Products for USB Sensing and Control
Products for USB Sensing and Control


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Calgary AB  T2H 2H9
+1 403 282-7335

ASP200-2-1M-BNC pH Lab Electrode

ID: 3550_0
Recommended for new designs: Phidgets Inc. is not the original manufacturer for this product, but we intend to sell it (or a similar replacement with a compatible form, fit and function) for as long as it is available from the supplier.

This lab electrode measures the pH of a solution and connects to a pH/ORP Adapter.


Quantity Available: 124

Qty Price
5 $24.00
10 $23.00

The 3550 is an economical combination electrode ideal for your general-purpose applications in the lab or field. It has the impact-resistant qualities of an epoxy body.

The electrode provides a fast, stable response and is ideal for prolonged pH readings. The sealed, gel-filled design requires virtually no maintenance as there is no need to refill the reference chamber.

The 3550 measures 120 mm (length) x 12 mm (diameter), can withstand temperatures up to 80°C and measures pH levels from 0 to 14.

It has a 1 meter cable terminated by a BNC connector.

Comes Packaged with

  • A small bottle of buffer solution

When you receive this sensor, fill the cap with buffer solution and ensure that it has no leaks.


This probe connects to the BNC connector on our pH interface boards. See the Connection & Compatibility tab for a complete list of options.

pH/ORP Interfaces

This pH electrode creates a voltage differential that can be read by one of our pH/ORP interfaces:

Product Sensor Properties
Image Part Number Price Controlled By
1130_0B $30.00 Voltage Input (0-5V)
ADP1000_0 $25.00 VINT

Product Specifications

Electrode Properties
Electrode Type Combination Single-Junction (pH)
pH Measurement Range 0 to 14
Electrode Response Time Max 10 s
Operating Temperature Min 0 °C
Operating Temperature Max 80 °C
Physical Properties
Exterior Tube Material Impact Resistant Plastic
Connector Type BNC
Length 170 mm
Cable Length 1 m
Customs Information
Canadian HS Export Code 9027.89.00
American HTS Import Code 9027.89.45.30
Country of Origin CN (China)


Here is a complete list of the water quality probes we carry:

Product Electrode Properties Physical Properties
Image Part Number Price Electrode Type Operating Temperature Max Exterior Tube Material
3550_0 $25.00 Combination Single-Junction (pH) 80 °C Impact Resistant Plastic
3551_0 $100.00 Combination Single-Junction (pH) 110 °C PPS Plastic
3555_0 $70.00 Combination Single-Junction (ORP) 80 °C Impact Resistant Plastic
3556_0 $110.00 Combination Single-Junction (ORP) 110 °C PPS Plastic