What is RJC thermocouple?

What is RJC thermocouple?

A thermocouple welds one end of two dissimilar metals and measures the thermoelectromotive force from a converter terminal.

Which thermocouple is which?

thermocouple, also called thermal junction, thermoelectric thermometer, or thermel, a temperature-measuring device consisting of two wires of different metals joined at each end. One junction is placed where the temperature is to be measured, and the other is kept at a constant lower temperature.

Which material is used in J type thermocouple?

Type J thermocouple is a very common and general purpose thermocouple. It has smaller temperature range and a shorter lifespan at higher temperatures. It consist of positive leg made of an Iron wire and negative leg made of an Constantan ( Copper-Nickel ) alloy wire.

How does a type K thermocouple work?

Type K Thermocouple provides widest operating temperature range. It consist of positive leg which is non-magnetic and negative leg which is magnetic.In K Type Thermocouple traditional base metal is used due to which it can work at high temperature and can provide widest operating temperature range.

What is a lm335?

LM 335 is basically an Integrated Circuit (IC) for precise temperature sensor. LM-335 operates on a current range 400uA-5mA having resistance less than 1 ohm. At 10mV/K, its absolute temperature becomes directly proportional to the breakdown voltage. LM-335 operates as two terminal zener diode.

What is J type?

The J Type thermocouple (iron–constantan) is a common, general purpose thermocouple with a termperature range of approximately −40 to +750 °C, and sensitivity of 55 µV/°C.

Where is K type thermocouple used?

K-type thermocouples are found in use for many industries such as water, chemical and gas, and food industries. They are one of the more inexpensive thermocouples with good resistance to oxidization, god linearity of measurement, and stability.

What is STSC1?

Explanation: The STSC1 focuses on the application that requires very precise temperature measurement. It is suitable for consumer electronics, Internet of Things and smart home applications, as well as for data loggers and thermostats.

What is chromel and alumel?

Chromel is an alloy of nickel and chrome plus nine other elements. Alumel is an alloy containing nickel manganese, aluminum, silicon and nine other elements. Chromel is the positive wire; Alumel is the negative. Chromel and Alumel are registered trademarks of the Hoskins Mfg. Co.

What is the difference between Type K and J thermocouples?

Whereas a J Type Thermocouple is made up of iron and constantan, K type Thermocouples are composed of a nickel/chromium alloy (chrome) and a nickel/aluminium alloy (alumel) which gives them much better protection against oxidation and acidity than the iron limbs of the Type J.

Which type of lens is generally used in the PIR sensors?

Fresnel lens
1. Which type of lens is generally used in the PIR sensors? Explanation: Fresnel lens is most commonly used lens in the PIR sensors. These Lens help to evenly distribute the Passive Infrared waves around it which facilitates it to detect motion in 180 degrees in all X,Y and Z axis.