Dwyer 3003MR Photohelic® Switch/Gauge is a versatile and accurate monitoring device for air and non-combustible gases. With a temperature range of 20 to 120°F and an accuracy of ±2% of FS, it ensures reliable measurements. It operates on 24VDC power, with optional 24VAC. The electrical connections come with an 18" cable assembly and can be extended up to 100'. The switch type uses solid-state relays, and set point adjustment is easy with adjustable knobs on the face. Compact with a 4" dial face and 5" OD, this product is suitable for various mounting orientations.