• Adjustable Bx outlet for easy installation
• Dual precision switches for dependable operation of cut-off, alarm or electric water feeder
• Packless bellows
• Millivolt circuits

McDonnell & Miller B106-4

• Quick hook-up fittings provided
• Lever-operated, full port ball valve for easy blow down
• Adjustable Bx outlet for easy installation
• Dual precision switches for dependable operation of cut-off, alarm or electric water feeder

B103-1

61

• Combustion pressure switch check feature and communication interface capability
• Heavy duty electro-mechanical design for long life
• Automatically re-energizes circuit upon return to safe water level
• Equipped with shorter probe for mounting in standard reducing tees
• SPDT switch contact
• Includes shorter EL1214-SV probe suitable for mounting in standard black tee

B103-30

• Interrupts power immediately in a low water condition
• Provides contacts for optional low-water alarm, heavy-duty construction
• Automatically restarts burner on return of normal water level
• NEMA 1 enclosure

170

• Burner circuit contacts open after 15 sec delay in a low water condition
• Delay prevents short cycling caused by momentary fluctuations in the boiler water level
• Automatically reactivates burner circuit 30 sec after water reaches the probe, allowing optional water feeder to raise water level above the probe
• SPDT switch contact

B103-38

• Electronic operation, easy to install and wire
• Red low water indicating LED, green power indicating LED
• Automatic reset and now with test butTon
• 20000 ohm probe sensitivity
• NEMA 1 enclosure

RB-122

• Provides accurate and dependable protection
• External LEDs and simplified wiring for easy
• Probe-style, microprocessor-based control that detects the fluid level in hot water and steam boilers and reacts when the level falls below the minimum safe operating level
• SPDT switch contact

LFM1203S-1

• Automatically shuts off burner in a low water condition to prevent boiler damage
• Heavy duty construction and 16 amp relay suitable for virtually any commercial water boiler needs
• Burner circuit test butTon and interrupts power immediately in a low water condition
• LED indicator lights
• SPDT switch contact
• Includes EL1214-P probe with longer nut for boilers with thicker jackets

550P

• Patented adjustable probe sensitivity
• External LEDs and simplified wiring for easy installation and testing
• Includes external test butTon, adjustable delay on break (DOB) and delay or make
• SPDT switch contact

LTA1203S-2

• Provides step-by-step, diagrammed instructions for fast, easy installation and wiring
• Burner circuit locks-out if water remains below probe for 30 sec
• Burner circuit test butTon allows for testing the control without lowering the water level and indicator lights for easy troubleshooting
• SPDT switch contact

B112-3

• Compact design and burner circuit test butTon
• Power and low water LED indicators
• Automatically restarts burner on return of water level
• Interrupts power immediately in a low water condition and features test butTon, onboard indicating lights and easy to follow installation instructions
• Includes plug-in wire harness with labelled quick connect terminals
• SPDT switch contact

1150MINI