pH Pod

Overview:

The ML303 pH Pod is a high input impedance amplifier suitable for connection to combination pH or Redox electrodes. The pH Pod is suitable for monitoring pH or other potentiometric signals.

The pH Pod is suitable for operation with the following types of electrodes:
 

• Glass pH and combination electrodes: MLA042 pH Electrode and MLT5733 pH Electrode - Tuff tip
• Potentiometric redox: MLA060 Redox Electrode
• Ion selective electrodes (Ca²⁺, Na⁺, K⁺, Cl^-, NO^-3, etc.)

Hardware:
ADInstruments signal conditioners only function with PowerLab data acquisition units and therefore are not suitable for use with other data acquisition systems.

Features:

• An electrometer amplifier configured as a non-inverting, unity gain, high input impedance buffer.
• 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.

Applications:

Monitoring pH or other potentiometric signals.

Specifications:

• Input impedance: 10¹³ Ω
• Input ranges: 2 V, 1 V, 500 mV, 200 mV
• Gain accuracy: 0.5 % or better on all Gain ranges
• DC drift <5 μV/°C
• Frequency response: DC–10 Hz
• Low-pass filter ranges (E series): 10 Hz 2nd order Bessel (fixed) (S series): 10, 5 and 2 Hz (5 & 2 Hz by digital filtering)
• DC offset error (maximum): <0.1 % full scale
• Amplifier noise: <6 μV p-p (0.1 Hz to 10 Hz)
• Input connector: BNC
• Dimensions (l x w x h): 108 x 58 x 35 mm
• Weight: 200 g

All specifications were tested at the time of printing and are subject to change.