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Micro pH Electrode LabSen®241-3 APERA (4 mm diameter) for samples up to 30 microliters

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Glass micro pH electrode with 4 mm cylindrical membrane for microvolume samples, NMR tubes, microplates, and microcentrifuge applications

  • Unique cylindrical glass membrane design (4 mm diameter) for easy micro-sample pH testing
  • Temperature tested up to 212°F with stainless steel protective cap
  • Long-life reference system with AgCl and silver reference wire for extended electrode lifetime
  • Cotton-filled top end prevents AgCl and electrolyte reaction during temperature changes
  • BNC connector compatible with Apera Instruments pH meters (MP511, PH850, PH8500, PH700, PH910, PH950, PH820, PC820)
  • Lead-free glass construction
  • Ceramic junction for reliable ion transfer

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LabSen® 241-3 Glass Micro pH Electrode, supported by patented Swiss pH sensor technology and materials, is specifically designed for microvolume samples (≥30 microliters) including NMR sample tubes, microplates, microcentrifuge tubes, and microbiological specimens. The electrode features a unique micro cylindrical glass membrane (4 mm diameter) that simplifies micro-sample pH testing and can be used in high-temperature samples (up to 212°F). A stainless steel protective cap ensures durability of the thin glass tube.

Technical Specifications

Material Lead-free glass
Temperature Sensor No
Junction Type Ceramic
Reference System Long-life
Electrolyte 3M KCl
Length 130 mm
Diameter 12-3 mm
Membrane Shape Cylindrical
pH Range 0-14
Temperature Range 0 to 100°C (32 to 212°F)
Connector Type BNC
Cable Length 1 m

Applications

  • NMR sample tube pH measurement
  • Microplate well analysis
  • Microcentrifuge sample testing
  • Microbiological specimen pH determination
  • High-temperature sample analysis
  • Microvolume research applications

Frequently Asked Questions

Is a temperature sensor built into this electrode?
No, the LabSen® 241-3 does not have a built-in temperature sensor. Users must use a separate temperature probe (such as MP500) and enable ATC (Automatic Temperature Compensation) or manually input temperature values in compatible pH meters.
Which pH meters is this electrode compatible with?
The electrode uses a BNC connector and is compatible with Apera Instruments pH meters including MP511, PH850, PH8500, PH700, PH910, PH950, PH820, and PC820.
What is the minimum sample volume required?
The electrode is designed for microvolume samples of 30 microliters or greater.
What temperature range can this electrode tolerate?
The LabSen® 241-3 operates in a temperature range of 0 to 100°C (32 to 212°F).
How does the long-life reference system work?
The reference system consists of AgCl and a silver reference wire housed in a glass tube. The top is filled with cotton to prevent AgCl-electrolyte reactions during temperature fluctuations, improving stability and extending electrode service life.