Total input/out isolation, expandable ranges. Very stabel operation, even at 1.4pH full scale expansion. Can be interfaced with many different kinds of pH sensors.
	GPC Transmitter Conductivity Circuit Card Electronic ranges of 100 to 100,000 µMhos with a 1.0 cell constant Can be powered with a single DC supply, has 0-5V and 4-2OmA output signals Temperature compensation slope adjust allows accurate measurement in a wide variety of solutions
	Model 9121 Two-Wire pH/ORP Transmitter True 2-wire transmitter - reduces wiring and installation cost. Input/Output isolated 4-20ma signal. Corrosion resistant, waterproof NEMA 4X design. May be retrofitted to most sensor installations. Optional dual scale analog and digital meters available. Any 1.4 pH (400mv) or greater fraction of input range expandable to full 4-20ma output. Three operating modes - STANDBY, 0-14 pH, and EXPANDED allow startup and periodic calibration with readily available buffers and ORP standards. Instruments for pH and ORP are identical except for meter scale, which simplifies spares for multiple loop installations.
	Model CT98 Conductivity Analyzer Low cost Analog display Alarm relays Low maintenance