◆    Working principle

Non-distributed infrared (NDIR)

◆    Measuring range

0-5000ppm, 1%/5%/10%/20%/50%/100%vol

◆    Accuracy

0-5000ppm: ±(50ppm+3%Truth value)

vol: ±(0.02%vol+3%Truth value)

◆    Resolution

1ppm/0.01%vol

◆    Response time (T90)

<30s (Free diffusion)

◆    Working temperature

-40℃  ~ 70℃

◆    Storage temperature

-40℃  ~ 85℃

◆    Working humidity

0 ~ 95%RH, non-condensing

◆     Preheating time

1min

◆     Digital output 

TTL level

◆    Analog output

0.4 ~ 2V

◆    Supply voltage

3.0 ~ 5.5 VDC

◆    Working current

Average <60mA @ 3.3VDC

◆    Power consumption 

0.2W (Average value)

◆    Lifespan

>5 years

◆    Warranty

1 year

◆    Weight

21g

V+

Positive electrode of power supply

3.0 - 5.5 VDC

Gnd

Negative terminal of power supply

GND

Tx

Serial port transmitter

TTL TXD

Rx

Serial port receiver

TTL RXD

DA

Analog output

0V means sensor failure

0.2V means sensor in preheating

0.4-2V corresponds to 0-100% F.S.

2-2.2V means overrange