The BH Series
The BH Series, available from AI-Tek, are Bi-directional, zero velocity sensors are self-calibrating to the specific customer application and provide two independent frequency outputs and a direction signal output to indicate change in direction of the sensed, ferrous target.

The BH Series bi-directional sensor can also be referred to as a dual-channel sensor since it utilizes two Hall effect sensing elements that physically offset from each other. Each element generates a single channel of target information, identical in frequency and polarity, but offset in the time domain (phase shifted). 

Key Features of the BH Series
Suitable for 32 diametral pitch or coarser gear (target), the standard catalog sensors are easily applied to your various sensing needs. If you have a unique, special requirement that cannot be met with any of the standard options, we will gladly review your specs and work with you on a special sensor design.

It is the customer's responsibility to determine whether the product is proper for customer's use and application.

  • High temperature range of -40°C to +125°C
  • Power on calibration
  • Controlled duty cycle
  • Increased air gaps
  • Special circuitry provides high level of EMI hardness
  • Rugged sensors designed to meet the toughest Navy ship-board standards to European Railroad Applications
  • Supply Tracking or TTL Compatible output options
  • Requires special alignment
  • Fine pitch performance
  • Wide range of supply voltage in single design of 10 - 28 Vdc
  • Reverse voltage protection, up to -30 Vdc, to prevent damage if miswired

How the BH Series Works
Special circuits inside the sensor are designed to calibrate each channel to its application target, then analyze these two channels of information for a phase lead / lag condition. The direction output will then provide a logic 1 level for clockwise or a logic 0 for counterclockwise rotation, assuming proper sensor orientation.

For applications with cable runs that exceed 500 feet, you will need to use a Digital Signal Distance Amplifier (DSDA).

DSDA Information  DOWNLOAD

Datasheet                DOWNLOAD

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