High Service Pumps are widely used in wide varity of water utilities. These pumps typically have Very great in siz. The pumping capacity and are driven with high horsepower motors. While they normally operate reliably, unchecked backpressure can lead to severe pump damage when a pump is started during a reverse rotation condition. To help prevent this problem, Precision Robotics & Automation developed the PRD-2K to detect shaft reversal in pumps. The system features a failsafe reversal switch that constantly monitors a pump shaft to assure that it's turning in the correct rotational direction. Relay contacts in the unit can be used to electrically lock out the starting circuit of the pump to prevent accidental start-up during a condition of reverse rotation. The device is supplied with a custom-machined split collar magnetic pulser wrap that is designed to clamp tightly around the pump shaft. Because the PRD-2K is failsafe, a power failure would de-energize the relay. This means the starting circuit to the pump motor would be disabled. Upon restoration of power, the PRD-2K relay resets but would instantaneously switch out again if it detected a shaft reversal, thus preventing the pump motor from starting during a reversal condition. It also displays the speed of rotation of the shaft in RPM in both side. Feature : Microcontroller based intelligent rotation shaft detection. High precision sensor for detection. Relay changes state when shaft direction reverses Relay resets when reverse motion stops Audio and Visual Alarm output. When the pump stops turning in reverse, the system automatically resets itself to allow a normal, safe start-up. Front Panel settable of reverse rotation condition On power failure, starting circuit to the pump motor would be disabled. Preventing the pump motor from starting during a reversal condition. Display Running RPM of both direction of shaft.

1. PRECISION
Model :- PRD-2K
Precision Robotics & Automation
106, Bhavna Apartment, Satyadev Nagar, Gandhi Road, Gwalior—474002
Email—precision.robotics@gmail.com Web—www.precision-robotics.com
Reverse Rotation Detection Indicator with RPM
Microprocessor Based Inteligent System
Reverse Rotation Indicator
Precision Asset Condition Monitoring

2. PRECISION Precision Asset Condition Monitoring
Model :- PRD-2K
Precision Robotics & Automation
106, Bhavna Apartment, Satyadev Nagar, Gandhi Road, Gwalior—474002
Email—precision.robotics@gmail.com Web—www.precision-robotics.com
With Shaft Speed Sensor
Description
The PRD-2K reverse rotation detection Indicator is a microprocessor based intelligent system, designed to detect when
the shaft rotates in the reverse direction. During operation, the PRD-2K fail-safe reversal detection Indicator constantly
and carefully monitors a shaft or any rotating object to ensure that it is turning in the correct rotational direction. It also
displays the speed of rotation of the shaft in RPM in both side.
Precision Relay controller in the unit can be used to interlock the starting circuit of the pump to prevent accidental
startup during a condition of reverse rotation.
Intelligent Microprocessor continuously monitors incoming signal from a speed sensor. A fail-safe relay output can be
electrically interlocked directly to the motor starter circuit and for the pump and another energizes the hooter for audio
visual warning.
Sensor Installation
The Speed sensor is supplied with a mounting bracket, collar, and set screw for gap distance adjustment. Sensors should
be installed allowing the center of the magnets to pass in front of the center of the sensing head during rotation. The gap
distance (A) is dependent on the pulse generator being used. When using a standard 4" Pulser Disc, the center of the
magnetized area of the disc (B) is 1-3/4" from the center hole of the disc.
Speed Sensor and Disc
Speed Sensor and Pulse Wrap
Digital Reverse Rotation Indicator