ASF1400 SENSIRION, ASF1400 Datasheet - Page 2

• Manufacturer Part Number: ASF1400
• Description: SENSOR, MASS FLOW
• Manufacturer: SENSIRION

Specifications of ASF1400

• Pressure Max: 120Pa
• Supply Voltage Range Dc: 7V To 18V
• Accuracy: ± 1%
• Air Mass Flow Range: -400sccm To 400sccm
• Svhc: No SVHC (15-Dec-2010)
• Connection Size: 5mm
• Measuring Range: .015 To 400 Sscm
• Supply Voltage Dc: RoHS Compliant
• Response Time: 142ms
• Rohs Compliant: Yes

ASF1400 Bidirectional Mass Flow Meter
Introductory Description
The heart of the ASF1400 mass flow meter is
powered by Sensirion’s unsurpassed CMOSens
sensor technology. The ASF1400 mass flow meter
therefore provides unbeatable performance at very
attractive system cost. The lowest detectable gas flow
rate is 0.003 sccm, which means a minimum volume
of 3 mm
at the same time a flow range of more than 4 orders
of magnitude, the ASF1400 sets a new standard
wherever mass flow has to be measured or
controlled.
The ASF1400 device measures true mass flow
independent of the ambient temperature and pressure
changes. You simply connect the gas to be measured
to the ASF1400 device to get an instantaneous gas
flow rate at a sampling rate of up to 7Hz (please
contact us for sampling rates of up to 200Hz).
A flow range between ±400 sccm can directly be
mea-sured by connecting the ASF1400. To increase
the range, a bypass can be used in conjunction with
the ASF1400 device (see Section 1.4 of this data
sheet).
In addition to mass flow, the ASF1400 device
provides information about the temperature on the
CMOSens
temperature data are accessed through an RS-232 or
SPI interface. The RS-232 interface allows you to
directly connect the ASF1400 device to a PC or PDA
using standard terminal software. The serial
peripheral interface (SPI) also enables the ASF1400
to be used in smaller systems. If a special interface
such as 4-20 mA current output or other is required
contact Sensirion for a customer specific solution.
www.sensirion.com
3
gas per minute can be measured. Covering
®
sensor element. Both mass flow and
®
Version 2.1
In general, all gas types can be measured using the
ASF1400 product. However, the standard calibration
gas is nitrogen. Please contact SENSIRION, if you
would like to use the sensor for applications with other
gases.
To get you started quickly, an evaluation package
including ASF1400 devices, software, cables, rubber
hose and bypass is available from Sensirion AG.
CMOSens
CMOSens
multi sensor modules and sensor systems. The
unification of semiconductor chip and sensor
technology serves as a platform for highly integrated
system solutions with excellent sensor precision and
reliability. With CMOSens
element forms an integrated whole with a high-end
amplification and A/D converter circuit. Due to the
compact single-chip design, CMOSens
sensors are very resistant to electromagnetic
disturbances (EMC), another important technical
advantage of this state of the art sensor technology.
As a result, CMOSens
offer excellent sensor precision, fast response time
and a very large dynamic measurement range. In
addition, the digital intelligence of the CMOSens
sensor technology enables digital interfaces that
permit an easy link with the system of the customer, a
real advantage and benefit that results in ready-to-use
problem solutions (“Mount&Sense”).
®
is the base technology for all Sensirion
®
sensor technology
®
based multi sensor modules
®
, the on-chip sensor
®
based
2/11
®