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Products > Field Devices > Sensors & Switches > Temperature > Transmitters > Room Transmitters


Greystone Energy Systems Inc. is internationally recognized as one of the largest ISO registered manufacturers of HVAC sensors and transducers for Building Automation Management Systems. We have conscientiously established a worldwide reputation as an industry leader by maintaining leading-edge design technology, prompt technical support, and a commitment to on-time deliveries.

TE500AD Series – Room Temperature Transmitter

SPC Series – Room Humidity/Temperature Transmitter w/ Setpoint Control

TXRC Series – Room Temperature Transmitter

TE500AS Series – S/S Room Temperature Transmitter

TXRCL Series – Room Temperature Transmitter c/w LCD

Temperature Product Series


Our sales, production and Development teams work side by side to ensure reliability in every step. In our large scale testing area HVAC/R products are repeatedly subjected to extensive tests. We leave nothing to chance and we believe that only in-house tested products are reliable products.

Sensors & Transducers




ANNICOM has been established as a design and build company for the Industrial Controls, HVAC, and Building Automation Industry for more than 25 years. Alongside its own range of high quality products under the “”Axio”” brand name it also designs and manufactures controls for many of the industry giants on an OEM basis, including such companies as Honeywell, Toshiba Carrier and Clivet.

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