Bridge Pod

Bridge Pod

The ML301Bridge Pod is a low-cost signal conditioner designed to work with bridge-type transducers and PowerLab data acquisition systems. The Bridge Pod provides a stable +2.5 V excitation source for full-bridge strain-gauge transducers. A 300 Hz low-pass filter is built-in to reduce signal noise and a manual DC offset adjustment is provided. This bridge pods is suitable for typical measurements using strain-gauge transducers such as force, smooth muscle contractions, displacement, animal arterial and venous pressure.

Item# Description U.S. List Price Quantity
77-0034 Bridge Pod, Model ML301
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The ML301Bridge Pod is a low-cost signal conditioner designed to work with bridge-type transducers and PowerLab data acquisition systems. The Bridge Pod provides a stable +2.5 V excitation source for full-bridge strain-gauge transducers. A 300 Hz low-pass filter is built-in to reduce signal noise and a manual DC offset adjustment is provided. This bridge pods is suitable for typical measurements using strain-gauge transducers such as force, smooth muscle contractions, displacement, animal arterial and venous pressure.


Transducer Capability:

The following are some of the transducers suitable for use with the ML301 Bridge Pod:

• MLT1030/A Wide Range Force Transducer (10 mg - 1 kg)

• MLT0380/A Reusable Blood Pressure Transducer

• MLT0202 Sensitive Force Transducer (0-25g)

System Compatibility:

The Bridge Pod connects to any PowerLab hardware units with Pod ports (8-pin DIN inputs). PowerLab and MacLab (except 4s, 8s and 16s) units without Pod ports require the FE305 Pod Expander.

The ML301 Bridge Pod is supported by the following versions of LabChart and Scope software:

WINDOWS

• LabChart v3.4.8 or later

• Scope v3.6.3 or later

MACINTOSH

• LabChart v3.6.3 or later

• Scope v3.6.3 or later

Note: Earlier software versions do not support Pods.

Theory of Operation:

The Bridge Pod provides excitation and signal amplification for strain-gauge transducers in a single device. An excitation voltage of 2.5 V is applied to the transducer with the transducer output signal being differentially amplified and then low pass filtered to remove high frequency signals. Offset adjustment is provided by a 10-turn potentiometer on the front of the Bridge Pod, allowing transducer offsets or pretension load signals to be removed before recording. The offset control provides ±200 mV of offset range (at input) on the low gain setting and ±20 mV of offset range (at input) on the high gain setting.

Stacking and Unstacking Pods:

Pods stack by clicking into place on top of each other. To separate stacked Pods, push the top Pod towards the back and then pull them apart from the back.
Specifications77-0034
Amplifier Noise<1 V RMS (10 Hz bandwidth)
Cable Length Metric1.5 m
CertificationsCE
DC Offset Adjustment Range±200 mV, 10-turn potentiometer, software selectable
Enclosure Size L x W x H English27.4 x 14.73 x 8.9 in
Enclosure Size L x W x H Metric108 x 58 x 35 mm
Filtering Low Pass Filter300 Hz, 3rd order Bessel
Input Amplification Ranges200 µV to 20 mV in 1:2:5 steps x10 Gain selected)

50 mV to 200 mV in 1:2:5 steps (x10 Gain deselected)
Input Connection Type5-pin mini audio connector
Input DC Drift2 µV/°C
Input DC Excitation2.5 V nominal
Input Impedance~470 K || 3 pF Differential
Minimum Load Resistance300Ω
ModelML301
Operating Conditions0 to 35 °C, 0 to 90 % humidity (non-condensing)
Package1
Product FamilyData Acquisition
Weight Metric~200 g