Ushaped thermometer tube. Magnifying lens tubes have special metal indices for registering the highest and lowest readings. These are reset by a small magnet. Temperature range –20oC to +50oC and approx. 350 mm in overall length.
Ushaped thermometer tube. Magnifying lens tubes have special metal indices for registering the highest and lowest readings. These are reset by a small magnet. Temperature range –20oC to +50oC and approx. 350 mm in overall length.