Environmentally Friendly, High Performance “Calomel Free” pH Sensor Electrodes

New “Calomel Free” pH and Reference Electrodes from Sensorex (USA) offer the high performance levels of calomel electrodes without the hazardous mercury associated with the design.

The mercury-free electrodes are available in a glass body or in virtually unbreakable, chemically resistant thermoplastic. The “Calomel Free” design features an Ag/AgCl-based double junction reference with a unique silver ion trap that prevents contamination with the silver-sensitive sample. The reference output is adjusted to deliver the same output as Calomel electrodes using a silver chloride reference.

Versatile Calomel Free Electrodes are available in a convenient combination model featuring a pH measuring cell and reference cell in a single body, with separate reference half cells also available. They are available in both sealed and refillable reference styles. Both sealed and refillable styles are available. Gel-filled sealed references are maintenance free, while refillable designs extend electrode life with a refillable reference electrolyte.

Highly accurate Calomel Free Electrodes feature a measurement range of 0-14 pH (0-12.3 pH without Na+ error with a rapid pH response speed of >95% in 1 second. They feature an isopotential point of pH 7.00 (0 mV), an offset of ±0.20 pH and a span of 97% or higher. The electrode operates up to a maximum temperature of 140°F (60°C).

Calomel Free Electrodes are also available in several different length and diameter requirements, including the highly popular 12mm x 150 mm Epoxy Body Combination pH Sealed Reference. All laboratory electrodes from Sensorex are supplied with a 30" cable (76 cm), soaker storage bottle or soaker cap, and a BNC connector at no additional charge. The electrodes are interchangeable with virtually every make and model meter on the market today.