Smartsaa Instruments (I) Private Limited

SMARTsaa is leading manufacturer and exporter of Rotating Paddle Level Switch used for level measurement of powder, granules and food grains

Used in almost any dry bulk material application in hoppers, silo, bins & tanks. Durable rugged design, that is compatible with many bulk solids, pelletized and granule applications. For level sensing of saw dust, flour, peanuts, grains, wood, pellets, fine coal, clay, silica sand, Portland cement, foundry sand and many more.

OPERATING PRINCIPLE:

Paddle type switches consist of motor, which drives a paddle through a planetary gearbox arrangement. The absence of material allows motor to turn the paddle uninterrupted. When the unit senses the presence of material via the restricted rotation of the paddle, the reversing torque actuates the internal micro-switches and alarms the unit, to give corresponding output signal. Special clutch mechanism switches off power supply to the motor when paddle is locked in the material, preventing motor burning due to overheating in locked condition.

FEATURES:

Specially designed motor for long life

Low cost, simple reliable switch for level control.

Specially designed motor, which does not burn under lock rotor condition, motor shuts off when paddle is impeded.

For High- Low level alarms

Specially designed PTFE seal to prevent ingress of dust particles into main enclosure

Varieties of paddle designed for variety of materials

Field replaceable paddle assembly to suit various applications

Mounting from sides or top of silo / bin

Low friction, double shielded bearing assembly for use in dusty area

Heavy duty motor ensures long life

High temperature models for use up to 200 degree cent

De-energizes the motor in locked condition- Reduces wear and heating and extends motor life

SPECIFICATIONS:

Mounting Screwed: 1 inch BSP (M)

Flanged:   Various flange size available, please specify

Supply :  240 V AC, 50 Hz / 110 V AC / 24 V DC (Pleases specify)

Power consumption: 4 VA

Output: 1 C/O Relay contact rated for 5 Amp resistive at 230 V AC

Indication: Red LED to indicate power On –OFF / Output status

Enclosure: Cast Al, Field mounting type, IP 65

Conduit Connection: PG 9

Rotary speed of paddle: 1 RPM, synchronous motor with state of the art clutch and gear arrangement

Paddle shaft Diameter   : 12 mm  

Sensing Torque: 3 Kg-cm approx 

Operating Temp (Process temp) : Standard models up to 80 degree cent, High process Temp models : 200 degree cent with suitable shaft extension ( The control unit max temp 80 degree cent )        

Bulk Density: Min 500 gm to 1 Kg. Please specify bulk density to offer suitable paddle.

Paddle Type:  Various paddle designs available for different materials and applications

Shaft extension: As per requirement

 

SMARTsaa offers various types of Hopper Level Switches. 

We supply all variety of level switches for detecting Powder and solids Level in hopper. Various options are available like RF Admittance Type, Paddle Level Switches, Vibrating Fork Level Switches, Diaphragm – Membrane Level Switch , Boot Level Switch, Chute Jam Detector Switch, Ultrasonic and Radar Level Switches and transmitters.

Coal Ash Sensors CAS does not require the use of an artificial radiation source. They make full use of the naturally occurring trace amounts of radioactive nuclide in  the  environment.  Mounted  in  a  fixed  position, the  ash  sensor  is  able  to measure changes in the strength of the gamma rays present as the quantity of ash material fluctuates.

Using patented random signal recognition technology, Coal Ash Sensors can effectively identify changes in the naturally-occurring gamma ray signals inside hoppers. CAS sensors have a dedicated signal handler that can distinguish gamma ray signature given off by the ash material from naturally-occuring gamma ray present as background noise in the environment. This provides an extremely accurate reading of the level location of the ash material present.

APPLICATION AREA:

Ash Level Sensing of ESP Hopper in Thermal Power plants

1.Fly Ash High-Level/Low-Level

Electrostatic precipitators (ESPs) or filter bags are used to remove particulate matter from stack gases exhausted from burning coal. This ash is collected in hoppers under the ESP or filter.  The ash must be removed before it causes the ESP to short out or damage to the filter bags.

The CAS is mounted at a point below the ESP or filter bag to indicate when the ash needs to be removed.

CAS is often used to indicate a low-ash condition when emptying.

CAS is very suitable for this abrasive and hot environment in which temperatures can reach 1,500 degrees Fahrenheit.

2. Continuous Level Sensing In Fly-Ash Silos

• Small antenna size, easy to install; Non-contact radar, no wear and tear, no physical contact with material
• Almost no effect of corrosion, bubble, water vapors. It is also not effected due to change in the temperature and pressure of the medium.
• No effect of dust. Works well in highly dusty environment.
• Due to short wavelength, the reflection of solid surface inclination is better.
• As beam angle is small, the energy is concentrated, can enhance the ability of echo and to avoid interference.
• High signal-to-noise ratio, the level measurement in fluctuating state can obtain better performance.
• Product can also be used in hazardous area
• Radar level transmitter find applications in level monitoring of liquids and powder, granules and solid material. It is suitable for highly dusty environments such as cement industry and is less affected by environment effects like dust, wind and rain.

• No calibration required, simple to install.
• Performance independent of material characteristics i.e. change in conductivity, di-electric constant.
• No moving parts, hence no wares and tears.
• Weatherproof enclosure, SS 316 for food industry.
• Field selectable operation logic: configurable high or low point switching.