SFM4100 datasheet(7/9 Pages) ETC2

7 / 9 page

www.sensirion.com

Version 1.3 – January 2013

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7.5

Pin assignments

Figure 4: Digital output pin assignments (top view)

7.6

Electrical Connection

The SFM4100 Sensor has a 8 pin 2.54 mm pitch electrical

connector (E-Tec: SL2-008-SH108/01-55B).

The following connectors can be used as corresponding

sockets :

for direct PCB mounting of the SFM4100

Through Hole:

Digikey: S7107-ND

SMD:

Digikey: S5713-ND

with ribbon cable connector

Digikey:

609-3568-ND

Mouser:

649-71600-008LF

corresponding ribbon cable

Mouser:

517-3365/08-300SF

Farnell:

9187111

The cable length from the sensor to the microprocessor is

recommended to be below 30 cm. In case longer cable

length is required, please contact Sensirion.

7.7

Sensor handling

The sensors of the SFM4100 series are designed to be

robust and vibration resistant. Nevertheless, the accuracy

of the high-precision SFM4100 series can be degraded by

rough handling. Sensirion does not guarantee proper

operation in case of improper handling. Note: avoid

applying any mechanical stress to the solder joints of the

sensor during or as a result of PCB assembly.

The sensor ships in an antistatic package to prevent

electrostatic discharge (ESD), which can damage the part.

To avoid such damage, ground yourself using a grounding

strap or by touching a grounded object. Furthermore store

the parts in the antistatic package when not in use.

7.8

Packaging, Labeling

Housing: The sensor housing consists of Grillamid (PA12).

The device is fully RoHS compliant – it is free of Pb, Cd,

Hg, Cr(6+), PBB and PBDE.

Each sensor is labelled on the front side:

Traceability Information: SFM4xxx are shipped in trays

of 10pcs with 4 trays per box. The tray dimension is

355mm x 255mm x 21.5mm. Each Sensor is traceable

through its unique serial number.



Sensor type



Sensirion item # (plain

& barcode)



Ser. # (plain &

barcode)



Calib. Gas / max flow /

fitting



Reference conditions

Figure 5: Label sticking on each sensor

8. Ordering Information

Use the part names and item numbers shown in the

following table when ordering SFM4100 series mass flow

sensors. For the latest product information and local

distributors, visit www.sensirion.com.

Part name

Gas

Calibrated

range

Item number

Legris

Downmount

SFM4100

Air; N2

0-20 slm

1-100688-02 1-100890-02

SFM4100

0-20 slm

1-100686-02 1-100888-02

SFM4100

CO2

0-20 slm

1-100687-02 1-100889-02

SFM4100

N2O

0-20 slm

1-100684-02 1-100886-02

SFM4100

0-20 slm

1-100685-02 1-100887-02

SFM7xxx

OEM

tbd

Packaging units: 10 items/tray and 40 items/box.

MOQ: 1 box = 40 Sensors of the same type.

Pin Number

Definition

Pin 1

Sensor Supply voltage

VDD: 3.5-9 V

Pin 2

Not connected

Pin 3

Level shifter supply voltage

VLS: 2.9-5.5 V

Pin 4

GND

Pin 5

Bus Clock Line

SCL: 10-120 kHz

Pin 6

GND

Pin 7

Data Line / SCK

Pin 8

GND



SFM4100-Air

www. sensirion.com



1-100XXX-02

Made in Switzerland

╽║║║║▎▏╽║║▕║║▍▎▏╽║║╿▎▏Air



09320023

20slm

╽║║║║▎▏╽║║▕║║▍▎▏╽║║╿▎▏

fitting



20°C, 1013 mbar

VDD

VLS

SCK

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