Stainless temperature sensors

Figure Bl.27.4. Rotating bomb isoperibole calorimeter. A, stainless steel bomb, platinum lined B, heater C, thermostat can D, thennostat iimer wall E, themiostat water G, sleeve for temperature sensor H, motor for bomb rotation J, motor for calorimeter stirrer K, coimection to cooling or heating unit for thennostat L, circulation pump.

Dry heat sterilization is usually carried out in a hot air oven which comprises an insulated polished stainless steel chamber, with a usual capacity of up to 250 litres, surrounded by an outer case containing electric heaters located in positions to prevent cool spots developing inside the chamber. A fan is fitted to the rear of the oven to provide circulating air, thus ensuring more rapid equilibration of temperature. Shelves within the chamber are perforated to allow good air flow. Thermocouples can be used to monitor the temperature of both the oven air and articles contained within. A fixed temperature sensor connected to a chart recorder provides a permanent record of the sterilization cycle. Appropriate door-locking controls should be incorporated to prevent interruption of a sterilization cycle once begun. 

Fig. 3. Schematic design of temperature sensors. One or more thermoresistors are packed into a stainless steel housing. 3- or 4-strand cabling is recommended...

The electronics needed to operate six temperature sensors on each microreactor channel are located underneath these cards. The ribbon connector, which is also visible in Fig. 12.8, is used to transfer electrical signals directly from the reactor board to the heater circuit board (described below). Serial communications for the Redwood flow manifolds is provided by two, four-conductor RJ-11 jacks on the front. The front of the board has gas inlets for the reactor feed and the purge gas. In addition, there are two gas outlets, one for each reaction channel. The inlet and outlet fittings are 1/16-inch type 316L stainless steel. The tubing assembly component having the greatest pressure sensitivity is the microreactor membrane. 

Figure 15.12 A commercial ISFET pH probe, with a silicon chip pH sensor, a built in reference electrode, and a built-in temperature sensor. This pH probe is housed in a stainless steel body with a slanted tip for easy insertion into meat or other soft solid samples. (Courtesy of IQ Scientific Instmments, Inc. San Diego, CA.)...

For tests of thermal zeroshift (apparent strain) vs. temperature, WK-XX-125 AD-350 strain gauges having compensations (XX) of 6, 9, 13, and 15 ppm/ F were mounted on each of the following materials 316 stainless steel (ss), 21-6-9 ss, OFHC Cu, an NbaSn multifilament conductor, and an NbTi multifilament conductor. On the back of each sample, a Micro-Measurements, Inc., CLTS temperature sensor was also mounted. 

Ehrfeld provides a cartridge reactor, including a heatable cartridge for the incorporation of a packed-bed catalyst filling and a temperature sensor. Characteristic fields of application are heterogeneously catalyzed gas-phase reactions up to temperatures of200 °C and pressures around 30 bar (at 25 °C). The standard material is stainless steel further materials can be supplied on request [114]. 

Since it is not practical to measure the surface temperature of individual test specimens, black panel and white panel temperature sensors are used to represent maximum and minimum temperatures attained, respectively, by samples. The panels are thin metal substrates (stainless steel or anodized aluminum) treated on the front surface with a black or white coating that has good resistance to weathering. A thermocouple or other type of temperature sensor is attached to the center of the front or back side, preferentially the latter. The substrate can be either iminsulated, allowing ambient air to circulate on the front and back for maximum cooling, or insulated on the back to simulate specimens exposed on a... 

Figure 4.27 shows a textile thermocouple as temperature sensor. In this application, a stainless steel yam and a constantan fibre have been applied to a mattress in order to measure the temperature in the bed. The theory is that two different metal rovings, which have a great difference in thermoelectric voltage, can be used as temperature sensors. 

Figure 4.27 Textile themiocouple as temperature sensor by applying stainless steel yam and constantan fibre on a mattress by TFP embroidering.

Figure 1. Schematic representation of the metabolemeter (initial design). The following parts are indicated by numbers (1) pressure transducer (Kulite International, HEM 375 20000), (2) flushing sensible membrane, (3) crucible (17-4-PH stainless steel), (4) chamber (6 mm ), (5) tin joint, (6) crowned insensible surface of the head transducer, (7) plane surface of the crucible, (8) pressure sensor support, (9, 10) horizontal translation movements, (11) steel balls, (12, 13) aluminium plates. (14) vertical translation movement, (15) centring cone, (16) screw, (17) temperature sensor. (Reproduced from [1] by permission of Gordon and Breach Science Publishers, Inc),...

Circular flow configurations are possible from 1 to 3 inches in diameter. Rectangular configurations are possible from 0.625 to 4 inches in maximum diameter. Temperatures up to 350° F and pressures to 250 psi can be accommodated. Sensor construction is of stainless steel with polyetherimide windows for introducing and receiving the microwave signals. 

Fig. 6. Schematic design of a pressure sensor. A flexible stainless steel membrane interfaces the pressure-sensitive elements (bridged piezo-resistors) from the measuring liquid. Some products contain the amplifier electronics in the housing and are (somehow) temperature compensated. The shown 2-strand cabling mode resulting in a current signal is very convenient...

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