Electronic Scalable Transmitters Models PFT-1E & PFT-4E

The models PFT-1E and PFT-4E are electronic scalable pulse transmitters with AC/DC inputs and outputs. The model PFT-1E combines with the disc and OP meter lines while the model PFT-4E is used with the Industrial turbo meter line.

These electronic transmitters can be scaled to almost any pulse rate, allowing recalibration by resetting the scale factor with four rotary switches. The PFT-1E transmitter can be calibrated for use with different size meters simply by re-setting the rotary switches.

The flow of fluid through any of the meters results in movement of the meter measuring element which rotates an internal four pole magnet. The poles of the magnet are sensed by a magnetoresistive pickup which produces four pulses for each revolution of the magnet. These signals are sent to the electronic board where they are conditioned and scaled to the desired unit of flow, e.g., 1 pulse per ounce, per gallon, etc. The meter factor, which is the number of revolutions of the measuring element per unit of measure, rarely coincides with the desired application requirements and has to be modified or scaled to standard engineering units. This scaled pulse is then sent to secondary equipment such as a controller or remote totalizer in the form of a switched AC voltage or a DC current sinking pulse (open collector NPN transistor).

Designed for totalizing, rate calculation or batching through direct input into a totalizer, pre-set counter or process controller which does not have scaling capabilities.


Features:
• Sensor with withstand fluid temperatures to 250°F
• Solid-state circuitry for long life
• Fast calibration with (4) rotary switches- change gears are eliminated
• LED indicator for visual pulse detection
• Optically isolated outputs prevent false counts due to line noise
• Field retrofit available
• Rugged, high impact resistant housing
• Corrosion proof protection
• Water tight- NEMA 4X Rating
• Remote mounting available