The Hanna HI-839800 thermo-reactor 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.

• Equipped with 6 pre-defined and 2 user-defined °C profiles.
• Dedicated temperature profiles for COD and total phosphorus reactions are pre-set to 150°C
• The total nitrogen analysis temperature is pre-set to 105°C
• In adjustable temperature mode (50 to 150°C), the heater can be used for other samples that require different digestion temperatures
• 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
• Supplied with power cable and instruction manual