---
publication_id: "OT-2026-000000751"
title: "Monitoring an operating condition of an HVAC flow regulator"
published_at: "2026-09-15T19:03:20.784964Z"
canonical_url: "https://opentechnical.org/p/OT-2026-000000751"
categories:
  - "industrial-motion-power-transmission/fluid-power"
keywords:
  - "f16k37/0066"
  - "f24f11/89"
  - "f24f2140/40"
---

# Monitoring an operating condition of an HVAC flow regulator

## Abstract

A method of detecting an operating condition of a controllable flow regulator in a fluid flow channel of an HVAC system, comprising transmitting a sonic signal, from a sonic transmitter, directly or indirectly to the flow regulator, the sonic signal being distinguished from background noise by being at least one of: (i) modulated according to a modulation schema, (ii) an ultrasonic signal, (iii) a frequency selected to be away from background noise, receiving a signal from a sonic receiver for detecting the transmitted signal after interacting with the flow regulator; and determining, in an electronic signal processor, the operating condition of the flow regulator on the basis of the signal received.