THM 100

Temperature and ECG Monitoring in Mice

Problem

When mice are anesthetized either for non-invasive studies or for surgery, their temperature regulating mechanisms do not work properly. This can lead to a rapid drop in body temperature in a few minutes and can have fatal results. The conventional solution to this problem is a cumbersome pad with circulating hot water or an overhead heat lamp that can cause electrical interference with ECG monitoring equipment.

Solution

The Indus Instruments THM100 is a compact tabletop solution that allows you to electronically control a heating element while simultaneously monitoring temperature and ECG activity.

Temperature Control & Monitoring

• Complete solution for temperature control and heart rate monitoring
• Compact table top design without circulating water
• Electronic control of heater to maintain temperature
• Monitor either rectal temperature or skin temperature

ECG Monitoring

• Built in ECG electrode contact pads
• Electrically isolated ECG amplifier
• Monitor ECG activity and obtain heart rate
• Audio alert when ECG activity is present/absent
• Amplified & filtered analog ECG signal available for chart recorder
• Digital ECG trigger signal available

Specifications

THM100 Base Unit
Heater	0-5W
ECG Filters	LPF 30Hz, 100Hz, or 1KHz User Selectable
ECG Output	Isolated
ECG Output	1V/mV of Input
ECG Alert	Beep with Volume Control
	Beep if no ECG
Size	7 x 5 x 1.25 inches
Weight	12 ounces
Power	110-240V AC Adapter

 

Rectal Temperature Probe
Sensor	Copper-Constantan thermocouple
Accuracy	± 0.1°C after calibration

 

Mousepad
ECG Electrodes	4 limb electrodes (RA, LA, LL, RL)
ECG Setup	4 positions (supine or prone, head north or south)
Heater	Distributed heating with surface mount resistors
Sensor	Built-in surface mount semi-conductor temperature sensor with ± 0.1 °C accuracy after calibration
Size	9 x 12 inches