Palmer Wahl 309 Industrial Thermometers (Case Styles: Straight)

Case Length: 9" (220mm) Case

Case Material: Extruded “V” shaped brass with chrome finish

Case Styles: Straight

Crystal: Instrument Quality Glass, Plastic optional

Scale: Numerals and graduations are printed on a painted metal scale, Engraved Scale for Optional ranges

Glass Tube: “Red-Reading” Lens glass, individually calibrated, thoroughly annealed and aged for permanent accuracy

Fill: “Red-Reading” Mercury Fill Standard, Red Spirit Fill optional (up to 300°F/150°C only)

Accuracy: ±1/2 scale division, ±1 scale division if Red Spirit Filled

Calibration: Calibrated to NIST traceable standards

Fitting: 1-1/4"-18 UNEF machined Brass Swivel Nut connection is standard. Stainless Steel optional

Bulb: Tapered design for maximum contact and heat

transfer from Thermowell. Stem and Bulb are Stainless Steel

Wells & Fittings: Palmer Industrial Thermowells are listed in Palmer Catalog PW1100