Pocket thermometers

Red spirit filled glass thermometers with nickel-plated, double plug collar which locks the thermometer into its case or allows the case to connect to the top of the thermometer as an extenson handle. Approx. dimensions when fitted into case: 140 x 11.5mm diameter, with pocket clip. With uncoated prismatic measuring capillary. Graduated every 1°C.
Measuring range -10 to +100 °C