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Ethylene Oxide Sensor (ETO Sensor) - ETO-B1

• Sensitivity: 2000 to 3200 nA/ppm in 20ppm EtO
• Response time: < 200 t90 (s) from zero to 20ppm EtO
• Range: 100 ppm EtO limit of performance warranty
• Resolution: < 0.1 RMS noise (ppm equivalent)
• Temperature range: -30 to 50°C
• ​Pressure range: 80 to 120 kPa
• Humidity range: 15 to 90 % rh continuous
• Weight: < 13g

  • Model Number: ETO-B1
  • Data Sheet: Date Sheet File
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  • Ethylene Oxide Sensor (ETO Sensor)
  • Ethylene Oxide Sensor (ETO Sensor)
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Product Specification

ETO-B1 Ethylene Oxide Sensor ETO Sensor Description
Alphasense is expanding its line of electrochemical Toxic Gas Sensors to address industry-specific requirements, including emissions monitoring, process safety, environmental monitoring and VOCs.

Ethylene Oxide (C2H4O)
The ETO is a general purpose sensor, primarily developed for monitoring Ethylene Oxide but also capable of measuring other volatile organic compounds (VOCs). Our toxic evaluation board allows easy adjustment of the bias voltage to optimise this sensor for the required application.
See application note AAN113.
Available in A and B series

ETO-B1 Ethylene Oxide Sensor ETO Sensor PERFORMANCE

Sensitivity

nA/ppm in 20ppm EtO

2000 to 3200

Response time

t90 (s) from zero to 20ppm EtO

< 200

Zero current

ppm equivalent in zero air

< -0.6 to +0.75

Resolution

RMS noise (ppm equivalent)

< 0.1

Range

ppm EtO limit of performance warranty

100

Linearity

ppm error at full scale, linear at zero, 40ppm EtO

5 to 10

Overgas

limit maximum ppm for stable response to gas pulse

500

 

 

 

ETO-B1 Ethylene Oxide Sensor ETO Sensor LIFETIME

Zero drift

ppm equivalent change/year in lab air

nd

Sensitivity drift

% change/year in lab air, twice monthly test

nd

Operating life

months until 80% original signal (24 month warranted)

> 24

 

 

 

ETO-B1 Ethylene Oxide Sensor ETO Sensor ENVIRONMENTAL

Sensitivity @ -20°C

% (output @ -20°C/output @ 20°C) @ 40ppm EtO

30 to 50

Sensitivity @ 50°C

% (output @ 50°C/output @ 20°C) @ 40ppm EtO

115 to 145

Zero @ -20°C

ppm equivalent change from 20°C

<±0.5

Zero @ 50°C

ppm equivalent change from 20°C

< +2 to +5

 

 

 

ETO-B1 Ethylene Oxide Sensor ETO Sensor CROSS SENSITIVITY

H2S   sensitivity

% measured gas @ 20ppm H2S

< 200

NO2  sensitivity

% measured gas @ 10ppm NO2

< 35

Cl2    sensitivity

% measured gas @ 10ppm Cl2

< -3

NO    sensitivity

% measured gas @ 50ppm NO

< 80

SO2   sensitivity

% measured gas @ 20ppm SO2

< 40

CO    sensitivity

% measured gas @ 40ppm CO

< 25

H2     sensitivity

% measured gas @ 400ppm H2

< 0.5

C2H4 sensitivity

% measured gas @ 80ppm C2H4

< 100

NH3   sensitivity

% measured gas @ 25ppm NH3

< 0.1

HCHO sensitivity

% measured gas @ 4ppm HCHO

90

CO2   sensitivity

% measured gas @ 5% volume CO2

< 0.1

       

 

 

ETO-B1 Ethylene Oxide Sensor ETO Sensor KEY SPECIFICATIONS

Temperature range

°C

-30 to 50

Pressure range

kPa

80 to 120

Humidity range

% rh continuous

15 to 90

Storage period

months @ 3 to 20°C (stored in original container)

6

Load resistor

Ω(recommended)

10 to 33

Bias voltage

mV (working electrode potential is above reference electrode potential)

300

Weight

g

< 13


Matched Transmitter board for ETO-B1 ETO Sensor

4-20mA Digital Transmitter Board
   • Factory calibration, custom-set for immediate use
   • Digital zero, sensitivity and temperature compensation
   • Digital and 4-20mA output
   • Biased or unbiased operation
   • Calibration and range change

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