Greystone Energy Systems has manufactured HVAC sensors and transmitters for over 30 years for building and energy management systems. Our expertise with sensory type devices and custom design engineering capability has complimented many original equipment manufacturers for building automation and direct digital control. Distributors, contractors, and facility engineers have trust in the Greystone brand delivering quality assured and competitive priced product to their commercial and light industrial projects.

Properly regulate temperature for optimum comfort, building preservation and equipment longevity.
Protect building structures, contents and processes by accurately monitoring and controlling humidity.
Monitor, maintain and control the movement of air and liquid pressure for HVAC systems.
Air quality detection for VOC’s, Carbon Monoxide, Carbon Dioxide, Nitrogen Dioxide for health and safety.
BACnet® and Modbus communication protocols monitoring multiple points for system notification.
Status indication for various motorized equipment as well as feedback for maintenance requirements.
Measured to insure ANSI/ASHRAE Standards are adhered to and to determine Indoor Air Climate.
Perfect for retrofits, equipment changes, where one signal exists but another signal is required or desired.