Airpax T77130-11 Digital Process Tachometer 120V

Airpax T77130-11 TachPak 1 Digital Process Tachometer is a compact digital instrument in the TachPak 1 family that provides RPM readouts for industrial process control, delivering a clear speed indication from a tachometer input for control loops and process feedback. The model designation identifies the 120 VAC version, with a 50/60 Hz power specification, and T7713011 as an alternate part number for the same device; it is documented in listings as the 120Vac/50/60Hz variant of the TachPak 1 digital process tachometer. It supports operation from 120 VAC or 24 VDC supplies, aligning with common plant power architectures, and is marketed under the Airpax brand, now associated with Sensata Technologies. Distributor pages such as PremiumPLC list the Airpax T77130-11 / T7713011 TachPak 1 Digital Process Tachometer 120Vac 50/60Hz, while Radwell catalogs note the module as discontinued by the manufacturer, with 120 VAC and 24 VDC variants referenced in their stock notes. This combination of a dedicated digital tachometer function and cross-compatibility with standard plant power makes it a viable option for retrofits or replacements on machinery where a reliable rpm readout is required for monitoring, control, or data logging in industrial equipment.