TSI thermal mass owmeters incorporate a proprietary platinum lm
sensor design for measuring gas ows in applications demanding fast
response and high accuracy over a wide ow range. TSI owmeters have
turn-down ratios greater than 1000:1 due to our thermal ow sensing
technology and extensive gas calibration process. The TSI 4000 Series
was designed for ultra-low pressure loss to minimize any undesirable
eects the owmeter can have on the readings when installed in-circuit.
Industries
+ Medical
– Ventilators
– Anesthesia
– CPAP
+ Environmental
+ Analytical
+ Aerosol Science
Applications
+ Product Development
+ Manufacturing
+ Research
+ Field Service
+ Quality Assurance
Features
+ 4 millisecond ow response
+ High accuracy ±2% of reading
+ High turndown ratio
+ Low pressure drop
+ Convenient analog output of ow rate
+ Versatile digital output of ow rate, volume, pressure, temperature
+ Built-in temperature and pressure compensation
+ NIST-traceable calibration certicate included at no additional cost
RS232 Interface For Digital Outputs and Congurable Device Options
+ Set analog output zero and scaling
+ Specify start/stop trigger levels for volume measurement
+ Set update rate for LCD display
+ Set sampling rate for analog and digital outputs
+ Select gas calibration
+ Select either standard or volumetric ow measurement
+ Set display units for Model 4140/4143 to L/min or cm3/min
+ Compute volume
Accurate
A owmeter specied as ±2% of full scale
is most accurate at full scale. If full scale
is 300 L/min, then the uncertainty for all
readings is ±6 L/min. TSI owmeters are
specied as ±2% of reading and have an
uncertainty of ±2% of the actual reading
from full scale all the way down to a
specied lower limit. TSI owmeters,
therefore, provide dependable accuracy
over a wide range of ow rates. One TSI
owmeter covers the same range as three
or more “percent of full scale” devices...
with better accuracy at all points!
Fast
Fast 4 millisecond response ensures accuracy
in uctuating ows. This fast response is
ideal for closed-loop control systems and
integrated volume measurements. Pressure
and temperature measurements are
also extremely fast.
Low Pressure Drop
Low pressure drop minimizes ow circuit back
pressure and its impact on the system under test.
Page 3
SPECIFICATIONS – DIGITAL DISPLAY MODELS
Low Flow – 4140 SeriesHigh Flow – 4040 Series
Model
Gas Calibration
Inlet/Outlet Diameter
4140141404140341434143340401404040434045
AirAir, O
Air, O2, N
N2O
2,
Air, O
, N
2
2
Air, O2, N
N2O
2,
AirAir, O
, N2, Air/O2 Mixture
2
, N
2
2
0.25” (6.4 mm)0.375” (9.53 mm)22 mm ISO tapered
Range0.01-20 Std L/min0-300 Std L/min
Flow
Measurement
Accuracy — Air or O
Accuracy — N
Accuracy — Air/O
Accuracy — N
2
mixture
O
2
±2% of reading or 0.005 Std L/min,
2
whichever is greater
±3% of reading or 0.010 Std L/min, whichever is greater
2
N/AN/A
±3% of
reading
N/AN/A
or 0.010
Std L/min,
whichever
is greater
N/A
±3% of
reading
or 0.010
Std L/min,
whichever
is greater
±2% of reading or 0.05 Std L/min, whichever is greater
±3% of reading or 0.1 Std L/min,
whichever is greater
±3% of reading or 0.1 Std L/min,
whichever is greater
N/A
Response4 ms to 63% of full scale ow4 ms to 63% of full scale ow
5
LCD Display Units
L/min, Std L/min, cm
3
/min, Std cm3/minL/min, Std L/min
Overall Dimensions5” x 2” x 1.25” (127 mm x 49 mm x 32 mm)7.2” x 2.5” x 2.1” (182 x 63 x 53 mm)
Volume*
Measurement
Range0.01 – 99.9 liters0.01 – 99.9 liters
Accuracy
±2% of reading (see Operator’s Manual for additional details)±2% of reading (see Operator’s Manual for additional details)
0.50”
(12.7 mm)
0-200 Std
L/min
0.75”
(19.1 mm)
0-300 Std
L/min
Range50-199 kPa absolute50-199 kPa absolute
Pressure
Measurement
Accuracy
Response
±1 kPa±1 kPa
<4 ms to 63% of nal value for step charge<4 ms to 63% of nal value for step charge
Range0-50°C0-50°C
Temperature
Measurement
Accuracy
Response
Analog
±1°C at ow greater than 1 Std L/min±1°C at ow greater than 1 Std L/min
<75 ms to 63% of nal value for step change<75 ms to 63% of nal value for step change
0-10 VDC ow only, zero and span adjustable via RS2320-10 VDC ow only, zero and span adjustable via RS232
Output s
DigitalRS232RS232
DC Power Input
*Supplied through RS232 port only.
Specications subject to change without notice.
See Operator’s Manual for full listing.
7.5 VDC ±1.5 V, 300 mA max7.5 VDC ±1.5 V, 300 mA max
Page 4
ACCESSORIES
Shown with
optional
Carrying Case
AccessoriesDescriptionTSI Part Number
P/N 8918-NA (North America)
P/N 8918-EC (Continental Europe)
Power Supply
P/N 8918-GB (United Kingdom)
P/N 8918-AT (Australia)
Computer Cable (mini-DIN to 9-Pin D-Sub)P/N 1303583
Analog Cable (mini-Din to tinned-wire)P/N 1303584
RS232 Serial Command Set ManualP/N 1980340
Supplied
P/N 1980339 (404x Series)
Operator’s Manual
P/N 1980383 (414x Series)
Shown with Optional Battery
Pack/Stand
Calibration CerticateNo P/N assigned
Inlet Filter
Battery Pack/Stand for all ModelsP/N 4199 (includes six AA-size batteries)
Optional
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TSI Incorporated.