Belfort Model 6450 Visibility Meter

The Belfort Model6450 VisWx visibility/weather phenomenon sensor is designed to monitor visibility conditions within a range of 6 meters to 80 kilometers, and can report weather conditions according to the International Meteorological Organization (WMO) code based on automatic weather information requirements. The VisWx visibility/weather phenomenon sensor includes digital outputs and relay outputs. The RS232 digital output in the range of 300~38400 baud is used to display real-time visibility and provide diagnostic information, while also providing an operational path for parameter setting and calibration of the instrument. The VisWx visibility/weather phenomenon sensor uses 15 WMO codes to report weather phenomena such as rain, snow, sleet, hail, heavy fog, light fog, haze, etc.

Belfort has designed and developed this new sensor by summarizing its successful experience in visibility technology applications, ensuring that the instrument can maintain high accuracy even if it exceeds the limited range of visibility and weather conditions. Sensors have been designed with full consideration for ensuring accuracy and stability while controlling costs, and can be widely applied in fields such as automatic weather stations, highways, airports, lighthouses, ports, ships, and other offshore platforms.

The VisWx visibility/weather phenomenon sensor operates using the widely recognized forward scattering principle. A high output infrared LED emitter projects light into the sample air, and the forward scattered light is received by the receiver. The light source is adjusted to suppress background noise and natural variations in the emission effect under background light intensity. Sensors can output visibility and weather phenomenon data at user set time intervals through the RS232 port (supporting asynchronous output frequencies for visibility and weather phenomenon data), or input commands to obtain data information in registration mode. The critical value of visibility can be set to any value within the operating range of the instrument.

The sensor is installed in a lightweight protective housing and can be mounted on a simple support rod. The structure is sturdy and stable, made entirely of corrosion-resistant materials. The standard configuration includes a lens heater installed on the lens to prevent condensation of water vapor. The optional protective cover heater is very effective for sensors working in cold weather. The transmitter and receiver protective covers are designed to eliminate the impact of precipitation on instrument operation. The calibration kit is used for on-site calibration of sensors, which can be calibrated under various weather conditions.

Product Features:

• High precision
• Recognized optical technology
• Digital and relay outputs
The action point of the relay is adjustable
• Compact structure and light weight
• Easy to install and maintain
• Corrosion resistance

Optional items:
• 校正包 P/N 92001