The Hanna Instruments HI-839800 is an easy to use test tube heater with the capacity to perform up to 25 simultaneous digestions. Complete with a countdown timer, it can be used for timed or infinity testing procedures.

Robust and durable, the main body is machined from a single block of metal. Temperature within the block is controlled using a sophisticated electronic thermostat and can be verified by placing a thermometer in the temperature well provided.

Key features

  Heater block temperature is continuously evaluated and displayed on the LCD
  Low temperature alert indicates that temperature is below set value
  High temperature alert warns when temperature rises above the set value
  Reactor has a thermal fuse that prevents overheating by disabling the heater
  Countdown timer shows time remaining until heating element shuts off
  A three hour countdown timer is ideal for timed digestion
  The sound of a 'beep' indicates when the timer has expired and the heating element turns off
  To operate in infinity mode, the timer can be used without the shut-off feature
  Visual power indication
  Green LED indicates power on
  Blinking red LED warns if heater exceeds 50°C
  Yellow LED indicates heating is active
  For optimum safety, the block heater should always be used with a safety shield or other physical barrier placed between samples under test and operator

Accessories

  Stainless steel test tube rack to hold 25 COD tubes - HI 740216
  Bench top safety shield for use with HI-9800 series COD reactor/digester - HI 740217

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