ASF1430 Datasheet, PDF (1/9 Pages) Sensitron – Bidirectional Mass Flow Meter

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
Version 2.2 / November
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
SENSIRION’s unsurpassed CMOSens^® sensor technology.
With CMOSens^®, the on-chip sensor element forms an
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.
ASF1400 MASS FLOW METER
MASS FLOW
VOLTAGE
REGULATOR
GND Power
VDD Supply
CMOSens™ SENSOR CHIP
MICRO
CONTROLLER
MASS FLOW
EEPROM
RS232 LINE
DRIVER/
RECEIVER
Figure 1: Block Diagram ASF1400 Mass Flow Sensor with CMOSens^® technology.
/CS
MOSI
MISO
SCK
RxD
TxD
SPI
Interface
no longer
supported
RS232
Interface
www.sensirion.com Sensirion AG, Laubisrütistrasse 50, CH-8712 Stäfa ZH, Switzerland, Phone: [phone], Fax: [phone]