Ag/AgCl Reference Electrode | Product Details

ELECTROCHEMICAL REFERENCE ELECTRODES

Ag/AgCl Reference Electrode

An Ag/AgCl reference electrode series for neutral solutions, including standard, miniature, L-shaped, extended-length, all-PTFE, and double-salt-bridge configurations.

Product Overview

The Ag/AgCl reference electrode uses an Ag/AgCl reference system and is suitable for electrochemical testing in neutral solutions. Different models provide different tube diameters, lengths, shaft structures, and salt bridge configurations for various electrochemical cells and experimental environments.

Electrode TypeAg/AgCl Reference Electrode

Recommended MediumNeutral solutions

Common Filling Solution3.0 M potassium chloride

ConfigurationsGlass tube, all-PTFE, double salt bridge, and L-shaped

Configurations

Standard type: suitable for routine electrochemical testing.
All-PTFE type: highly corrosion-resistant and suitable for specialized equipment.
Extended type: suitable for deeper cells or remote installation.
Miniature and L-shaped types: suitable for small cells, narrow spaces, and special installation positions.
Double-salt-bridge type: extends and buffers the liquid pathway while reducing the risk of sample contamination.

Applications

Three-electrode systems with electrochemical workstations.
Cyclic voltammetry, potentiostatic, and impedance testing.
Corrosion, electrodeposition, electrocatalysis, and materials research.
Neutral aqueous solutions and test systems requiring salt bridge protection.

Although Ag/AgCl and calomel electrodes may also be used with acidic or alkaline samples, strong acids and bases can shorten service life. Use with a salt bridge is recommended.

Filling Procedure

Remove the glass tube and add an appropriate amount of filling solution inside the tube.
Add filling solution to the PTFE sleeve or PTFE cap.
Reinsert the glass tube into the PTFE sleeve and allow the liquid levels on both sides to equilibrate.
Before use, hold the electrode upright and gently tap the tube so internal bubbles rise and disappear.

Precautions

During measurement, the internal salt bridge liquid level should be higher than the sample liquid level to prevent reverse permeation.
Avoid samples that react with the filling solution and form precipitates, which may block the porous ceramic junction.
Clean the electrode and replace the filling solution regularly to keep the liquid pathway open.
Some internal substances may be toxic and salt bridge solutions may be corrosive. Follow laboratory safety procedures.

Storage and Care

For short-term storage, immerse the electrode in the same filling solution used inside the electrode.
For long-term storage, cover the protective cap and store the electrode away from light.
A salt bridge may be added when required to extend, buffer, and protect the reference system.
Select the salt bridge filling solution according to the sample and experimental system.

Frequently Asked Questions

What solutions are suitable for an Ag/AgCl reference electrode?

It is mainly suitable for neutral solutions. For acidic or alkaline systems, use a salt bridge to reduce the impact on service life.

Why must bubbles be removed before use?

Bubbles may interrupt the internal ion pathway and cause potential drift or unstable measurements.

Why should the internal liquid level be higher than the sample?

Maintaining a positive hydraulic pressure difference helps reduce reverse penetration of the sample and contamination of the internal filling solution.

What is the purpose of a salt bridge?

A salt bridge extends the electrode, buffers liquid contact, and reduces contamination of the reference system by the sample.

Ag/AgCl Reference Electrode ' Specifications and Prices

ELECTROCHEMICAL REFERENCE ELECTRODES

Ag/AgCl Reference Electrode

Ag/AgCl reference electrode series for neutral solutions and electrochemical testing equipment.

Neutral Solutions3.0 M KCl Filling SolutionMultiple ConfigurationsSalt Bridge Protection

Specifications and Price Table

Product Name	Model / Type	Size / Configuration	Structure / Application	Sale Price (USD)
Ag/AgCl Reference Electrode	CHI111 Ag/AgCl	Φ4 × 50 mm	3.0 M KCl filling solution	$40
	SHI111 Ag/AgCl	Φ4 × 45 mm	Standard type	$26
	R218 Ag/AgCl	Φ6 × 65 mm	Regular type	$22
	R218-A Ag/AgCl	6 × 100 mm	Extended type	$38
	R0301 Ag/AgCl	All-PTFE Φ6 mm	All-PTFE configuration	$53
	R0302 Ag/AgCl	Φ4 × 100 mm	Extended type	$26
	R0303 Ag/AgCl	Φ3.8 × 50 mm	Miniature configuration	$24
	R0303 Ag/AgCl	Φ3.8 × 70 mm	Miniature extended configuration	$26
	R0303-F Ag/AgCl	All-PTFE Φ6 mm	All-PTFE configuration	$46
	R0305 Saturated Ag/AgCl	Φ6 × 65 mm	Saturated Ag/AgCl type	$28
	R0305-A Saturated Ag/AgCl	6 × 100 mm	Saturated extended type	$38
	R0306 Ag/AgCl	Φ6 × 70 mm	Regular type	$26
	R0306 Ag/AgCl	Φ6 × 100 mm	Extended type	$36
	R0306 Ag/AgCl	Φ6 × 140 mm	Long-shaft type	$38
	Double-Salt-Bridge Ag/AgCl Electrode	R218 + salt bridge	Double-salt-bridge configuration	$40
		R0303 + salt bridge	Double-salt-bridge configuration	$36
		R0306 + salt bridge	Double-salt-bridge configuration	$38
	Miniature Ag/AgCl	Φ3.8 × 15 mm	Miniature configuration	$34
	Miniature Extended Type	Φ3.8 × 20 mm	Miniature extended configuration	$34
	Miniature Ag/AgCl	Φ3.8 × 25 mm	Miniature configuration	$34
	L-Shaped Miniature Ag/AgCl	Φ3.8 × 30 mm	L-shaped miniature configuration	$34
	L-Shaped Ag/AgCl	Φ3.8 × 100 mm	L-shaped extended configuration	$34
	L-Shaped Ag/AgCl	Φ6 × 70 mm	L-shaped configuration	$30
	L-Shaped Ag/AgCl	Φ6 × 100 mm	L-shaped extended configuration	$34

