FRT287 - Frequency Transmitter

Product Diagram

The FRT287 is a isolating transmitter that accepts a variety of frequency or pulse input signals.

Typical inputs include signals from turbine flow meters, NAMUR proximity sensors, or any device producing a DC pulse or pulsing contact. Frequency range is 5Hz up to 5kHz with an amplitude range of 0.2Vp-p up to 50V pulses.

The input conditioning consists of a charge-pump circuit, converting pulse signals produced by a front trigger circuit to an analogue signal.

The measured input is then scaled by an isolating transmitter with a link selectable output providing true three way input/output/supply isolation up to 2000V.

Final calibration is trimmed using the front accessible zero and span 15-turn trim adjustments and a link selectable output range.

A wide range ac/dc supply powers the input and the output circuits.



Most drawings are supplied in PDF format. Portable Document Format is used to present documents in a manner independent of application software, hardware, and operating systems.


Lead Time for a Premier Product


Premier products represent the best value for the selected function and have faster delivery times, typically 4 days.

Order Processing


APCS makes and customises products according to a customers order. Upon receipt of the customers order the following information is required before manufacture, allocation or deliver until full details are given, these include;

  1. Identity of purchaser. Company name, ABN (Australian companies), street address and accounts email address.
  2. Required delivery address.
  3. Full part number and calibration detail required to manufacture items.
  4. Total on purchase order to include delivery charges. Orders received with missing information will be entered and marked to indicate missing details and returned to the customer for correction or approval.

Compliance with the above ensures that your items are manufactured and delivered according to the required specifications.

Standard delivery times commence after the order has been approved for processing.