BH-250D-3-HT Cole-Parmer® triple-insert digital block heater heats up from 25 to 200°C in 19 minutes and achieves temperature stability of ±0.1°C at 37°C. Quickly set and view temperature on the 5-digit LED. Adjust the countdown timer between 1 minute and 100 hours in 1-minute increments. Once the countdown timer has completed, it will beep and the unit will begin to cool to ambient temperature. Each block can be set to different temperatures - ideal for multiple users or for applications where samples have to be transferred between two temperatures very quickly. r- Compatible with many size sample tubes and platesr- Excellent temperature accuracyr- Digital control up to 200°Crr- Blocks not included, must be ordered separatelyrr- Block extraction tool included.