Series PS-850 – Low Water Cut-Offs

McDonnell & Miller : Low Water Cut-Offs :

As of August 24, 2012 the Series PS-850 controls will no longer be available. For replacement, we recommend purchasing Series 751P/752P or Series RB controls. The following links will direct you to a product X-Ref chart and product information pages for the Series 751P/752P and Series RB controls.

Product X-Ref chart

Series 751P/752P

Series RB-24E

Series RB-122E

Contact your local Representative if you have any questions.

Features and Benefits

  • For residential, commercial and industrial applications
  • Electronic operation
  • New Features:
  • User-friendly diagnostics
  • – Red low water and shorted probe LED
  • – Green power and test LED
  • Higher probe sensitivity: 7,000 ohms
  • No lock out with loss of power if probe is in water
  • No blow down of control required when mounted
  • directly into boiler tappings
  • Test button standard on all models
  • Options available include:
  • – Manual reset
  • – Extended barrel, remote and short probe models
  • – 120 volt and 24 volt models (24 volt models meet
  • ANSI specification Z21.13a)
  • Power consumption 1.7 VA
  • Provisions to add alarm
  • Maximum ambient temperature 120°F (49°C)
  • Maximum water pressure 160 psi (11.2 kg/cm2)

Catalog Pages

    Regional Office:

    Byblos Bank Center 1st Floor
    Baabda Main Street
    Tel.: +961-5-920401