email: Sydney, Australia Tel: +61-2-9882-2882

Transducers from Biopac

See below for Transducers from Harvard

BIOPAC transducers are designed to operate with a variety of BIOPAC amplifier modules,
but many could be used independently with appropriate power supplies and amplification.

TSD150 Active Electrodes


  • TSD150 Active Electrodes - designed for multiple-channel surface EMG measurements with a built-in high-gain amplifier
  • TSD155C Multi-lead ECG Cable - used for performing a standard 12-lead ECG recording using only 3 ECG100C amplifiers
  • TSD203 Electrodermal Response Transducer - a pair of electrodes for skin conductance recordings at the fingers

BIOPAC Pneumotach


  • TSD117 Pneumotach Air Flow Transducer - for air flow & lung volume. Eight models measuring flow rates from ±800 l/min (human) down to 12 ml/s (small mice)
  • TSD160 High Sensitivity Differential Pressure Transducer - for other pneumotachs, plethysmography boxes etc.
  • TSD201 Respiratory Effort Transducer - an unobtrusive chest strap for measuring change in human thoracic circumference during breathing

Blood pressure cuff transducer


  • TSD104A Precision Blood Pressure Transducer - an invasive direct BP transducer
  • TSD108 Physiological Sounds Microphone - ideal for detecting Korotkoff sounds in non-invasive BP measurement
  • TSD120 Blood Pressure Cuff Transducer - an adjustable cuff with pump bulb, pressure gauge and pressure transducer
  • TSD200 Photo-Electric Pulse Plethysmograph - gives a non-invasive skin blood flow waveform by reflectance of infrared

BIOPAC Precision Force Transducer


  • TSD105A Variable Range Force Transducer - ideal for isolated muscle preps, with force ranges of 50g to 1000g.
  • TSD121C Hand Dynamometer - for human hand grip or hand pull measurements up to 100 kg
  • TSD125 Precision Fixed Range Force Transducer - ideal for isolated muscle preps. Four models 50g to 500g FS.

For suitable support stands, see our Stands page.

For Harvard isometric and isotonic transducers, please see the next page.

BIOPAC Goniometers


  • TSD130A/B Twin Axis Goniometers - for measuring joint angles around two simultaneous orthogonal axes
  • TSD130C/D Torsiometers - for measuring joint rotation about a single plane
  • TSD130E Finger Goniometer - for measuring single-axis finger joint rotation

Laser Doppler Flow probes


TSD140-8 Laser Doppler Probes - a variety of probes for use with the LDF100C module

Oxygen Saturation finger probe


TSD123 Oxygen Saturation (SpO2) Transducers - for use with the OXY100C pulse oximeter module. Finger clip and adhesive mounted models.

Heel/Toe Strike transducer


  • TSD111 Heel/Toe Strike Transducer - two force-sensitive resistors attaching to the sole of a shoe for gait analysis
  • TSD115 Variable Assessment Transducer - a simple manual slide potentiometer allowing subject a graduated response to stimuli
  • TSD116 Switches - a variety of switches (hand, foot and 8-channel pushbutton box) for subject responses

Temperature transducers


TSD202 Temperature Probes - a variety of probes for use with the SKT100C amplifier.

For other temperature transducers please see our Thermometry page.

BIOPAC accelerometers


TSD109 Tri-Axial Accelerometer - two models of accelerometer for sports and orthopaedic analysis

Transducers from Harvard

Isometric and Isotonic transducers for isolated muscle preparations

Harvard Transducers are generally available with connectors to suit Harvard, Hugo Sachs,
Grass or Gould amplifiers. Adaptors to connect to the BIOPAC Data Acquisition System are also available.

Harvard Research Isometric transducer

Harvard Research Isometric transducers

A low-compliance force transducer with a dedicated amplifier.

  • Three models available: 0-5, 0-50, 0-500 g force
  • Each model also has x10 range (giving 0-0.5, 0-5 or 0-50 g force)
  • DC plug pack powered
  • Integral 3-digit display shows output voltage
Harvard Research Isotonic transducer

Harvard Research Isotonic transducer

A very low-torque rotational transducer for isotonic measurements.

  • Dedicated amplifier, DC plug pack powered
  • Supplied with balance pan and weights
  • Integral 3-digit display shows output voltage
Harvard-Hugo Sachs Force Transducer

Harvard-HSE Force Transducer

The Harvard-Hugo Sachs F30 transducer is a very sensitive isometric force transducer for use with very small preparations.

  • Range ±30 g with resolution ±2 mg
  • Displacement < 1 um/g
  • High sensitivity version available (±10 g at 6 um/g)
  • Rugged; low seismic sensitivity
Harvard-Hugo Sachs Force Transducer

Harvard-HSE Force Transducer

The Harvard-Hugo Sachs K30 transducer range measures with low displacement.

  • Four models: ±30 g; ±100 g; ±300 g; ±1000g force.
  • Low displacement (±1 to ±3 mm)
  • Robust; ideal for teaching
  • Vernier positioning controls available for exact prestretch
Harvard-Hugo Sachs Lever Isotonic Transducer

Harvard-HSE Lever Isotonic Transducer

A large displacement, low force transducer ideal for smooth muscle preparations.

  • Large linear measuring range of ±20 mm; friction torque only 0.1 mN cm
  • Easy calibration
Harvard UF1 series

Harvard UF1 Isometric Transducer

The popular UF1 series of load cells comprises rugged accurate transducers for force measurement.

  • Six ranges: 0 to 25, 55, 110, 220, 450 and 1000 g force
  • Full bridge circuit adaptable to most amplifiers or BIOPAC data acquisition system
Harvard Strain Gauge Transducer

Harvard Strain Gauge Transducer

A very low displacement series of force transducers, using thin-film bonded strain gauges.

  • Five models: 0 to 50, 100, 200, 500, 1000 g force
  • Full bridge circuit adaptable to most amplifiers or BIOPAC data acquisition system
Harvard Battery-powered Transducer

Harvard Battery-powered Transducer

This rotational transducer uses an optical vane and phototransistor, powered by an internal long-life mercury cell.

  • Lever is 90 mm long; output is linear over 50º of rotation
  • Eight holes on 5mm pitch allow attachment of preparation
Harvard Isotonic Transducer

Harvard Isotonic Transducer

This traditional isotonic transducer has a rotating lever sensed by a graduated optical vane.

  • Lever is 90 mm long; output is linear over 50º of rotation
  • Supplied with spring and anchor post

For suitable support stands, see our Stands page.

For more information and pricing details, please email us.

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