Airpax T77310 Tachometer Module

Airpax T77310 Tachometer Module from the TACHTROL 3 series provides digital speed and rate monitoring for industrial automation, displaying RPM, frequency, and process rate from single or dual input channels. It accepts both active and passive sensors and uses a 5-digit auto-ranging LED display with an accuracy of ±0.05%. The unit covers a frequency range of 2 Hz to 30 kHz (0.1 Hz to 1 kHz in the low range) and offers analog outputs of 0–20 mA, 4–20 mA, 0–5 VDC, or 0–10 VDC. Digital communication options include RS232C/RS485 depending on model, and it provides two programmable relay outputs for control signaling. Power input choices are 120 VAC or 240 VAC, or 12–24 VDC depending on variant, and it mounts in a DIN panel. Designed for rugged environments, it carries MIL-810C shock resistance and operates from 0°C to 50°C. Commonly used in compressors, conveyors, electric motors, pumps, printing presses, paper machines, rolling mills, marine propulsion systems, and packaging equipment requiring precise speed feedback and monitoring. This is a legacy/discontinued product available through Surplus Market, with replacements such as AIRPAX T77310-12 ACHTROL 3 Digital Tachometer and AI-TEK TACHTROL 30 or TACHTROL PLUS models.