Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.
If our community has helped you, please consider making a contribution to support this website. Thanks!

Additional Low Water Cutoff

Options
2»

Comments

  • Mad Dog_2
    Mad Dog_2 Member Posts: 8,563

    Ken Resnick and Lance for Rathe Sales showcased that new Hydrolevel LWCO at a recent Continuing Ed Training...can't wait to try it. Mad Dog

    Consulting by Mad Dog & Matt Jr.
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 20,228

    Must be some type of light sensor.

  • 109A_5
    109A_5 Member Posts: 4,068
    edited December 2025
    https://forum.heatinghelp.com/discussion/comment/1879878#Comment_1879878

    Why ? With this kit, its looks like just a chamber like a mini M&M #67 without the float (piped the same way as the 67) and it's just a probe type LWCO. First item below "Cast Iron Hub Assembly" Has nothing to do with the sight glass except it is a convenient place to put it like the 67.

    image.png image.png
    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • ethicalpaul
    ethicalpaul Member Posts: 8,850

    I think @EBEBRATT-Ed was referring to this one which does seem to use an optic sensor on the gauge glass itself

    image.png

    NJ Steam Homeowner.
    See my sight glass boiler videos: https://bit.ly/3sZW1el

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 20,228

    yes to the optic sensor.

    As far as hydrolevel goes they have had the parts available to mount a probe type on a gauge glass for years. It just took some searching in their catalog to find it.

  • 109A_5
    109A_5 Member Posts: 4,068

    As far as the picture I posted above from another older thread of the sensor attached directly to the sight glass;

    Proximity Switch
    Omron E2K-C25MY2
    Capacitive Proximity Switch
    200mA Max

    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System

Categories