For acidic, alkaline, or precipitation-prone systems, use a salt bridge where appropriate and remove internal bubbles before operation. USD prices are calculated as the CNY price divided by 5 and rounded to the nearest whole dollar.

Purchase Channels

Amazon

Browse Ag/AgCl reference electrodes by configuration, diameter, and length.

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eBay

Suitable for laboratory, teaching, and research procurement.

eBay

AliExpress

Contact us for extended lengths, all-PTFE bodies, double salt bridges, or customized configurations.

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Partial references citing our materials (from Google Scholar)

Google Scholar - SCI Materials Hub.jpg

Carbon Dioxide Reduction

1. ACS Nano Strain Relaxation in Metal Alloy Catalysts Steers the Product Selectivity of Electrocatalytic CO₂ Reduction

The bipolar membrane (Fumasep FBM) in this paper was purchased from SCI Materials Hub, which was used in rechargeable Zn-CO₂ battery tests. The authors reported a strain relaxation strategy to determine lattice strains in bimetal MNi alloys (M = Pd, Ag, and Au) and realized an outstanding CO₂-to-CO Faradaic efficiency of 96.6% with outstanding activity and durability toward a Zn-CO₂ battery.

2. Front. Chem. Boosting Electrochemical Carbon Dioxide Reduction on Atomically Dispersed Nickel Catalyst

In this paper, Vulcan XC-72R was purchased from SCI Materials Hub. Vulcan XC 72R carbon is the most common catalyst support used in the anode and cathode electrodes of Polymer Electrolyte Membrane Fuel Cells (PEMFC), Direct Methanol Fuel Cells (DMFC), Alkaline Fuel Cells (AFC), Microbial Fuel Cells (MFC), Phosphoric Acid Fuel Cells (PAFC), and many more!

3. Adv. Mater. Partially Nitrided Ni Nanoclusters Achieve Energy-Efficient Electrocatalytic CO₂ Reduction to CO at Ultralow Overpotential

An AEM membrane (Sustainion X37-50 Grade RT, purchased from SCI Materials Hub) was activated in 1 M KOH for 24 h, washed with ultra-purity water prior to use.

4. Adv. Funct. Mater. Nanoconfined Molecular Catalysts in Integrated Gas Diffusion Electrodes for High-Current-Density CO₂ Electroreduction

In this paper (Supporting Information), an anion exchanged membrane (Fumasep FAB-PK-130 obtained from SCI Materials Hub (www.scimaterials.cn)) was used to separate the catholyte and anolyte chambers.

SCI Materials Hub: we also recommend our Fumasep FAB-PK-75 for the use in a flow cell.

5. Appl. Catal. B Efficient utilization of nickel single atoms for CO₂ electroreduction by constructing 3D interconnected nitrogen-doped carbon tube network

In this paper, the Nafion 117 membrane was obtained from SCI Materials Hub.

6. Vacuum Modulable Cu(0)/Cu(I)/Cu(II) sites of Cu/C catalysts derived from MOF for highly selective CO₂ electroreduction to hydrocarbons

In this paper, Proton exchange membrane (Nafion 117), Nafion D520, and Toray 060 carbon paper were purchased from SCI Materials Hub.

7. National Science Review Confinement of ionomer for electrocatalytic CO2 reduction reaction via efficient mass transfer pathways

An anion exchange membrane (PiperION-A15-HCO3) was obtained from SCI Materials Hub.

8. Catalysis Communications Facilitating CO2 electroreduction to C2H4 through facile regulating {100} & {111} grain boundary of Cu2O

Carbon paper (TGPH060), membrane solution (Nafion D520), and ionic membrane (Nafion N117) were obtained from Wuhu Eryi Material Technology Co., Ltd (a company under SCI Materials Hub).

