CWB-3000-W - American Sensors Corp.
CONTINUOUS AND RELIABLE MEASUREMENT
EVEN IN DUST, STEAM, VAPORS, NOISE, and HIGH TEMPERATURES
- High Penetration - penetrates accumulated ash buildup due to increased operating range, which is approximately 300% greater than that of the conventional model.
- Unaffected by Adverse Environments
- Simple Beam Alignment
- Selectable Detection Mode:
- Small Sensing Head -- Approx. 100m range with 027mm antenna
- Microwave barrier
- Hot metal edge detection
- Hot strip detection
The CWB-3000 microwave sensor is a level switch, which consists of a transmitter and a receiver, installed face to face. The transmitter transmits microwaves toward the receiver and an output relay in the receiver is released when the beam is obstructed. Harsh environments may result in a buildup of contaminants on the sensing surfaces. However, the sensor easily penetrates this buildup, due to the high penetrability of microwaves.
PRINCIPLE of OPERATION:
When microwaves transmitted through air encounter an object, some will be reflected, some absorbed and the rest will pass through the object. The amount of microwaves passing through the object depends on its composition.
Generally speaking, microwaves cannot penetrate metals and are reflected; water absorbs the most microwaves. Microwaves can easily pass through plastics, glass, ceramic, paper etc. Therefore:
- It may be difficult to detect loosely piled paper, Styrofoam and dried cement.
- All substances other than metals can be penetrated when attached to the sensing surface. Penetrability depends on the thickness and composition of the attached material, the quantity of metallic substances and the amount of water contained in said material.
- The unit may be protected from high temperatures, hazardous materials, vibration and shock by providing detecting windows, on both sides of the tank, through which the microwaves can pass, and by installing the unit away from such surroundings.
These windows should be made of ceramic, Teflon or polypropylene materials having no water content, through which there is minimum loss of microwaves.
- The detecting windows should be at least 60 mm in diameter as microwaves pass more easily through larger apertures.
The distance between the window and the unit should be less than 200 mm, however, for larger windows this distance may be greater.
* The operating distance may vary from sensor to sensor and according to installation.
CWB-3000-WT Transmitter with Antenna and