23 0900 - HVAC Instrumentation & Controls
See also: 25 5000 - Building Automation and Control
- Acme Engineering Products - Gas detection systems for building ventilation control.
- Air Monitor Corporation
- ASI Controls
- Automation Components Inc. (ACI) - Sensors: temperature, pressure, humidity, current, light level, gases, air quality, smoke detectors and more.
- Bray Controls - formerly Delta Control Products
- Building Automation Products
- Carlon Meter
- Carrier Corporation
- Dodge Engineering & Controls
- Field Controls
- Genesis International
- Intermatic
- KMC Controls
- Nortek Air Solutions
- Onity - Onity is a leading provider of electronic locks, in-room safes and energy management systems.
- Siemens Building Technologies
- Trane - Trane is a manufacturer of air conditioning equipment, controls, service and parts for commercial buildings.
- H.O. Trerice Co.
- Weiss Instruments
- Xylem
