Category Products

  • SKU: MH1174A
  • 4 in stock
  • 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: $110.50
Regular Price: $119.70

  • 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: $115.10
Regular Price: $124.69

  • 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This item is obsolete.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
  • 6 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: $164.97
Regular Price: $186.49

  • SKU: MI1176A
  • 12 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: $164.97
Regular Price: $186.49

  • SKU: MI1176B
  • 8 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: $114.33
Regular Price: $129.24

  • SKU: MI1495
  • 4 in stock
  • Ships within 10 business days

McDonnell & Miller model number S-4 is a probe spacer used when two or more probes longer than 36" are used on RS sensors.

Online Price: $42.20
Regular Price: $47.71

  • SKU: MI1496
  • 16 in stock
  • Ships within 10 business days

McDonnell & Miller model number PA800 is a probe for the following probe type low water cut-offs: PS-851-120, PS-851-M-120, PS-852-24, PS-852-M-24, PS-801-120, PS-801-M-120, PS-802-24, PS802-M-24, and RS-1-LP.

Online Price: $72.90
Regular Price: $82.40

  • SKU: MI1497
  • 5 in stock
  • Ships within 10 business days

McDonnell & Miller model number PA800-U is a probe for the following probe type low water cut-offs: PS801-U-120 and PS-802-U-24.

Online Price: $168.82
Regular Price: $190.84

  • SKU: MI1498
  • 3 in stock
  • Ships within 10 business days

McDonnell & Miller model number PA800-RX2 is a probe for the following probe type low water cut-offs: PS801-RX2-24 and PS-802-RX2-24.

Online Price: $105.13
Regular Price: $118.84

  • SKU: MI1499
  • 1 in stock
  • 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: $69.07
Regular Price: $78.07

  • SKU: MI1500
  • 2 in stock
  • Ships within 10 business days

McDonnell & Miller model number P-1-SS is a stainless steel probe for RS series sensors, used in conjunction with model number PCH, PCL, and LPC-2000 series liquid level controls.

Online Price: $14.97
Regular Price: $16.93

  • SKU: MI1504
  • 1 in stock
  • Ships within 10 business days

McDonnell & Miller model number P-1/3-SS is a 4-1/2" stainless steel probe for RS series sensors, used in conjunction with model number PCH, PCL, and LPC-2000 series liquid level controls.

Online Price: $9.22
Regular Price: $10.42

  • SKU: MI1505
  • 26 in stock
  • Ships within 10 business days

McDonnell & Miller model number P-2-SS is a 24" stainless steel, Teflon-coated probe for RS series sensors, used in conjunction with model number PCH, PCL, and LPC-2000 series liquid level controls.

Online Price: $34.91
Regular Price: $39.47

  • SKU: MI1510
  • 3 in stock
  • Ships within 10 business days

McDonnell & Miller model number P-3-SS is a 36" stainless steel, Teflon-coated probe for RS series sensors, used in conjunction with model number PCH, PCL, and LPC-2000 series liquid level controls.

Online Price: $41.44
Regular Price: $46.84

  • SKU: MI1515
  • 2 in stock
  • Ships within 10 business days

McDonnell & Miller model number P-4-SS is a 48" stainless steel, Teflon-coated probe for RS series sensors, used in conjunction with model number PCH, PCL, and LPC-2000 series liquid level controls.

Online Price: $52.94
Regular Price: $59.85

  • SKU: MI1520
  • 5 in stock
  • Ships within 10 business days

McDonnell & Miller model number P-5-SS is a 60" stainless steel, Teflon-coated probe for RS series sensors, used in conjunction with model number PCH, PCL, and LPC-2000 series liquid level controls.

Online Price: $69.84
Regular Price: $78.94

  • SKU: MI1521
  • Ships within 10 business days

McDonnell & Miller model number P-6-SS is a 72" stainless steel, Teflon-coated probe for RS series sensors, used in conjunction with model number PCH, PCL, and LPC-2000 series liquid level controls.

Online Price: $81.34
Regular Price: $91.95

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