日本根本鋼鐵專用可燃氣體EX傳感器NC-170S

1、Technical Information(C a t a l y t i c T y p e G a s S e n s o rModel N C-170S(Single Header TypeFor Industrial Application深圳市深國安電子科技有限公司地址:廣東省深圳市龍華新區(qū)牛欄前大廈C507蔣小姐話:86755-85258900Catalytic type gas sensor NC series were developed for industrial applications, and NC-170S is a single head

2、er type gas sensor for general combustible gases. Supply voltage and current are compatible with other sensor, however the shape is different from others. On the other hand, reliability, repeatability, stability and responsibility are quite superior to others, additionally the durability in strict c

3、ircumstance are quite excellent. Features and typical application are as follows.2.Features and applications1FeaturesGood stabilityExcellent repeatability and detection accuracyGood linearity against gas concentrationQuick responseDown sizing for design flexibility of gas alarm or detector2Applicati

4、onsFixed type gas alarm or detector for general combustible gasesGas densitometer1Supply voltage to sensor AC 2.0 +/- 0.1V(50-60Hz2Current (when 2.0V is supplied AC 175 +/- 15mA(50-60HzDC 175 +/- 15mA3Ambient temperature and humidity in operationTemperature -20 - +60 degree CHumidity Less than 95%RH

5、(without dew condensation4Ambient temperature and humidity in storageTemperature -30 - +70 degree CHumidity Less than 99%RH(without dew condensation5Detection range 0 around 60%LELLower accuracy over 60%LEL(Except acetylene1Zero offset value in air 0 +/- 30mV(without trimming resistor2Minimum sensit

6、ivity 50mV/1% of methane3Response time Less than 8 sec. at T90Less than 3 sec. at T504Linearity Effectively linear to 60%LEL5Detection accuracy +/- 1%LEL深圳市深國安電子科技有限公司地址:廣東省深圳市龍華新區(qū)牛欄前大廈C507蔣小姐話:86755-852589006 Span drift Less than 1%LEL/month 7 Zero offset drift Less than 0.5%LEL/month

7、8 Warranty period 24 months 5.Appearance and dimension Fig. 1 : Appearance and dimensions6. Measuring circuit diagramI n p u t (+ I n p u t (G N D Fig. 2 : Recommended circuit diagram (R1, 2 : 200ohm, VR1 : 3Kohm7. Gas sensitivity characteristics深圳市深國安電子科技有限公司蔣小姐話:86755-85258900 Fig. 3

8、: Gas sensitivity characteristics8.Temperature dependence at 60%RH Fig. 4 : Temperature dependence of zero offset深圳市深國安電子科技有限公司地址:廣東省深圳市龍華新區(qū)牛欄前大廈C507蔣小姐話:86755-85258900 Fig. 5 : Temperature dependence of relative sensitivity to methane9.Humidity dependence Fig. 6 : Humidity dependence o

9、f zero offset(at 25 degree C深圳市深國安電子科技有限公司蔣小姐話:86755-85258900 Fig.7 : Humidity dependence of relative sensitivity to methane 10.Long term stability Fig. 8 : Long term stability of relative sensitivity to methane 11.Sensitivity distribution Fig. 9 : Sensitivity distribution12.Relative se

10、nsitivity(In case that sensitivity to methane is 100.Gas/Vapor Chemical formula LEL (% Relative sensitivityStd. Methane CH4 5.0 1001 Acetone (CH32CO 2.6 752 Ethanol C2H5OH 3.3 853 Ethyl acetate CH3COOC2H5 2.2 754 Ethylene C2H4 2.7 955 Hydrogen H2 4.0 1306 Iso-propanol CH3-C2H4OH 2.2 757 Methanol CH3

11、OH 6.7 1258 Methyl ethyl ketone CH3-CO-C2H5 1.9 559 N-butane C4H10 1.8 8010 N-heptane C7H16 1.05 6511 N-hexane C6H14 1.2 8012 N-pentane C5H12 1.4 8013 Propane C3H8 2.1 9014 N-octane C8H18 0.95 6015 Toluene C6H5CH3 1.2 6016 Ammonia NH3 15.0 14017 Carbon monoxide CO 12.5 10018 Unleaded petrol 1.2 80Re

12、marksIf other data are required, please contact us since sensitivity of many combustible gases except bad smell, dangerous, poisonous and high boiling temperature materials over 120 degree C are available for investigations.13. Durability1Exposure in hydrogen sulfideTest conditionsSensors were expos

13、ed in 50%LEL of methane and 25ppm of hydrogen sulfide for 1hr. at normal temperature and humidity.No.Before test (mV After test (mVZero offset Relative sensitivity to CH4 Zero offset Relative sensitivity toCH41 27.6 100 28.8 962 8.3 100 8.9 943 23.3 100 24.8 974 10.4 100 11.7 1015 17.8 100 19.4 93深圳

14、市深國安電子科技有限公司2Exposure in HMDSTest conditionsSensors were exposed in 50%LEL of methane and 10ppm of HMDS for 1hr. at normal temperatureand humidity.No.Before test (mV After test (mVZero offset Relative sensitivity to CH4 Zero offset Relative sensitivity to CH41 22.1 100 22.7 682 -9.2 100 -8.8 633 12.

