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Educational Glass Thermometer with Hook - 10 to 250C

Educational Glass Thermometer with Hook -10 to 250C

SKU CNY-GT-25
Sale Sale
R 19.00
R 19.00 - R 19.00
R 19.00
R 11.00
R 11.00 - R 11.00
R 11.00
Availability:
1441 in stock, ready to be shipped
Educational High-Temperature Laboratory Glass Thermometer designed for precise thermal monitoring in scientific environments. Unlike standard thermometers that often cap at
, this model is specifically extended for high-heat applications up to
 
Key Features
  • Measuring Range: -10°C to 250
    °C
    .
  • Scale Division: 1
    °C
  • Dimensions:
    300 aprox. length with a
    6mm diameter.
  • Capillary Type: White-coated backing to enhance the visibility of the red indicator liquid.
  • Indicator Liquid: Red organic spirit (non-toxic alternative to mercury).
  • Immersion Depth: Total Immersion, requiring the thermometer to be submerged in the medium up to the level of the liquid column for accurate readings.
Safety and Maintenance
  • Non-Toxic: The red spirit fill is safe for use in food or environmental labs where mercury contamination is prohibited.
  • Column Separation: If the red liquid separates, it can often be reunited by cooling the bulb in dry ice or an ice-salt bath to draw all liquid into the bulb.
  • Handling: The "rod-shaped" design is robust but requires a thermometer clamp for secure mounting in boiling flasks or beakers.

Specifications

  • Measuring range: -10°C to 250°C
  • Scale division: 1° C
  • Dimensions: 300 mm x 6 mm dia.
  • Design: Rod-shaped general-purpose thermomete, white-coated capillary, red indicator liquid, total immersion depth.
  • Brand: NONE
Glass Thermometers (-10°C to 200°C / 250°C)
  • Phase Change Experiments: Tracking the temperature of water as it moves from ice to steam to graph the "latent heat" plateaus.
  • Exothermic Reactions: Measuring the heat released when mixing vinegar and baking soda or observing "elephant toothpaste."
  • Solar Ovens: Testing the efficiency of DIY solar cookers; the 250°C range is excellent here as solar concentrators can get very hot.
  • Distillation: Monitoring the temperature of vapors in a simple distillation setup to separate alcohol or essential oils from water.
Recommended Storage
  • Vertical is Best: Store thermometers in an upright (vertical) position with the bulb facing down. This uses gravity to prevent the liquid column from separating.
  • Slight Incline: If vertical storage isn't possible, store them at a 15° angle or greater. Never store them perfectly flat or bulb-up, as this causes "bubbles" or gaps in the red liquid.
  • Temperature Stability: Store in a cool, dry place away from direct sunlight or heat sources (like ovens or radiators), which can cause the liquid to expand and potentially break the glass.
  • Chemical Safety: Keep away from corrosive chemicals or vapours that could etch the glass or fade the printed scale.
  • Inspect Before Use: Before starting a project, check for column separation (breaks in the red line).
  • How to Fix Separation: If the liquid is separated, you can usually fix it by placed the bulb in a cooling bath (ice and salt) to draw all the liquid into the bulb, then allowing it to warm up slowly.

Since these are red liquid (spirit) and not mercury, they are safe for school use; however, they should always be stored in their protective cases.