Overview
The Monitor KA bin level indicator is a rugged, electro-mechanical point-level sensor designed for dry bulk solids monitoring in industrial applications. Monitor Technologies KA / KAX rotary paddle level indicators are dependable switches for most powder and bulk solids materials including grain, feed, food processing, cement, aggregates, coal, plastic pellets, pharmaceuticals, wood chips and more. The standard KA model operates at 115VAC with two independent SPDT switch circuits, making it ideal for alarm and dual-control configurations.
Key Features
- Rotary paddle design — continuous rotation until material contact triggers mechanical stop and switch activation
- Cast aluminum housing — twist-on-twist-off cover and rugged cast aluminum construction
- Serviceable components — all parts separate and replaceable for field maintenance
- Motor shut-off feature — reduces wear when paddle is blocked by material
- UL/CSA/CE certified — meets safety and regulatory standards for hazardous and standard installations
- Simple electro-mechanical operation — no electronics to fail, proven reliability in harsh environments
Technical Specifications
- Manufacturer: Monitor Technologies
- Model: KA
- Part Number: 1-8301-1
- Operating Voltage: 115VAC
- Motor Rating: 15A at 115V, 1-phase
- Switch Configuration: 2-circuit SPDT (Single Pole Double Throw)
- Process Connection: 1-1/4″ NPT
- Housing Material: Cast aluminum
- Certifications: UL, CSA, CE
- Sealed Bearing: Yes (prolongs unit life)
Typical Applications
Monitor paddle units can be installed almost anywhere dry bulk materials are stored, including bins, hoppers, silos, and tanks. Common uses include:
- Cement and fly ash silos in ready-mix concrete plants
- Grain and feed storage in agricultural operations
- Plastic pellet hoppers in injection molding and extrusion
- Coal bunkers and material handling systems
- Food processing and pharmaceutical powder bins
- Shavings hoppers and wood processing applications
Compatibility & Replacements
Compatible With
- Standard industrial control circuits with 115VAC single-phase power
- Alarm and shutdown relay logic systems
- Dual control applications (two independent SPDT circuits)
- Tanks and vessels with 1-1/4″ NPT threaded ports
- Extension pipes and flexible couplings for paddle mounting
Replaces / Drop-In Replacement For
The Monitor KA 1-8301-1 directly replaces older Monitor KA units with identical 115VAC, 2-SPDT, 1-1/4″ NPT specifications. Verify configuration details with your equipment documentation before ordering to ensure port connection and switch circuit requirements match.
Works With
- Monitor paddle accessories: Standard 3-vane stainless steel paddle (1-4146), banana paddle (1-4193), top mount plate (1-0102)
- Flex couplings and extension pipe for remote paddle mounting
- Timer modules and relay logic circuits for timed operation
- Alarm systems and emergency shutdowns requiring SPDT contacts
