Principle of various temperature sensor 2.1 Thermocouple: Thermocouples are ther moelectric sensors th at basically consists of two junctions of dissimilar metals, such as copper and constantan type temperature range (°c) (short term) sensitivity (µv/°c) conductor alloys k −180 to +1300 41 chromel (90% ni, 10% cr) alumel (95% ni, 2% mn, 2% al, and 1% si) j −180 to +800 55 100% fe constantan (55% cu, 45% ni) n −270 to +1300 39 nicrosil (84.1% ni, 14.4% cr, 1.4% si, 0.1% mg) nisil (95.6% ni, 4.4% si) r −50 to +1700 10 87% pt, 13% rh 100% … The maximum temperature range of smart temperature sensors is limited to that of the electronic circuitry. Usually, this is in the range of about 50 Ctoþ140 C. Yet, when using nonconventional Temperature Measurement 1.0 Introduction Temperature measurement in today's industrial environment encompasses a wide variety of needs and applications. To meet this wide array of needs the process controls industry has developed a large number of sensors and devices to handle this demand. In this Installation of temperature sensors will be done with screws or flanges. In case of screwing, apply sealing tape or sealing agent for tapered thread, and O-ring gasket for parallel thread, and then tighten with spanner. For flange connection, use specified gasket and tighten all bolts equally. The TS-6300 temperature sensor series has been designed to work with Metasys and System91 field controllers. TS-63000 Temperature Sensor and Transducers Product Bulletin. PBTS-6300012 2013 2 Application The TS-6300 are designed for measuring temperature in gaseous media of heating/cooling and air conditioning systems. Semiconductor temperature sensors can be integrated into multi-function ICs which perform a number of other hardware monitoring functions. Figure 7.2 lists the most popular types of temperature transducers and their characteristics. TYPES OF TEMPERATURE SENSORS Time constants are values used to indicate the time it takes a sensor to read 63.2% of a step change in temperature. This test is conducted in water flowing at 3 ft/sec or 20 ft/sec in air. Typically this measurement is made by plunging a sensor at room temperature into a bath at 80°C and noting the time required to reach 63.2% of that step ±imetĊl lemperĊture _fensors • ´ ²imetallic Strip is tied on one end and other end is free to move. • ´s temperature rises Yellow strip expands more than the 1,reen Strip and bimetal bends upwards to close the contact. This is used for Temp thresh holding ²OJGNot recommended for continued use above 420° u0018ellow strip hĊs higher lemp oefficient Strain Gage: Materials material gage factor, G TCR (10-5) Ni80 Cr20 2.1 - 2.6 10 Pt92 W8 3.6 - 4.4 24 Silicon (n type) -100 to -140 70 to 700Germanium (p type) 102TCR = temperature coefficient of resistivity (ºC-1) • Note: • G for semiconductor materials ~ 50-70 x that of metals between the three temperature sensors' output characteristics. Table I. TMP3x Output Characteristics Offset Output Voltage Output Voltage Sensor Voltage (V) Scaling (mV/ C) @ 25 C (mV) TMP35 0 10 250 TMP36 0.5 10 750 TMP37 0 20 500 The output voltage of the temperature sensor is available at the emitter of Q4, which buffers the band gap core Principle A temperature transducer is an electrical device usually used in automated air-temperature control sequences. Its purpose is to take a measurement of the air temperature and relay the information after translating it into a readable for