The operating temperature limits are usually supplied in the manufacturers specification sheets. A typical precision prepolarized microphone from PCB® will be guaranteed to operate up to 120o C. A typical externally polarized microphone will operate up to 150O C. The sensitivity may change SLIGHTLY as the operating temperature changes. A reputable manufacturer will provide a temperature COEFFICIENT of sensitivity (EXAMPLE –0.007 dB/ oC.) The operating temperature for preamplifiers is usually the limiting factor.

A typical preamplifier specification limits the operating temperature to 60oC to 80oC. High temperature preamplifier designs have been developed that meet 120 oC. Probe microphone designs allow for measurements to be made up to 800oC by performing the MEASUREMENT at the end of the probe tip. The probe will allow the sound signals to pass through, while isolating the microphone and preamplifier in a separate housing away from the heat source.

The operating temperature limits are usually supplied in the manufacturers specification sheets. A typical precision prepolarized microphone from PCB® will be guaranteed to operate up to 120o C. A typical externally polarized microphone will operate up to 150o C. The sensitivity may change slightly as the operating temperature changes. A reputable manufacturer will provide a temperature coefficient of sensitivity (example –0.007 dB/ oC.) The operating temperature for preamplifiers is usually the limiting factor.

A typical preamplifier specification limits the operating temperature to 60oC to 80oC. High temperature preamplifier designs have been developed that meet 120 oC. Probe microphone designs allow for measurements to be made up to 800oC by performing the measurement at the end of the probe tip. The probe will allow the sound signals to pass through, while isolating the microphone and preamplifier in a separate housing away from the heat source.