July 3, 2012—Sensorex introduces Calomel-Free pH Sensor Electrodes without hazardous mercury. 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. 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.
