D3808 Analog Panel Mount Thermometer Vapor Actuated -40 Degrees to 60 Degrees Temp Range (F) Dial Size 2 In. Mounting Front Flanged Tube Length 48 In. Case Material Stainless Steel Lens Material Polycarbonate Tube Material Nickel/Tin PlatedSensor Length 2.5 In. Sensor Dia 0.312 In.-40 Degrees to 15 Degrees Temp Range (C) Accuracy +/-2 Percent Standards NSF Certified