Monitor | KAX Rotary Paddle Switch
- Monitor's KAX line of rotary paddle bin level indicators consist of the most reliable, rugged and economical point level control sensors available for detection of dry bulk materials. These easy to install sensors are proven performers in a wide variety of bulk materials. Monitor's paddle switches can be used to eliminate bin overflow, maintain a predetermined material level, indicate plugging of conveyors and pneumatic lines or provide any of a number of level control functions. Unlike many other available paddle units for bins and silos, Monitor's paddle level indicators incorporate a feature that automatically shuts off the motor of the unit when the paddle is in a stalled position, which both extends the life of the motor and minimizes maintenance.
- Features:
- Twist On/Off Cover
- Motor Shuts Off When Paddle Is Impeded
- Significantly Extends Motor Life
- Reduces Maintenance Costs
- Wiring Access - 2 Conduit Entrances
- Competitive Price Makes The Monitor Bin Level Indicator Your Best Value
- Three Bearing Design With Sealed Bearings Last Longer
- Built-In Slip Clutch Extends Life
- Hazardous Location Approvals Available - IECex DIP A21
- Unique Low Voltage DC Design Available
- Standard KAX Units Rated to 149°C
- Hi-Temp Models Rated to 399°C
Principle of Operation
The operation of Monitor's rotary paddle bin level switch is quite simple. The unit is installed through the wall of the vessel, so that the paddle protrudes inside the vessel. A small electric motor drives a paddle which rotates freely in the absence of material.
When the paddle is impeded by material, the motor rotates within the housing which triggers two switches. The first switch is a “dry” electrical contact closure that is available to control a process function or alarm circuit. The second switch cuts the power to the motor, preventing a locked rotor condition, thus extending motor life. This also activates the signaling device which is wired through that same motor switch. When the material level drops, the loaded stretched tension spring returns the motor to its original running position and the unit is reactivated.
No Product Pdf.
| Specification | Power Requirements: 115 VAC (+/- 10%), 50/60 Hz; 230 VAC (+/- 10%), 50/60 Hz; 24 VAC (+/- 10%), 48 VAC (+/- 10%), 50/60 Hz; 12/24 VDC (10.2-27.6 VDC) Power Consumption: 4W max. Operating Temperature: -40°F (-40°C) to +200°F (+93°C) ext. amb.; to +300°F (+149°C) internal bin temperature. High Temp Unit to +750°F (+399°C) internal bin temperature Conduit Connection: Two (2) 3/4" NPT; M20 cable glands (Model KA units with 1-1/2” BSPT process connection only;Not on KAX units) Outputs Contacts: 2-Circuit Configuration Two SPDT 15A @ 250 VAC ea. max 3-Circuit Configuration One SPDT 15A @ 250 VAC max One DPDT 10A @ 250 VAC max Maximum Pressure: 30 PSI (2 bar) maximum Sensitivity: 5 lb/ft³ (80 kg/m³) minimum material density (when using large 3-vane paddle) Housing: Die cast aluminum, NEMA 4 / ENCLOSURE TYPE 4, IP66 Housing Finish: Powder coating Mounting Connection: 1-1/4" NPT or R 1-1/2 (BSPT 1-1/2) Shipping Weight: Approx. 7 lbs (3.2 kg) Materials of construction/accessories: Flexible Couplings: 304 stainless steel Mounting Plates: Carbon steel or 304 stainless steel All Paddles except Ex-Flex: 304 stainless steel Ex-Flex Belt: 304 stainless steel coupling, rubber/fabric blend belt Flexible Cable Extension: 304 stainless steel Solid Shaft Extension/Guards: Galvanized or 304 stainless steel Shaft Seal: Nitrile Listings/Approvals: KA: UL and CSA: Ordinary Locations KAX: UL and CSA: Class I, Div. 1 & 2, Groups C, D; Class II, Div. 1 & 2, Groups E, F, G ATEX: (Ex) II 1/2 D c T 100°C ExtD A20/A21 T 100°C (Ta -40°C to +93°C) IP6x IEC Ex: DIP A21 IP6X TA 100°C -40°C to +93°C All Models: CE Mark |
| Configuration | MOTOR VOLTAGES Monitor offers several motor voltages to serve most power requirements. Available AC motors include 115 VAC, 230 VAC, 24 VAC and 48 VAC. Superior 12/24 VDC design available uses low voltage AC motor for longer life in all applications. View DC Powered Technical Sheet (PDF). Model KA, 115 VAC, p/n 1-8301-1 Model KA, 12/24 VDC, p/n 1-8331-1 OUTPUT CIRCUITS Monitor paddle units are available with 1, 2 or 3 output contacts. The cost effective 1-circuit model utilizes the motor switch (SPDT) as the output contact, as long as the alarm device operates on the same voltage as the motor. The most popular 2-circuit design contains the motor SPDT switch and a second SPDT isolated switch for control outputs (See wiring diagram for illustration). The 3-circuit configuration provides the user with the SPDT motor switch and an isolated DPDT switch for control outputs. PROCESS CONNECTIONS Monitor offers a choice of either a 1-1/4” NPT or 1-1/2” BSPT process connection. Model KA units with the 1-1/2” BSPT connection also include M20 cable glands. APPROVALS/LABELING Monitor paddle units are available approved to UL, CSA and ATEX/IECex requirements. Various models are approved for either general purpose, dust/ignition-proof and/or explosion-proof applications. In addition, all models carry the CE mark. See “Specifications” section for more details. HIGH TEMPERATURE UNITS Monitor’s high temperature models incorporate all the standard features of the KA or KAX models, but can be used in applications where temperatures reach as high as 750°F (399°C). The hi-temp models incorporate a specially designed mounting plate, pipe extension with air purge connection, shaft extension, couplings and bushings. The high-temp assembly is available in either a carbon steel or stainless steel version. See “Ordering Information” for applicable part numbers. |
Customer Reviews
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