Thermistor Probe allows you to effectively measure temperatures at a distance.  Also compatible with Extech’s 341350A-P meter, the 850190 thermistor probe also allows you to test Oyster PH, conductivity, TDS, ORP and salinity when used in combination with the device.

As a means of measuring temperature, the Extech 850190 will allow you gain to readings ranging from 32 to 194°F.  The probe itself is lengthy, allowing you to stay away from volatile and dangerous temperatures while conducting your testing.