+27 (0)11 568 0236 sking@acontrols.co.za


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.

AQDT Series – Air Quality Transmitter

PMDT Series – Duct Particulate Matter Sensor

PMRMC Series – Particulate Matter Sensor

AIR4 Series – Air Quality Monitor


Reliability and Innovation in the Areas of Pressure and Temperature We can supply you with a variety of products – with the focus on pressure switches, pressure transmitters, and thermostats – to achieve greater reliability and innovation.

C7110 Room Co2 Sensors



Veris Industries, Located in Portland Oregon, is a market focused, customer service oriented, leading supplier of energy and environmental sensors and control peripherals for Commercial HVAC and Energy Management applications.

CDE & CWE Series - Standard Duct and Wall CO2 Sensors



Founded in 1991 Evikon MCI Ltd develops, manufactures and markets sensor-based electronic measurement instruments for industrial and building automation applications

Evikon E2250 Air Quality Monitor