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Gas Sensor Modules
Electrical Data
Loop Type 3 wire
Loop Resistance 800 Ohm with 28VDC
400 Ohms at 21 VDC (4101-02)
Input Voltage DC 14-30 VDC (20-30VDC 4101-02)
Input Current 40 mA (80 mA 4101-02)
Input Power Max 1.4W (2.3W 4101-02)
Signal Output 4-20 mA DC linear (trouble 0 mA)
Operating Pressure +10% (variation from ambient)
Specifications
Cross Sensitivity Data
Model Gas Reading from 100 PPM of interfering gas
Number type CO H
2
SCl
2
H
2
SO
2
NO
2
NO HCl HCN C
2
H
4
4101-04 CO 100 5 0 <20 00600<50
4101-05 H
2
S <2 100 -20 <0.1 <15 -15 0 0 0 0
4101-06 Cl
2
0 <-10 100 0 0 105 0 0 0 0
4101-10 SO
2
<1 0 -40 0 100 -100 0 0 15 0
4101-12 NO
2
0-20900010000-30
4101-13 CO 100 350 0 <60 60 -60 25 0 0 <75
4101-16 CO 100 0000000035
4101-19 NO 0 35 0 0 5 25 100 15 0 0
4101-21 HCl 0 75 -10 0 35 -2 0 100 -8 0
4101-22 HCN <0.5 -50 0 160 -190 -5 100 <1
4101-27 C
2
H
4
O Ethanol 55
(ETO) Toluene 20
Methyl-ethyl-ketone 10
Carbon Monoxide 40
Sierra Monitor Corp. 1991 Tarob Ct., Milpitas, CA 95035, USA, 408-262-6611, 800-727-4377, FAX: 408-262-9042
Web Site: http://www.sierramonitor.com E-Mail: sierra@sierramonitor.com
Gas Type Model Sensor Range Units Resolution Response Sensor Operating Range
Time (1) Life (2)
o
F
o
C RH
Combustibles 4101-02 Catalytic 0-100 %LEL +/-3% F.S. (3) 3 Yrs -40 to 167 -40 to 75 10 - 95%
Oxygen 4101-03EL EC 0-25 % Vol +/-0.1% <10 sec. 2 Yr 5 to 122 -15 to 50 5 - 99%
Carbon Monoxide 4101-04 EC 0-500 PPM 1.0 PPM <25 sec 2 Yrs -4 to 122 -20 to 50 15 – 90%
Hydrogen Sulfide 4101-05 EC 0-100 PPM 0.1 PPM <30 sec 2 Yrs -40 to 122 -40 to 50 15 – 90%
Chlorine 4101-06 EC 0-10 PPM 0.1 PPM <60 sec 2 Yrs -4 to 122 -20 to 50 15 – 90%
Sulfur Dioxide 4101-10 EC 0-100 PPM 0.5 PPM <20 sec 2 Yrs -4 to 122 -20 to 50 15 – 90%
Nitrogen Dioxide 4101-12 EC 0-20 PPM 0.2 PPM <35 sec 2 Yrs -4 to 122 -20 to 50 15 – 90%
Carbon Monoxide 4 4101-13 EC 0-1000 PPM 0.5 PPM <35 sec 2 Yrs -4 to 122 -20 to 50 15 – 90%
Carbon Monoxide 4101-16 EC 0-2000 PPM 0.1 PPM <35 sec 2 Yrs -4 to 122 -20 to 50 15 – 90%
Nitric Oxide 4101-19 EC 0-20 PPM 0.5 PPM <15 sec 3 Yrs -4 to 122 -20 to 50 15 – 90%
Hydrogen Chloride 4101-21 EC 0-20 PPM 0.1 PPM <100 sec 2 Yrs -4 to 122 -20 to 50 15 – 90%
Hydrogen Cyanide 4101-22 EC 0-20 PPM 0.1 PPM <70 sec 2 Yrs -4 to 122 -20 to 50 15 – 90%
Ammonia 4101-25 EC 0-50 PPM 1.0 PPM <30 sec (5) 14 to 113 -10 to 45 20 – 95%
Hydrogen Fluoride 4101-26 EC 0-10 PPM 1.0 PPM <30 sec (5) 14 to 113 -10 to 45 20 – 95%
Ethylene Oxide 4101-27 EC 0-20 PPM 0.1 PPM <90 sec 2 Yrs -4 to 122 -20 to 50 15 – 90%
Notes: (1) Response time to 90% full signal value for applied concentration
(2) Sensor life typical for use at standard temperature and pressure with occasional exposure to gas of interest
(3) Step to 50% LEL within 10 seconds. Recovery to 10% LEL within 30 seconds
(4) Hydrogen tolerent
(5) Diffusion via membrane. Requires electrolyte and membrane replacement every 6 months.
Construction
Modules Dimensions Weight
4101-02 H: 7.5", D: 4.0", W: 4.0" 2.0 lb
(21.6 x 10.2 x 10.2 cm) (0.9 Kg)
4101-03EL H: 8.5", D: 4.0", W: 4.0" 2.1 lb
(21.6 x 10.2 x 10.2 cm) (1.0 Kg)
4101-04-27 H: 8.0", D: 4.5", W: 4.0" 2.7 lb
(20.3 x 15.2 x 15.2 cm) (1.3 Kg)
4101-25/26 H: 10.2", D: 6.0", W: 6.0" 2.7 lb
(25.9 x 15.2 x 15.2 cm) (1.3 Kg)
© 2004 by Sierra Monitor Corporation
05/04
4101-02 Combustible Gas Sensor
is FM Approved