The 871CR sensors are high performance, precision probes used for measurements ranging from ultrapure water (18+ M ohm•cm) through pure water and up to water supplies with conductivity values as high as 20 mS/cm.
Two cell factors are offered, 0.1 cm-1 and 10 cm-1. The 0.1 cm-1 types are used for resistivity measurements and any conductivity measurements below 200 uS/cm. They are offered with either titanium or monel electrode materials. The 10 cm-1 types are used for higher conductivity measurements above 200 uS/cm, and employ graphite electrodes covered with a removable metal sheath.
For pure and ultrapure water measurements, the 871CR sensors provide the highest possible accuracy. Each 0.1 cm-1 sensor is individually characterized and labeled with a 0.1% accurate cell factor value. The built-in temperature sensor is a high accuracy, 3-wire, 1000 ohm platinum RTD. The threaded bushing material is plastic to resist temperature offsets caused by swings in ambient temperature.
Several mounting styles are available, including threaded bushing (3/4 inch and 1 inch NPT), Tri-clamp sanitary, universal with O-ring seal and retractable with a ball valve or gate valve assembly. The universal bore piece mounting design prevents cable wind-up during installation and removal. Several mounting accessories are also offered, including flow chambers, threaded bushings and flanges. For optimized sampling, the 871CR sensors are provided in several different insertion lengths.
The 871CR sensors are compatible with 875CR analyzers and 870ITCR transmitters. They are not compatible with 873CC, 873RS, 873ACC or 873ARS analyzers.
