speed measurement. As the measured object moves, the sensor outputs square wave level signals that change with rotational frequency ratio.  The two-channel sensor outputs two-channel square wave (TTL level) signals with a phase difference, based on which the running direction of equipment can be determined.

2. Functions

● The object of measurement is a rotary ferromagnetic material body, including gears, racks, cams and special male and female faces;

● Square wave pulse (TTL level) signals are output, which change with the clearance of magnetic conductive material and magnetic material (fluted disc and key slot, etc.);

● The sensor applies to precision measurement of speed (positive and negative operation).

3. Features

● Non-contact measurement; the installation clearance is larger than that of common magneto-electric speed sensors and eddy-current sensors (0-5mm);

● Embedded with high-sensitive magneto-resistive elements, through which square wave signals are output directly, and high immunity from environmental disturbance is realized;

● Short-circuit protection and polarity protection;

● Fully sealed structural design; capable of working under water and oil.

4. Application

Speed measurement of various large rotary machines (steam turbines, fans, pumps, compressors, centrifugal machines, and water turbines, etc).

5. Technical Specifications

● Frequency range:

Single channel: 0 ~ 30KHz 

Double channel: 0 ~ 10KHz

● Output signal:

 Appropriate to TTL level signals; high-level voltage is similar to supply voltage (VT), while low level is not greater than 0.3V.

● Power supply:

Voltage: 5 ~ 28VDC (recommended: 12VDC);

Power consumption: ≤10mA.

● Physical property:

Mounting thread:

Single channel: M10×1  

Double channel: M16×1 (customizable);

Bearing length:

Single channel: 50mm  

Double channel: 75mm (customizable);

Installation clearance: 

Single channel: 1.5mm;

Double channel: 2.5mm;

Weight: 100g (excluding cables and lengthened type).

● Outlet method:

Single channel: Direct outlet, 3-core (power supply, common and signal terminals);

Double channel: 4-core aviation plug output (power supply, common, signal A and signal B terminals).

● Environmental restrictions:

Temperature: -40℃ ~ +75℃ (- 40oF ~ +167 oF)

Can work under oil and water.

● Executive standards

The United States Petroleum Association Standard: API 670

Safety certificate: CE;

Protection level: IP65;

Explosive-proof grade: ATEX: Ⅱ2G ExdⅡCT4/BT4 

Anti-electromagnetic interference: EMC/LVD

Refer to EN55011\ EN 61010\ EN50081\EN50082.

6. Ordering information

   AN1912--Double channel, metric M16X1 mounting threads;

   AN1911--Single channel, metric M10X1 mounting threads, direct outlet;

     AN1911- AXX-BXX-CXX-DXX-00-FXX

     AN1912- AXX-BXX-CXX-DXX-EXX-FXX

Standard model:

     Single channel: AN1911--05-05-05-00-00-00

     Double channel: AN1912--05-07-05-01-01-00

A: Unthreaded length:

05--5mm

Increased by 5mm (0.1in) on order;

Maximum unthreaded length is 20mm/0.8in less than probe bearing;

Minimum unthreaded length is 0mm; maximum unthreaded length: 200mm (8in).

B: Threaded bearing length:

05--50mm

07--75mm

Overall bearing length is increased by 5mm/0.1in;

Overall bearing length is 250mm/10in maximally, and 25mm/1in minimally.

C: Cable length

03--3m

05--5m

xx--Others

D: Outlet method:

00--Direct outlet

01--Aviation plug outlet

E: Armoured

00—Unarmoured

01--Armoured

F: Environmental restrictions

00--No requirement

01--Anti-hazard ATEX: Ⅱ1 G Exia ⅡC T4