Batteries

1. J. Mater. Chem. A Blocking polysulfides with a Janus Fe3C/N-CNF@RGO electrode via physiochemical confinement and catalytic conversion for high-performance lithium–sulfur batteries

Graphene oxide (GO) in this paper was obtained from SCI Materials Hub. The authors introduced a Janus Fe3C/N-CNF@RGO electrode consisting of 1D Fe3C decorated N-doped carbon nanofibers (Fe3C/N-CNFs) side and 2D reduced graphene oxide (RGO) side as the free-standing carrier of Li2S6 catholyte to improve the overall electrochemical performance of Li-S batteries.

2. Joule A high-voltage and stable zinc-air battery enabled by dual-hydrophobic-induced proton shuttle shielding

This paper used more than 10 kinds of materials from SCI Materials Hub and the authors gave detailed properity comparsion.

The commercial IEMs of Fumasep FAB-PK-130 and Nafion N117 were obtained from SCI Materials Hub.

Gas diffusion layers of GDL340 (CeTech) and SGL39BC (Sigracet) and Nafion dispersion (Nafion D520) were obtained from SCI Materials Hub.

Zn foil (100 mm thickness) and Zn powder were obtained from the SCI Materials Hub.

Commercial 20% Pt/C, 40% Pt/C and IrO2 catalysts were also obtained from SCI Materials Hub.

3. Journal of Energy Chemistry Vanadium oxide nanospheres encapsulated in N-doped carbon nanofibers with morphology and defect dual-engineering toward advanced aqueous zinc-ion batteries

In this paper, carbon cloth (W0S1011) was obtained from SCI Materials Hub. The flexible carbon cloth matrix guaranteed the stabilization of the electrode and improved the conductivity of the cathode.

4. Energy Storage Materials Defect-abundant commercializable 3D carbon papers for fabricating composite Li anode with high loading and long life

The 3D carbon paper (TGPH060 raw paper) were purchased from SCI Materials Hub.

5. Nanomaterials A Stable Rechargeable Aqueous Zn–Air Battery Enabled by Heterogeneous MoS2 Cathode Catalysts

Nafion D520 (5 wt%), and carbon paper (GDL340) were received from SCI-Materials-Hub.

6. SSRN An Axially Directed Cobalt-Phthalocyanine Covalent Organic Polymer as High-Efficient Bifunctional Catalyst for Zn-Air Battery

Carbon cloth (W0S1011) and other electrochemical consumables required for air cathode were provided by SCI Materials Hub.

Oxygen Reduction Reaction

1. J. Chem. Eng. Superior Efficiency Hydrogen Peroxide Production in Acidic Media through Epoxy Group Adjacent to Co-O/C Active Centers on Carbon Black

In this paper, Vulcan XC 72 carbon black, ion membrane (Nafion N115, 127 μL), Nafion solution (D520, 5 wt%), and carbon paper (AvCarb GDS 2230 and Spectracarb 2050A-1050) were purchased from SCI Materials Hub.

2. Journal of Colloid and Interface Science Gaining insight into the impact of electronic property and interface electrostatic field on ORR kinetics in alloy engineering via theoretical prognostication and experimental validation

The 20 wt% Pt3M (M = Cr, Co, Cu, Pd, Sn, and Ir) were purchased from SCI Materials Hub. This work places emphasis on the kinetics of the ORR concerning Pt3M (M = Cr, Co, Cu, Pd, Sn, and Ir) catalysts, and integrates theoretical prognostication and experimental validation to illuminate the fundamental principles of alloy engineering.

Water Electrolysis

1. International Journal of Hydrogen Energy Gold as an efficient hydrogen isotope separation catalyst in proton exchange membrane water electrolysis

The cathodic catalysts of Pt/C (20 wt%, 2–3 nm) and Au/C (20 wt%, 4–5 nm) were purchased from SCI Materials Hub.

2. Small Science Silver Compositing Boosts Water Electrolysis Activity and Durability of RuO2 in a Proton-Exchange-Membrane Water Electrolyzer

Two fiber felts (0.35 mm thickness, SCI Materials Hub) were used as the porous transport layers at both the cathode and the anode.

3. Advanced Functional Materials Hierarchical Crystalline/Amorphous Heterostructure MoNi/NiMoOx for Electrochemical Hydrogen Evolution with Industry-Level Activity and Stability

Anion-exchange membrane (FAA-3-PK-130) was obtained from SCI Materials Hub website.

Fuel Cells

1. Polymer Sub-two-micron ultrathin proton exchange membrane with reinforced mechanical strength

Gas diffusion electrode (60% Pt/C, Carbon paper) was purchased from SCI Materials Hub.

Characterization

1. Chemical Engineering Journal Electrochemical reconstitution of Prussian blue analogue for coupling furfural electro-oxidation with photo-assisted hydrogen evolution reaction

An Au nanoparticle film was deposited on the total reflecting plane of a single reflection ATR crystal (SCI Materials Hub, Wuhu, China) via sputter coater.