SENKO

Model Name	SI-100
Detected Gas	Combustible Gas	Toxic Gas	Oxygen
Detection Principle	Catalytic	IR	Electrochemical Cell	Galvanic
Sensor Life	> 5 years	> 2 years	> 2 years	< 2 years
Response Time	<15 sec / 90% scale	<30 sec / 90% scale		<15 sec / 90% scale
Resolution	1%LEL	1%LEL		0.1%VOL
Detection Type	Diffusion Type
Accuracy	±3% Full Scale
Operating Voltage	18~32Vdc
Power Consumption	2.8W @ 24Vdc
Indicators	FND, Gas Concentration, Alarm, Device Fault
Relay Output	1st Alarm, 2nd Alarm, Fault Alarm (Rated 5.0A @30Vdc)
Analog Output	4~20mA (HART: Optional)
Digital Communication	RS-485
Remote Interface	RS-485 Modbus, HART (Optional)
Input & Setting	Non-Intrusive with Magnetic Wand & RS-485 (Optional)
Wiring	4~20mA / DC / Relay: Max 20 AWG
Operating Temperature	-20℃ ~ +55℃
Operating Humidity	5% ~ 95% RH (Non-condensing)
Conduit Size	3/4” NPT × 2EA
Device Warranty	2 Years
Sensor Warranty	1 Year
Material	Transmitter: Aluminum, Sensor Housing: Stainless Steel (SS316)
Dimensions	150(W) x 165(H) x 110(D) mm
Weight	Approx. 1.9kg
Explosion-proof Certification	KCs: Ex d IIC T5 IECEx: Ex d IIC T5 INMETRO: Ex db IIC T5 Gb

Model Name

SI-100

Detected Gas

Combustible Gas

Toxic Gas

Oxygen

Detection Principle

Catalytic

Electrochemical Cell

Galvanic

Sensor Life

> 5 years

> 2 years

< 2 years

Response Time

<15 sec / 90% scale

<30 sec / 90% scale

<15 sec / 90% scale

Resolution

1%LEL

0.1%VOL

Detection Type

Diffusion Type

Accuracy

±3% Full Scale

Operating Voltage

18~32Vdc

Power Consumption

2.8W @ 24Vdc

Indicators

FND, Gas Concentration, Alarm, Device Fault

Relay Output

1st Alarm, 2nd Alarm, Fault Alarm (Rated 5.0A @30Vdc)

Analog Output

4~20mA (HART: Optional)

Digital Communication

RS-485

Remote Interface

RS-485 Modbus, HART (Optional)

Input & Setting

Non-Intrusive with Magnetic Wand & RS-485 (Optional)

Wiring

4~20mA / DC / Relay: Max 20 AWG

Operating Temperature

-20℃ ~ +55℃

Operating Humidity

5% ~ 95% RH (Non-condensing)

Conduit Size

3/4” NPT × 2EA

Device Warranty

2 Years

Sensor Warranty

1 Year

Material

Transmitter: Aluminum, Sensor Housing: Stainless Steel (SS316)

Dimensions

150(W) x 165(H) x 110(D) mm

Weight

Approx. 1.9kg

Explosion-proof Certification

KCs: Ex d IIC T5
IECEx: Ex d IIC T5
INMETRO: Ex db IIC T5 Gb

Gas	Sensor	Range	Low Alarm	High Alarm	Resolution
O₂	Electrochemical	0~30%vol	19.0%vol	23.0%vol	0.1%vol
CO	Electrochemical	0~500ppm	30ppm	60ppm	1ppm
SO₂	Electrochemical	0~20ppm	2ppm	5ppm	0.1ppm
H₂	Catalytic	0~100%LEL	15%LEL	50%LEL	1%LEL
H₂	Electrochemical	0~1,000ppm	100ppm	500ppm	5ppm
H₂S	Electrochemical	0~500ppm	10ppm	15ppm	1ppm
Combustible	Catalytic	0~100%LEL	15%LEL	50%LEL	1%LEL
Combustible	IR	0~100%LEL	15%LEL	50%LEL	1%LEL
NH₃	Electrochemical	0~100ppm	25ppm	35ppm	1ppm
C₂H₂	Catalytic	0~100%LEL	15%LEL	50%LEL	1%LEL
C₂H₆O	Catalytic	0~100%LEL	15%LEL	50%LEL	1%LEL
C₇H₈	IR	0~100%LEL	15%LEL	50%LEL	1%LEL
C₇H₈	Catalytic	0~100%LEL	15%LEL	50%LEL	1%LEL
CH₄	IR	0~100%LEL	15%LEL	50%LEL	1%LEL
CH₄	Catalytic	0~100%LEL	15%LEL	50%LEL	1%LEL
Cl₂	Electrochemical	0~5ppm	0.5ppm	1.0ppm	0.1ppm
Cl₂	Electrochemical	0~20ppm	0.5ppm	1.0ppm	0.1ppm
CO₂	IR	0~2,000ppm	1,000ppm	1,500ppm	3ppm
CO₂	IR	0~5,000ppm	3,000ppm	5,000ppm	8ppm
CO₂	IR	0~5%vol	0.5%vol	3%vol	0.1%vol
HCl	Electrochemical	0~10ppm	1ppm	2ppm	0.1ppm
VOC	PID	0~1,000ppm	50ppm	100ppm	with in 3ppm
C₈H₁₀	Catalytic	0~100%LEL	15%LEL	50%LEL	1%LEL
H₂O₂	Electrochemical	0~10ppm	1ppm	2ppm	0.1ppm
NO₂	Electrochemical	0~20ppm	3ppm	5ppm	0.1ppm
C₂H₄O	Electrochemical	0~30ppm	1ppm	2ppm	0.1ppm
C₂H₄	Catalytic	0~100%LEL	15%LEL	50%LEL	1%LEL
NO	Electrochemical	0~100ppm	25ppm	50ppm	1ppm
HF	Electrochemical	0~5ppm	0.5ppm	1ppm	0.1ppm

SI-100

Product Specifications

Sensor Specifications

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