INTELLIGENT SERIES GAS SENSORS (iSERIES)

iSO2 SERIES

iSO2 Series Gas Sensor Datasheet | sps.honeywell.com/ast |

2

20,0 (includes label)

10,0 ±0,2

45°

‡

(O-ring)

7,00 ±0,10

6,75

CS

Ve

+V

‡ For mounting and sealing

around sensor, refer to iseries

Sensor Mounting Application

Note.

Do not

obscure

Rx

Tx

3,6

Ø 2,00

Shorting pads

3 posn.

2,0 typ.

5,4

10,8

3,6

1,8

Product Dimensions

All dimensions in mm

Do not connect to

unlabeled pins.

TABLE 2. ELECTRICAL SPECIFICATIONS

Min.

Max.

Typ.

Unit

Supply Voltage (Vdd)

3

3.6

3.3

Vdc

Voltage of any pin relative to

ground

0

3.6

–

Vdc

Peak supply current (typ. volt)

25

mA

Current: at stand-by mode

–

–

15.31

mA

Current: at active mode

–

–

26.36

mA

Average power consumption

0.046

90

0.087

mW

For compatibility with the whole iseries range, the supply voltage should be

between 3.1 V and 3.3 V.

TABLE 3. PINOUT

Pin

Description

+V

Positive power supply

-V

Ground

Rx

Data transmitted from instrument to sensor

Tx

Data transmitted from sensor to instrument

CS

Chip Select

Other Pads Do not connect, shorting link contacts only

TABLE 1. TECHNICAL SPECIFICATIONS

MEASUREMENT

Operating Principle

Electrochemical

Target Gas

SO

2

Range

0 to 20 ppm

Accuracy

±5% of measuring value

Filter

To remove H

2S

Capacity: 400 ppm hours to 25 ppm H

2S

T90* Response Time

<30 seconds, typ.

T50* Response Time

<10 seconds

Output

ppm output compensated for temperature

Overload (maximum

concentration that can be reached

before damaging the sensor)

150 ppm

Linearity*

Linear (±5% from linear up to 20 ppm)

Measurement Interval

1 sample per second (1 Hz)

Resolution

0.1 ppm

Baseline (Offset)*

<-0.2 ppm to 0.5 ppm equivalent

Zero Shift

20°C to 40°C <0.2 ppm equivalent

Repeatability*

±2% of measured value

Orientation Sensitivity

None

Warm-up Time

Approximately 30 minutes for accurate

measurements (see iSO2 characterisation

note for details).

Serial Comunication

UART with Chip Select

ENVIRONMENTAL

Operating Temperature

Range

-20°C to 50°C (continuous)

-40°C to 55°C (intermittent)

Operating Humidity

Range

15% RH to 90% RH (non-condensing).

Extended exposure to extreme humidity

conditions will degrade sensor performance

Operating Pressure

Range

600 mbar to 1200 mbar

Recommended Storage

Temperature

0°C to 20°C

Flow Rate

Typical: 200 ml/min when using

recommended gassing hood.

(Consult iseries Sensor Mounting

Application Note)

LIFETIME

Long-Term Output

Drift*

<10% signal loss per annum

Expected Operating

Life **

5 years in air

PHYSICAL CHARACTERISTICS

Weight

<6 g

Contact Material

Gold plated

O-Ring Material

FKM60 ±5 shore A

Outer Plastic Body

Material

Modified PPO

* Specifications are valid at 20°C, 50% RH, and 1013 mbar using Honeywell

recommended circuitry. Performance characteristics outline the performance of

sensors supplied within the first three months. Output signal can drift below the

lower limit over time.

** Depends on environmental conditions