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Which of the following is not a self powered control device?

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…………………………. assembly is called transmitter in control system.
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Which of the following sensor is used to provide two position (open or close) signals?
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Current sensors are used to measure ………….
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The controlled device receives the signals from …………….
Which of the following is the measure of overall heating efficiency of heat pump?
What may be maximum pressure that self powered VAV diffuser can operate?
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…………………………………………….. helps in measuring dew point.
Magnetic flow measures the flow rate by ………………………. Caused by the moving fluid when exposed to strong magnetic field?
Which of the following substance circulates through heat pump that transfers, absorbs and releases heat?
Normally the air moves from areas of …………………. to ………………. With the available openings
The installation cost of heat pumps is more than electric resistance heaters.
In low temperature measurements the error in the RTD measurement will be high.
What is the purpose of reversing valve in heat pump?
If the valve opens when the control signal is applied, this valve is called as ………….
When 170 volts is supplied to 208/230 volts compressor ………..
Pitot tube is used to measure ………………..
In ultrasonic sensors, the fluid flow can be measured as a function of the ……………..