Standard Sensors

Wind Speed and Direction, Air Temperature, Relative Humidity/Dew Point, and Pressure/Altimeter setting. The unit is expandable to accept other weather sensors for measuring, visibility, cloud height (ceilometer), freezing rain, present weather, lightning, RVR, surface ice/chemical detection, and many other parameters. Please contact us for a complete listing.


AC (120/240 Volts), 50/60 Hz power supply


The Sensor Display Unit is a 10.4" diagonal VGA color TFT flat panel display module, with active display area of 6.2" x 8.3". This display was chosen for its clarity, wide viewing angle and sunlight readability.


Standard 10 meter or custom available.

Photo of Sensor Display Unit

FAA Certified Stand Alone Weather Station

The Stand Alone Weather Station is a flexible and easy to maintain aviation weather station. It can be used as ASOS backup, which measures the critical parameters of: wind speed and direction, gust, altimeter setting, dew point, air temperature, and relative humidity.

Coastal Environmental Systems' SAWS is the FAA's newest weather station. The data acquisition electronics controlling the Stand Alone Weather Station is the ZENO® 3200 datalogger. Built around a full 32-bit microcontroller, it is the world's most powerful data acquisition system.

The three part system begins with the obtainment of data in the Stand Alone Weather Station Sensors Unit (SU). The data is then transmitted via hardwire or radio to a Control Display Unit (CDU) where it is directed to various flat panel, daylight readable Sensor Display Units (SDU).

All Coastal Environmental Systems weather stations are designed from the ground up with minimal maintenance as a key feature. Every Line Replaceable Unit can be unplugged and removed with no soldering or power tools necessary. Self-diagnostics are designed to minimize false alarms based on normal operation of the SAWS unit, and to make allowances for weather parameters that are not a daily occurrence.

The ZENO® 3200 in the Stand Alone Weather Station Sensors Unit (SU) is the same one used by Lockheed/NASA/Air Force for all 65 weather towers at Patrick and Vandenberg Air Force Bases (NASA’s Western and Eastern Range). SAWS is currently being deployed by the FAA at all class "C" airports in the U.S.

Photo of Sensor Unit

Sensor Unit

Major elements of the SU consist of a Coastal Environmental Systems ZENO® 3200 datalogger, UHF radio with antenna and variable power attenuator (optional hardwire link), and a heater strip: all encased in a NEMA-4X enclosure. Weather sensors include: heated ultrasonic wind sensor, barometric pressure sensor, motor aspirated solar radiation shield, capacitance-type humidity sensor, and a thermistor bead (temperature). If the Sensor Unit loses power, or resets due to a power surge, it will automatically return to normal operation without human intervention.

Photo of Control Display Unit

Control Display Unit

The CDU carries out range and static checks on the new, instantaneous wind measurements and updates the wind vector running average. A selector switch on the CDU allows the user to select which running average, for winds, is desired. The Control Display Unit will mark the running averages as bad if more than one-quarter of the readings are bad or missing. The CDU also determines current gusts, monitors the number of communications received from the SU, and identifies whether or not sensor measurements have remained static. The CDU will also provide an error message to the user whenever an incorrect checksum is received.

Photo of Panel Mount Sensor Display Unit

Panel Mount Sensor Display Unit

The SDU is a 10.4" diagonal VGA color TFT flat panel display module, with active display area of 6.2" x 8.3". The display is updated once per three seconds with the latest information from the Sensor Unit. Communication and sensor status information is shown in a strip along the bottom of the screen, separated from the primary sensor display. An analog display shows instantaneous wind speed and direction readings.

Please contact us for complete information on Coastal's weather stations. Visit our AWOS and ASOS pages to learn about our other aviation weather stations and the weather sensors used.