Category Products

  • SKU: MH1174A
  • Ships within 10 business days

McDonnell & Miller model number RB-24E is an electronic low water cut-off control probe for hot water boilers. This probe is 24 volt with an automatic reset and a maximum pressure of 50 psi. It features a LED indicator light which show if there is power to the control unit or the presence of water in the boiler. It is a compact unit with 3/4" MIP connections and a 3/4"probe.

Online Price: $115.41
Regular Price: $148.00

  • SKU: MH1174B
  • Ships within 10 business days

McDonnell & Miller model number RB-24ES is an electronic low water cut-off control probe for hot water boilers. This probe is 24 volt with an automatic reset and a maximum pressure of 50 psi. It features a LED indicator light which show if there is power to the control unit or the presence of water in the boiler. It is a compact unit with 3/4" MIP connections and a 3/4"probe.

Online Price: $120.86
Regular Price: $155.00

  • SKU: MH1174T
  • Obsolete

McDonnell & Miller model number RBT-3000 is a remote electronic low water cut-off control probe for hot water boilers. This probe is 24 volt with a maximum pressure of 160 psi. It features a LCD display on the control box. It is a compact unit with 3/4" MIP connections and a 1-3/8"probe.

This item is obsolete. It is shown for reference purposes only. Please call (877) 775-7705 for repair parts and replacements.

  • SKU: MI1176
  • 2 in stock
  • Ships within 10 business days

McDonnell & Miller model number EA-157-L is a long electrode conductance probe for model number 157-RBP and 157S-RBP controls.

Online Price: $171.54
Regular Price: $220.00

  • SKU: MI1176A
  • 1 in stock
  • Ships within 10 business days

McDonnell & Miller model number EA-157-S is a short electrode conductance probe for model number 157-RBP and 157S-RBP controls.

Online Price: $171.54
Regular Price: $220.00

  • SKU: MI1176B
  • 1 in stock
  • Ships within 10 business days

McDonnell & Miller model number EA-RS is an electrode conductance probe for model number RS-1-BR-1 and RS2-BR-1 remote sensors.

Online Price: $120.86
Regular Price: $155.00

  • SKU: MI1499
  • Ships within 10 business days

McDonnell & Miller model number PA-RB-122 is a probe for model number RB-120 low water cut-offs.

Online Price: $72.52
Regular Price: $93.00

  • SKU: HY1020
  • 3 in stock
  • Ships within 1 business day

Hydrolevel standard 3/4" NPT probe measuring 2-7/8" long.

Online Price: $58.67
Regular Price: $66.00

  • SKU: HY1021
  • 4 in stock
  • Ships within 1 business day

Hydrolevel 3/4" NPT probe with a longer nut (1-11/16") for thicker boiler jackets.

Online Price: $73.66
Regular Price: $82.87

  • SKU: HY1023
  • 1 in stock
  • Ships within 1 business day

Hydrolevel 3/4" NPT probe with short inside dimension that is designed for installation in standard reducing tee and short clearance installations.

Online Price: $58.67
Regular Price: $66.00