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Honeywell 4973 and 4974 Industrial Electrolytic Conductivity Cells

Industrial Electrolytic Conductivity Cells
4973 and 4974

These cells are ruggedly constructed for reliable, continuous measurement of electrolytic conductivity in industrial water processes at temperatures up to 140°C and pressures up to 250 psig.

The cells feature polyethersulfone (PES) construction for high-corrosion resistance, with electrodes of titanium (for 0.01 and 0.1 cell constants) and high-density graphite (for 1.0 and 10.0 cell constants).

For insertion applications, the 3/4” NPT male thread permits permanent installation in a pipe or tank; the cell can also be used as a laboratory dip type for batch sampling.

For flow applications, the cell can be installed directly into a process stream, or used with a separately ordered 3/4” pipe tee in a by-pass stream. The cells have been designed to keep the electrodes and the temperature compensator immersed in the stream flow, ensuring that the cell will respond quickly and accurately to changes in both solution concentration and temperature.

• For sanitary clean-in-place (CIP) piping systems
• Suitable for food, beverage, pharmaceutical and cosmetic, or biotechnology industries

Automatic Temperature Compensator Supplied on all cells
Cell Constant 4973/4974: 0.01, 0.1, 1.0, and 10 cm-1
Maximum Temperature Limit 4973: 140°C (284°F) at rated pressure
4974: 130°C (266°F) at rated pressure, may be further limited by CIP gasket and clamp type
Maximum Pressure Limit 4973: 1724 kPa (250 psig) at rated temperature
4974: 1034 kPa (150 psig) at rated temperature, may be further limited by gasket and clamp type
Insertion 4973 cells: 3/4” NPT male thread for schedule 40 and 80 pipe
4974 cells: 1 1/2” or 2” sanitary CIP fitting
Insertion Depth 89 mm (3 1/2”) for 1, 10, and 0.01 constants from solution end of 3/4” NPT male thread
64 mm (2 1/2”) for 0.1 constant
Wetted Parts Cell body: PES (polyethersulfone)
Electrodes: 0.01 and 0.1 constant, titanium; 1.0 and 10.0 constant, high-density graphite with Teflon guard. 4974 series also includes food grade silicone rubber and polished 316 S.S.
Lead wire 4973/4974: Integral PVC-covered, shielded, 22-gage cable. If more than 50’ is required, specify the junction box head and the required length of extension cable (head has 3/4” female NPT with 1/2” female adapter bushing) conduit connection). For a separate junction box, specify part number 31316260, and appropriate length of cable
Electrical Connections

4973: Integral cable – 6 leads with integral Automatic Temperature Compensator 
      Quick disconnect option – mating head with cable must be purchased from Honeywell.

4974: Integral cable – 6 leads with integral Automatic Temperature Compensator

Weight 4973: 0.2 kg (0.5 lb.)
4974: 0.4 kg (1 lb.)
Approvals 4973: Manufactured to comply with ASME boiler and pressure vessel code Section VIII, Div. 1, UG-101. CRN #0F11607-5C

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