www.sensirion.com Sensirion AG, Laubisrütistrasse 50, CH-8712 Stäfa ZH, Switzerland, Phone: +41 44 306 40 00, Fax: +41 44 306 40 30

ASF1400

Bidirectional Mass Flow Meter

_ Unique dynamic range:

0.01 sccm – 400 sccm

_ Outstanding resolution and accuracy

_ Ultra fast response time

_ Hysteresis & offset free

_ Calibrated & temperature compensated

_ RS-232 and

ASF1400 Product Summary

The ASF1400 Mass Flow Meter enables extremely

accurate bidirectional measurement of gas flow over four

orders of magnitude. Its leading performance is based on

integrated whole with the amplification and A/D converter

circuit. This results in superior resolution, fast response

time and large dynamic range at lowest power

consumption.

All measurement data is fully calibrated and temperature

compensated by means of an internal microcontroller.

Mounted in rugged, chemically inert PBT housing the

ASF1400 is suitable for a wide range of applications. Such

include mass flow metering for process control, medical

applications, heating ventilation and air conditioning

(HVAC) solutions, as well as gas flow metrology.

The sensor housing provides two inlets for measuring the

gas flow and withstands overpressures of 2 bar (29 psi).

The ASF1400 requires a supply voltage of 7…18Vdc and

provides an RS-232 compliant electrical interface.

Version 2.2 / November

MASS FLOW

VOLTAGE

REGULATOR

MICRO

CONTROLLER

RS232 LINE

DRIVER/

RECEIVER

EEPROM

GND

VDD

/CS

MOSI

MISO

SCK

RxD

TxD

MASS FLOW

ASF1400 MASS FLOW METER

SPI

Interface

RS232

Interface

Power

Supply

CMOSens™ SENSOR CHIP

no longer

supported