Pocket Test Thermometers, Spirit - Blue. Reversible plastic case thermometer - the clear body fits to the cap with a bayonet clip which allows the case to be reversed and used as a holder for the test thermometer to avoid contact with the material being tested. Product Specifications. Temperature Range: -10 to +110°C. Sub Divisions: 1°C. Product Material: Clear Pocket Case: Random Co Polymer. Accuracy: +/-1.5°C at 90°C. Glass Tube: Kerosene filled. Immersion: Total. Component Weights: Plastic - 6g. Glass: 11g. Product Weight: 17g. Product Dimensions: 150 x 15mm.