Selecting temperature sensors

Select temperature sensors that can be used with multiple heating/cooling media over a wide temperature range without loss of performance... 

Temperature. Temperature sensor selection and installation should be based on the process-related requirements of a particular situation, ie, temperature level and range, process environment, accuracy, and repeatabiHty. Accuracy and repeatabiHty are affected by the inherent characteristics of the device and its location and installation. For example, if the average temperature of a flowing fluid is to be measured, mounting the device nearly flush with... 

Criteria for Selection of Pressure and Temperature Sensors for Compressor Efficiency Measurements... 

MIMOS II has three temperature sensors one on the electronics board and two on the SH. One temperature sensor in the SH is mounted near the internal reference absorber, and the measured temperature is associated with the reference absorber and the internal volume of the SH. The other sensor is mounted outside the SH at the contact ring assembly. It gives the approximate analysis temperature for the sample on the Martian surface. This temperature is used to route the Mossbauer data to the different temperature intervals (maximum of 13, with the temperature width software selectable) assigned in memory areas. Shown in Fig. 3.21 are the data of the three temperature sensors taken on Mars (rover Opportunity at Meridiani Planum) in January 2004 between 12 10 PM on Sol 10 (10 Martian days after landing) and 11 30 AM on Sol 11. The temperature of the electronics board inside the rover is much higher than the temperatures inside the SH and the contact plate sensor, which are nearly identical and at ambient Martian temperature. 

An example of a simulated overnight experiment on Mars is shown in Fig. 3.22 for eight temperature intervals using the Compositional Calibration Target (CCT made out of magnetite rock slab) on the rover as the target. In the case of contact-ring temperature sensor failure, the internal temperature sensor would be used (software selectable). 

Mosadegh Sedghi S, Mortazavi Y, Khodadadi A (2009) Low temperature CO and CH4 dual selective gas sensor using Sn02 quantum dots prepared by sonochemical method. Sens Actu B (In Press)... 

Li, E. Wang, X. Zhang, C., Fiber optic temperature sensor based on interference of selective higher order modes, Appl. Phys. Lett. 2006, 89, 091119... 

Temperature sensitive mixtures, strategic separation schemes and, 22 3lit Temperature sensors, selection and installation of, 20 679-680 Temperature stability, of sealants, 22 29-30... 

During the last years, so-called microhotplates (pHP) have been developed in order to shrink the overall dimensions and to reduce the thermal mass of metal-oxide gas sensors [7,9,15]. Microhotplates consist of a thermally isolated stage with a heater structure, a temperature sensor and a set of contact electrodes for the sensitive layer. By using such microstructures, high operation temperatures can be reached at comparably low power consumption (< 100 mW). Moreover, small time constants on the order of 10 ms enable applying temperature modulation techniques with the aim to improve sensor selectivity and sensitivity. 

Varghese, 0. K. Mor, G. K. Grimes, C.A. Paulose, M. Mukherjee, N. (2004) A titania nanotube array room-temperature sensor for selective detection of hydrogen at low concentrations. J Nanosci Nanotechn 4 733-737... 

The earliest feedback type of unit was the full-power on/off type controller. The selected temperature is set, then the temperature is measured by various types of sensors. The sensor provides the feedback to the power supply, either calling for heat on or off. The oven can be kept at a given temperature by cycling the heater on and off at full power as called for by the sensor. The problem with these controllers is that small cycles in temperature develop, resulting in inconsistent column... 

With Eq. (3), itis also possible to estimate KsuThe uncertainties are the differences between the freezing of the product around the temperature sensor and in the undisturbed product, the position of the sensors, the correlation between time and temperature and occasionally also the actual amount of frozen water. From Figure 1.4.1, the estimated Ksu is approximately 480 kj/m2 h °C with a possible error of 10% and maximum error of 20%. Such high values can only be expected if the vials are carefully selected for their uniformity, especially with respect to a very even and flat bottom. Otherwise, the /< u can be much smaller, e.g. 230 kj/m2 h °C as calculated from data shown in Table 1.4.1. 

There are three main methods by which the effects of temperamre on AW sensors can be minimized (1) selection of low-temperature-coefficient materials (2) incorporation of a temperature sensor and compensation circuitry or software and (3) active control of the sensor temperature. High-precision sensor applications frequently demand that all three techniques be used. 

It is important to note that the partition coefficients are strongly temperature dependent with a subsequent decrease in sorption with increasing temperature. Therefore, the solvation parameters determined for polymers used in sensor technology must be determined close to room temperature, that is at normal operating conditions of sensors, otherwise the sensitivity and selectivity of sensors will be underestimated. Table 11 actually indicates a sharp decrease in the acidity (a), basicity (b), and dispersion (/) parameters as a result of increasing temperature in for example FPOL, a fiuoropolyol. 

The system selects the IRTP series sensor to monitor the temperature of the brake shoe. IRTP sensor series are economical temperature sensors. Monitoring accuracy is not affected by pollution, moisture and the influence of electromagnetic interference environment. 

Micro controller selects the neuron chip as the core components of the LQICLON control unit, with 24 bit analog to digital converter ADS1216, uses AD590 as temperature sensor, and comprises an optoelectronic isolator PS2501 unit. 

NOTES Six Instead of 4 zones of temperature control. The last 5 zones each have a 2nd temperature sensor/control. It assumes energy input control throu ih a low-select device so the loads that were In the lumace j durlhj] the delay will not be overheated. It also permits the newlyoharged cold loads to be heated at a reasonably fast rate. 

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