The Signet 2774 pH Electrodes feature a unique foul proof DryLoc connector with gold-plated contacts designed specifically For use with the Signet 2750 and 2760 preamplifiers and sensor electronics. These dependable and highly responsive electrodes feature a PTFE double reference junction with KNO3 in the front chamber to block various poisoning ions. Embedded positioning of the temperature element in the pH sensing tip allows the temperature response to be quick and accurate. The electrodes are offered with either flat or bulb style sensing elements. The flat versions allow sediment and particles to sweep past the measurement surface, minimizing risks of abrasion, breakage and coating. The bulb versions can be used For general purpose applications. Due to the specially designed chambers which keep electrolyte in place, all versions can be mounted at any angle, even inverted. PT1000 RTD For connection to the 8900, 9900 or Probus Concentrator when used with the 2750 sensor electronics. The 2750 sensor electronics has a digital output which is used with the 8900 Controller, 9900 Transmitter, and the Probus Concentrator. It also has a 4 to 20 mA output For connections to PLC�s, data recorders, etc.