15、8 100 14.1 704 18.1 100 18.7 615 -4.7 100 -4.1 663Exposure in high concentration of methaneTest conditionsSensors were exposed in 8% (160%LEL of methane at normal temperature and humidity for 1hr.No.Before test (mV After test (mVZero offset Relative sensitivity to CH4 Zero offset Relative sensitivit

16、y to CH41 25.8 100 26.7 942 -4.7 100 -3.2 933 11.4 100 13.3 914 11.8 100 13.3 985 -7.5 100 -6.6 944Drop testTest conditionsSensors were dropped from the height of 30cm onto the wood board of 3cm thickness with free fallby 3 times.No.Before test (mV After test (mVZero offset Relative sensitivity to C

17、H4 Zero offset Relative sensitivity to CH41 21.2 100 21.1 1002-18.4 100 -18.7 1003 15.8 100 16.8 1004 14.8 100 16.2 975 12.2 100 14.1 1005Vibration testTest conditionsVibration which is 10Hz with the 4mm of amplitude for 20min. to 3 directions of X, Y and Z wasadded to sensors at normal temperature

18、and humidity.(mVtest No. Before(mV Aftertest深圳市深國安電子科技有限公司Zero offset Relative sensitivity to CH4 Zero offset Relative sensitivity to CH41 0.7 100 0.4 1002 8.1 100 8.8 1003 21.1 100 21.3 1014 -8.9 100 -9.0 1005 10.5 100 10.9 1026Storage in high temperature and humidityTest conditionsSensors were sto

19、red in 60 degree C, 90%RH for 1000hrs. without being energized.No.Before test (mV After test (mVZero offset Relative sensitivity to CH4 Zero offset Relative sensitivity to CH41 -4.4 100 -4.9 972 12.2 100 11.8 963 -1.8 100 -2.7 944 24.9 100 25.6 985 21.7 100 22.1 987Operation in high temperature and

20、humidityTest conditionsSensors were energized in 60 degree C, 90%RH for 1000hrs.No.Before test (mV After test (mVZero offset Relative sensitivity to CH4 Zero offset Relative sensitivity to CH41 -27.2 100 -26.4 952 14.5 100 15.0 943 29.0 100 28.9 944 22.7 100 23.5 915 10.3 100 10.8 928Storage in low

21、temperatureTest conditionsSensors were stored in -20 degree C for 1000hrs.No.Before test (mV After test (mVZero offset Relative sensitivity to CH4 Zero offset Relative sensitivity to CH498-17.5 10012 19.7 100 19.8 953 10.4 100 11.1 934 26.4 100 25.6 975 12.3 100 13.8 9714. Evaluation method深圳市深國安電子科

22、技有限公司1.Test equipmentOutline of test equipment is as follows. Remarks on equipmentsATest chamberMaterial of test chamber is to be inactive like metal, glass or acrylic resin which does not exhale and adsorb gases.V olume of test chamber is to be more than 1 litter per 1pc. of sensor.BCircumstanceCle

23、an circumstance is recommended as evaluation area. Dirty circumstance which contains combustible gases like organic solvent vapor is to be avoided.CGas densitometerLaser gas densitometer is recommended, but volume method is available simply.DAgitation in test chamberEPower supplyBoth of AC power and

24、 DC power are available for sensor, however DC power supply is recommended for accurate evaluation.FDigital volt meterSince the impedance of sensor is fairly low, general digital volt meter having over 100kohm as input impedance is sufficiently available.GVentilationVentilator with ventilation capac

25、ity of over 10 times/min. of the volume of test chamber is recommended for the convenient evaluation.HInstallation position of sensor in test chamber When the sensor is installed in test chamber, it should be careful that each sensor is to be in constant position because output signal changes in cas

26、e that position of sensor changes. If the rough evaluation is carried out, such careful treatment is not necessary. 2. Adjustment of gas concentration Adjustment of gas concentration is to be conducted by volume method or by using laser gas densitometer. In case of volume method, gas volume to be in

27、jected into a chamber is obtained from the calculation formula below described. V (ml = Vi C10 6 V Vi Tc Tr C 273 + Tr 273 + Tc : Gas volume to be injected : Volume of test chamber（ m l ） : Temperature in test chamber（） : Room temperature（） : Target gas concentration ( ppm 3. Evaluation method A. Pr