Teledyne Hastings Instruments HFC-D-302 Flow Controller

The Teledyne Hastings HFC-D-302 Flow Controller is a thermal mass flow controller designed to precisely measure and regulate gas flow in industrial, laboratory, and process automation systems. With a flow range from 0–5 sccm up to 0–25 slm (Nitrogen equivalent; model dependent) and a Constant Temperature Differential Thermal Mass Flow measurement principle, it delivers tight closed-loop control across its operating span. Common applications include semiconductor processing, gas blending, leak testing, analytical instrumentation, and environmental monitoring, and the device is frequently used by system integrators for OEM replacement, repair, retrofit, and preventive maintenance of precision gas delivery systems. Key specifications cover multiple I/O and power options: Digital Series provides RS-232, RS-485, USB communications with 11–36 VDC supply, while Analog Series uses ±15 VDC with 0–5 VDC input and optional 0–10 VDC, 0–20 mA, or 4–20 mA; maximum working pressure is 500 PSIG (optional 1000 PSIG), wetted parts include 316L stainless steel, Nickel 200, 302/304 stainless steel, Kalrez valve seats, and process connections span Swagelok, VCR, VCO, NPT, or Surface Mount depending on configuration.