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BIOPAC Hardware | Pneumotach 200 Series | Page 1 - 1 Updated: 12.2.2013
PNEUMOTACH 200 SERIES AIRFLOW TRANSDUCERS
These flow transducers are designed for humans and animals ranging in
size from mice to medium-sized dogs. They include a detachable flow
head (RX237B through H) and a differential pressure transducer
(TSD160A or SS40L).
AVAILABLE FLOW RA
TES
17 ml/sec Mouse/Rat
167 ml/sec Cat/Rabbit
1.67 L/sec
Medium Dog
16.7 L/sec Human
Lightweight and robust
Linear and direction sensitive
Twin, non kink silicone tubing
Economical, sensitive and robust
Easily cleaned, disinfected or sterilized
For cleaning instructions, see the Cleaning Guidelines.
MRI Usage: MR Conditional
Condition: Animal use only. Contains ferrous material – must be clamped down in the safe MRI
operating area.
RX237 SERIES REPLACEMENT AIRFLOW HEADS
For TSD237 and SSLA Series Pneumotachs
Detachable fl
ow heads in are machined from
acetal to give good stability with low weight and have found
application in pediatrics and in the respiration measurement of animals such as dogs, cats, rats and mice.
TSD/SSLA/RX237 SERIES SPECIFICATIONS
BIOPAC Part #
Transducer Flowhead
Flowhead
Type
Dead
Space
(ml)
Linear
Range
L/min
Approx.
Flow for
10mm WG
Tube
(OD
mm)
Length
(mm)
Weight
(gm)
TSD237B/SS46LA RX237B F1L 0.6 ± 1 1.2 L/min 5 40 14
TSD237D/SS48LA RX237D F10L 2 ± 10 12 L/min 8 54 22
TSD237F/SS50LA RX237F F100L 9 ± 100 90 L/min 16 54 38
TSD237H RX237H F1000L 320 ± 1000 550 L/min 29.5 198 230
Note: One of the problems historically encountered with pneumotachographs is condensation from expired air.
This can be prevented by fitting a non-return valve and measuring only inspiration or alternatively by
heating the flowhead, but viscosity errors may arise (from which in the first few breaths especially)
preheat the inspired air most uncomfortably. In this range of flow heads, the problem is approached
from a fresh angle. By mounting fine stainless steel gauze in plastic rings, thermal inertia is greatly
reduced. The gauze therefore rapidly equilibrates in temperature with passing air and condensation is
minimal.
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