The method of temperature sensing employed in the 2801A Quartz Thermometer is based on the sensitivity of the resonant frequency of a quartz crystal to temperature change.

Advantages of Direct Digital Readout:

• Immunity to noise and cable resistance effects
• No reference junction
• Good interchangeability between sensing probes

Specifications

• Temperature Range: -80 to +250°C
• Display: 6-digit in-line readout in C°, decimal point, °C and polarity indication included
• Counter Operation:
  Frequency Range: 2 Hz to 300 kHz
  Resolution: 10, 1 and 0.1 Hz
• Power Required: 115/230V, 50 to 60 Hz, 85W