HS-134 HS134 - Datasheet Archive
Tel:886-2-27046595 Fax:886-2-27041279 email@example.com 4F-1, No. 26, Sec. 3, Jen-Ai road, Taipei, Taiwan, ROC.
Sencera Co. Ltd. Data Sheet Tel:886-2-27046595 Fax:886-2-27041279 firstname.lastname@example.org 4F-1, No. 26, Sec. 3, Jen-Ai road, Taipei, Taiwan, ROC. http://welcome.to/sencera HS-134 HS-134 Carbon Monoxide sensor element 1. Characteristics 1. 1. High sensitive and good selectivity to low carbon monoxide concentration. 1. 2 .Long life and reliable stability. l a i r 2. Structure, configuration, symbol of components. 2. 1. Structure and configuration of HS-134 HS-134 is shown as Fig. 1, sensitive components composed by micro AL2O3 ceramic tube, Tin Dioxide (SnO2) sensitive layer, active carbon filtering layer include and made by plastic and stainless steel net. 2.2. Active carbon Particle reduces interference from gases of NOx , Alkane, etc. 2.3 The enveloped HS-134 HS-134 gas sensitive components have 6 pin, 4 of them are 1mm Fig.1 ew v riom.t Dn.c T r Fig,1 HS134 HS134 17.5mm F.zeo Dww P used to take signals(A, B) , and other 2 (H) are used for providing heating current. 3. Working Principle A. Standard circuit As shown in Fig 2, standard measuring circuit of HS-134 HS-134 include 2 parts. one is heating circuit. Have time control function (the high voltage and the low voltage work circularly.) The second is the signal output circuit, it can accurately respond changes of surface resistance of the sensor. e Z w VRL VH n o Heating voltage 4v (High) 60s RL Fig.2 Vc Heating voltage 1.4v (Low) 90s b. The surface resistance of the sensor Rs is obtained through effected voltage signal output of the load resistance RL which series-wound. The relationship between them as below: Rs\RL = (Vc-VRL) / VRL Fig. 3 is relative curve between output signal VRL(measured by using Fig.2 circuit and CO gas concentration. 5 4 3 co 2 H2 1 Alcohol 0 0 100 200 300 400 500 600 700 800 900 ppm Fig.3 l a 4. Figure 1 Min. In 100ppm CO 1 . 5 Min. r e Fig. 4 Dww P ivm.tw ro Dn.c F.zeo In air i r T in air Base on Fig. 2 circuit, Fig. 4 is the signal output curve when the sensor is moved form clean air to carbon monoxide (CO) gas environment. Those data was measured after heating period 2.5 minute from high voltage to low voltage. n o w Environment temperature will effect to sensitivity which relative curve show as Fig.5 e Z -20 N-T 1.50 1.30 1.10 0.90 0.70 0.50 0.30 0.10 -0.10 -10 0 N 10 20 Fig.5 30 40 50 T 60 Sensitive layer of HS-134 HS-134 was made of SnO2 material. So, it has excellent long term stability. Its service life can reach 5 years under follow standard operating condition. 5.Detail description A. Standard work condition Symbol Vc VH (H) technical condition 5V±0.1 4V±0.1 Remark Ac or Dc Ac or Dc VH (L) RL RH Description circuit voltage Heating voltage (high) Heating voltage (low) Load resistance Heating resistance 1.4V±0.1 can be adjustable 33±5% Ac or Dc Ps