The HI839800 COD Test Tube Heater features two predefined temperature profiles: 150℃ and 105℃. Digestions for chemical oxygen (COD) and total phosphorus are conducted at 150℃, while total nitrogen digestions are conducted at 105℃. The test tube heater automatically heats up to the set temperature, holding it until the countdown timer has finished. Once the timer has ended, a beep will sound and the heating element will turn off. The outer casing of the HI839800 remains cool to the touch, even during a timed digestion. An optional lab safety shield and test tube cooling rack provide a complete setup for sample digestions.
Features at-a-glance
Predefined Temperature Settings – The test tube heater features two predefined temperature profiles at 150℃ (221℉) and 105℃ (301℉) that can be selected at the press of a button.
Temperature Alerts – The HI839800 alerts users in the event that the temperature of the heating block is either above or below the set temperature. A timer icon reminds users to wait until the heating block has cooled or warmed up before inserting their samples.
Built-in Timer – A built-in countdown timer of up to 180 minutes allows users to easily set the required digestion time by simply pressing the up and down arrows. Once a time has been set and the heating element is stable, a press of the START button begins the digestion procedure.
Status Indicator Lights – Three LED lights are featured on the HI839800. A green LED indicates the heater has been turned on; a yellow LED indicates when the heater is actively heating up to a set temperature; a red LED indicates when the heater goes above 50℃, reminding the user that the aluminum element is hot.
Overheating Prevention – The HI839800 contains a thermal fuse that prevents overheating. Should overheating occur, the heater automatically shuts down and all LED indicator lights turn off.
Reference Temperature Well – In addition to the 25 vial capacity of the aluminum heating block, a small well is ava
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