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BIOPAC Hardware | SS11LA & TSD117 | Page 1 - 7 Updated: 12.2.2013
MEDIUM-FLOW PNEUMOTACH TRANSDUCER
SS11LA for MP3X and MP45 System
TSD117 & TSD117-MRI for MP150/MP100 System
RX
117 Replacement Airflow Head
See also: AFT series of accessories for airflow and gas analysis
These medium-flow airflow transducers are designed to measure human subject
respiratory, bi-directional airflow (liters/sec) and can be used to measure respiratory
flow in a wide range of tests and conditions relating to airflow and lung volume.
Volume measurements are obtained by integrating the airflow signal. The airflow
transducer is lightweight, easily held in one hand, and has a removable head for
sterilization and replacement. For reasons of hygiene, it is important that only one
person use each disposable mouthpiece and disposable filter.
The SS11LA/TSD117 airflow transducers include an optically clear detachable flow
head (RX117) for easy cleaning and inspection. As the detachable flow head is snapped into the transducer
handle, the flow head plugs directly into an integral, precision low-differential pressure transducer. Accordingly,
the transducers will output an electrical signal proportional to respiratory flow. Use with the AFT22 Non-
Rebreathing “T” valve for low dead space requirements.
SS11LA needs 5-10 minutes to
warm up; during this time, the
baseline offset changes slightly.
The transducers connect to industry standard bacteriological filter AFT1 with disposable mouthpiece AFT2 or
AFT13 filter and mouthpiece with AFT11H coupler. T
he RX117 detachable flow head can be cold sterilized,
autoclaved (220 F max), or placed in a dishwasher.
For airflow and lung volume measurements, use the airflow transducer with the AFT2 mouthpiece and
the AFT1 bacterial filter.
For measurements of expired gases, use the airflow transducer with the AFT22 non-rebreathing T valve
with AFT10 facemask and the AFT15A or AFT15B mixing chambers.
All connections can be performed with AFT12 (22mm ID) tubing and AFT11 series couplers.
Please note the following:
a) The bacterial filter and mouthpiece are disposable and are “one per person” items. Please use a new
disposable filter and mouthpiece each time a different person is to be breathing through the airflow
transducer.
b) For more effective calibration, use a bacterial filter between the calibration syringe and the airflow
transducer.
Normal Measurement Connections
SSLA plugs directly into the MP3X or MP45 unit
TSD117 plugs directly into the DA100C amplifier module
TSD117-MRI plugs into MECMRI-DA cable to DA100C amplifier module
Air Flow Transducer
Mouthpiece and
Bacterial Filter
Vertical
Orientation
For the most accurate lung volume recording, be sure to use a noseclip to prevent airflow through the nose. Also,
be sure not to remove the airflow transducer assembly from the mouth during the recording. All air leaving or
entering the lungs must pass through the airflow transducer during the lung volume measurement.
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