HC103M2 EPLUSE | Alldatasheet
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www.epluse.comv1.4 / Modification rights reservedHC103M2 HC103M2 Very Fast Humidity Sensor for Radiosondes Nominal capacitance C0 (at 30 °C / 86°F) 160 ± 40 pF Sensitivity 0.55 pF / %RH Working range Humidity 0...100 %RH Linearity error (0...98 %RH) < ±2 %RH Hysteresis 1.9 ± 0.25 %RH Response time RH t63 Temperature dependence dC = -0.0019*RH*(T-30 °C) [pF] Loss tangent < 0.05 Maximum supply voltage 5 V max (VPP) Maximum DC voltage < 5 mV Operating frequency 10...100 kHz, recommended 20 kHz 1) more details for t < -20 °C (68 °F) on request Technical Data HC103M2 is a capacitive humidity sensor with very short response time even at very low temperature. By this, the sensor is ideal for accurate measurement in the upper atmosphere with radiosondes and weather balloons. The sensor is manufactured in state of the art thin film technology and is appropriate for SMD assembly. The design and the choice of materials lead to excellent linearity, high sensitivity and reproducible temperature dependence, which facilitate considerably the design in. HC103M2 is supplied on tape and reel appropriate for standard SMD assembly machines. Radiosondes Weather observation Very short response time High sensitivity and outstanding linearity Reproducible temperature dependence Typical Applications Features Sensor Characteristic The average capacitance increases over the working range is around 55 pF. The following linear approximation of the caracteristic over the range 0–98 %RH leads to errors lower than < ±2 %RH. C(RH) = C0 * [1+HC0 * RH] with HC0 = 3420 ± 250 ppm /% RH capacitance [pF] relative humidity [% RH]
www.epluse.com v1.4 / Modification rights reserved HC103M2 Mounting Instructions For shortest response time, in case of mounting onto a printed circuit board (PCB), HC103M2 shall be positioned over an opening to allow enough air circulation around the sensor. For best accuracy it is important to avoid moisture accumulation such as at the edge of the PCB by selecting appropriate board material or gold-plating the edge of the opening. Please refer to the HC103M2 Handling Instructions at www.epluse.com/hc103m2. 3.8 0.3 5.6 4.8 HC103M2 gold plated cont act through PCB opening HC103M2 0.4 contact area 2.5 Ordering Guide Order Example HC103M2-TR1 Type: HC103M2 Packaging: 1000 sensors TYPE TAPE AND REEL PACKAGING HC103M2 HC103M2 500 sensors TR0,5 1 000 sensors TR1 2 500 sensors TR2,5 For high accuracy requirements, the characteristic is described by the following polynomial: C(RH) = C 0 * [1 + HC0 * RH + K(RH)] whereby: K(RH) = A1*RH+A2*RH1.5+A3*RH2+A4*RH2.5 A 1 = 2.6657*10-3 A 2 = -9.6134*10-4 Assembling and Soldering HC103M2 is an SMD (surface mounted device) sensor, appropriate for automatic assembling with subsequent reflow soldering. Please refer to the Handling Instructions at www.epluse.com/hc103m2 .