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HTS2010SMD Datasheet(PDF) 2 Page - Humirel |
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HTS2010SMD Datasheet(HTML) 2 Page - Humirel |
2 / 4 page CHARACTERISTICS (CONT) Characteristics Symbol Min. Typ. Max. Unit. Temperature coefficient at 55 % RH / 10 to 40°C Tcc+ 0.04 pF/°C Humidity Hysteresis +/-1.5 % RH Deviation to typical curve (see below) (10 % to 90 % RH) +/-2 % RH Supply voltage Vs 1 5 10 Vac Leakage current (Vs = 5 volts) 1nA Characteristics Symbol Min. Typ. Max. Unit. Nominal resistance @ 25°C 10 k Ω Beta value : B25/100 B3600 3730 3800 Temperature measuring range Ta - 40 100 °C Nominal Resistance Tolerance* Rn 2 3 % B value tolerance B3 % Response Time τ 10 s Humidity sensor Temperature sensor Typical response curve of HTS2010SMD in humidity Typical temperature output TECHNICAL DATA 2 Humirel Sensor Device Data / HPC008 Rev E September 2002 205 200 195 190 185 180 175 170 165 160 010 20 30 4050 6070 8090 100 Relative Humidity (% RH) Calibration data are traceable to NIST standards through CETIAT laboratory. Measurement frequency : 10 kHz Ta = 25°C Depending on the needed temperature measurement range and the associated accuracy, we suggest two methods to access to the NTC resistance values. NTC resistance in Ω at temperature T in K C in pF, RH in % Polynomial response : NTC resistance in Ω at rated temperature in K Temperature in K B value, material-specific constant of the NTC thermistor Base of natural logarithm (e = 2,71828) °C ohm ohm °C R NTC standardized R NTC exponential -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 The actual characteristic of an NTC thermistor can, however, only be roughly described by the exponential relation, as the material parame- ter B in reality also depends on temperature. So this approach is only suitable for describing a restricted range around the rated temperature or resistance with sufficient accuracy. For practical applications a more precise description of the real R/T curve may be required. Either more complicated approaches (e.g the Steinhart-Hart equation) are used or the resistance/temperature rela- tion as given in tabulated from. These standardized curves have been experimentally determined with utmost accuracy ; they are aslo availa- ble for temperature increments of 1 degree. 262960 194110 144790 109030 82923 63591 49204 38279 30029 23773 18959 15207 12280 10000 8178 6734 5575 4636 3874 3237 2720 2304 1960 1674 1432 1235 1067 927 809 °C ohm ohm °C -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 52000 40500 31000 24500 19300 15400 12350 10000 8140 6670 5500 4550 3800 3180 2690 2270 1940 1650 1430 1230 1070 925 810 x 1 2 *Tighter tolerance available on request *Tighter tolerance available on request (Ta = 25°C, measurement frequency @ 10 kHz unless otherwise noted) |
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