Sensus 046-00-021-00 Spring oil-filled aluminum case with a

oil-filled aluminum case with a patented pressure-sensitive interrupter (PSI) for safety

totally enclosed housing prevents dust ingress

it ensures the internal orifice maintains steady downstream pressure despite fluctuating inlet conditions

the switch is defective and needs immediate replacement

it triggers a shutdown if flue gases are not drafting correctly or if a heat exchanger failure occurs

Sensus 046-00-021-00 Spring oil-filled aluminum case with aThe Sensus 046 00 021 00 Spring is a critical calibration component designed for the Sensus Model 046 field regulator series. Engineered for high pressure service, this Yellow Spring provides a precise outlet pressure range of 3 10 psi, making it the standard choice for "pounds to pounds" regulation in farm taps, gas blanketing systems, and industrial air or gas applications. This specific part is physically identical to the Sensus 04600 021 00,