Home of RF and Wireless Vendors and Resources

One Stop For Your RF and Wireless Need

Barrettor vs Thermistor-difference between Barrettor and Thermistor

Power measurements at microwave frequencies are generally done by thermal sensitive devices. These devices utilize heat generated by the microwave energy when E-M wave fall on it. This page on barrettor vs thermistor describes difference between barretor and thermistor used for power measurement at microwave frequencies.

Thermistor

Thermistor

The Thermistor is a small semiconductor bead with connecting wires as shown in the figure. It's resistance decreases with temperature. The bead material used for thermistor manufacturing is a mixture of manganese and nickel oxides with copper dust.

Barrettor

Barrettor

The Barrettor is a short piece of fine wire. It is made of platinum with silver coated. The resistance of barrettor increases with the temperature as shown in the figure.

Following are the basic difference between barrettor and thermistor devices.

•   Barrettor has low thermal time constant (i.e. 100 to 300 µs), while thermistor has larger time constant.

•  Barrettor operates at high temperature. Hence not suitable to use at ambient temperature as it does not affect operation of barrettor. Thermistor operates at low temperature, hence it is sensitive to ambient temperature.

•  Barrettor is not suitable for broadband system.

•  Barrettor has poor detector sensitivity about 5.2 Ohm/mWatt while thermistor has high detector sensitivity about 60 Ohm/mWatt. Because of this reason thermistor is more useful at low power measurement.

RELATED LINK

Refer thermistor page for thermistor types viz. NTC and PTC and thermistor manufacturers.


Advantages and Disadvantages of other Sensor Types

Capacitive    Inductive    Photoelectric    Ultrasonic    Infrared    Motion    Biometric    Force    Humidity    Temperature    Light    Barometer    Sound    pH    Soil Moisture   


Different Types of sensors and Transducers


What is Difference between

difference between OFDM and OFDMA
Difference between SC-FDMA and OFDM
Difference between SISO and MIMO
Difference between TDD and FDD
FDMA vs TDMA vs CDMA
FDM vs TDM
CDMA vs GSM


RF and Wireless Terminologies


Share this page

Translate this page