MAC Instruments Mac Instruments is one of the India’s leading manufacturers of the largest range of Proximity Switches and high technical industrial micro controller based automation products. The company in the span of years has shown a consistant growth rate of more than 100% and its production has increased by more than 200%. Mac Instruments is manufacturer of Process Control Instruments, like Digital Temperature Controller, PID Controller, Blind Temperature Controller, Blind Timer, DPM, Counters, Humidity Instruments, Load Instruments, Display Sysytems and RPM Meter.