pH Pod for PowerLab

The  pH Pod is a low-cost signal conditioner designed to work with PowerLab units with Pod support. The pH Pod is a unity-gain, high-input impedance amplifier, capable of interfacing to a variety of potentiometric electrodes. The pH 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 can connect to Pods by using the FE305 Pod Expander.

The pH 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.

Transducer Compatibility:

pH Electrodes with a double junction making them easily cleaned and suitable for biological samples, in particular those of low ionic strength.  The pH Pod is suitable for operation with the following types of electrodes:

• Glass pH and combination electrodes

– MLA042 pH Electrode

– MLT5733 pH Electrode Tuff Tip

• Potentiometric redox

– MLA060 Redox Electrode

Theory of Operation:

The pH Pod consists of an electrometer amplifier configured as a non-inverting, unity gain, high input impedance buffer. As pH measurements tend to slowly change, an active 10 Hz 2nd order Bessel filter follows the input amplification stage. This filter reduces high frequency noise and, in particular, reduces mains based 50/60 Hz interference.

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.