GENERAL DESCRIPTION

The Model 750 is an economical general purpose rigid probe for use with Robertshaw capacitance instruments. It is used for level measuring applications involving liquids or dry materials. Available either bare (non-insulated) or Teflon insulated for use in conductive solutions. The Teflon electrode insulation has a Teflon wall thickness of 1/16" over a 7/32" 316 stainless steel sensing rod. The Teflon insulated probe is recommended for use on low viscosity liquids and low to medium density granular materials. (For abrasive or agitated products, see Robertshaw Model 728B Heavy Duty probes.)

 The Model 750 Probe has been designed to ensure long, trouble-free life. Extra tight fitting Teflon insulation has been incorporated into the design of the Model 750 Probe series. This insulation is continuous through the total length of the probe, including the gland. If a seal should break down and allow leakage into the gland, this internal construction is such that the measurement will not be affected and reliable readings will continue.

 The Model 750 Probe, except as noted, conforms to the requirements of the National Association Of Corrosion Engineers (NACE) specification MR0175-88 (Material requirements For Resistance To Sulfide Stress Cracking For Oilfield Equipment).

APPLICATION DATA

 When a probe is used with on-off (point level) instruments, it may be installed in the vessel either horizontally or vertically. For extremely small differential (deadband), the probe should be mounted in a horizontal position at the desired level point.

 If the probe is to be used on a continuous level measurement application, the probe must be mounted in the vessel in a vertical position. For low dielectric liquid applications, the Model 750 probe offers a concentric shield option over the sensing electrode.