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Vela 420 Weather Station

Vela 420 Weather Station

The Vela 420 Weather Station offers a complete weather station with 4-20 mA output for industrial PLC interface.


  • 4-20 mA current output for all parameters
  • Multi-Sensor Design -- easy installation with a single sensor cable
  • One-year Warranty
Weatherproof Enclosure

Combining the ease of an all-in-one sensor package with the reliability and affordability of mechanical wind sensors, the Vela 420 Weather Station provides:

  • proven, reliable wind speed and direction sensor technology,
  • temperature and humidity sensors in a radiation shield,
  • solid state barometric pressure sensor, and
  • optional tipping bucket rain gauge

The 4-20 mA signal output interfaces to PLC, DCS, and SCADA systems.

(Modbus/OPC communication is available with the Weather MicroServer monitoring any CWS weather station.)

Additionally, real time monitoring, data logging, and graphing are available with a stand-alone Weather Display Console and/or Weather Master Software. The Weather MicroServer can also be connected to offer Internet-ready data as well as additional industrial protocols.

Vela 420 Weather Station Includes

  • Vela All-in-One Sensor Transmitter (with 50-foot cable and mounting adapter) including:
    • Radiation shield with temperature, relative humidity, barometric pressure
    • Mechanical wind speed and direction sensors
    • Optional tipping-bucket rainfall
  • Weatherproof enclosure
    • Two 4-20 mA converter modules
    • Power supply
    • AC surge protector
  • Recommended: Surge Protector (Arrestor)

Call for a quote toll free 1-866-625-8620 or email.

The Vela 420 Weather Station incorporates the following sensors in an cost-effective all-in-one sensor head. Click to expand for specific sensor and measurement details.

The Vela features a durable aluminum/stainless steel wind direction and speed sensor using a three-cup anemometer for accuracy, sensitivity, and durability and a lightweight vain tail for low starting threshold.

Wind Speed Range: 0 - 50 m/sec
Wind Speed Resolution: 0.1 m/sec
Wind Speed Accuracy: ± 2%
Wind Speed Threshold: 1 m/sec
Wind Direction Range: 0 - 360°
Wind Direction Resolution:
Wind Direction Accuracy: ± 5°
Wind Direction Threshold: 1 m/sec
Vela Wind Sensors

Barometric Pressure: A solid state pressure sensor built into the sensor electronics provides accurate measurement of barometric pressure changes over a wide range. Electronic temperature compensation is included for highest accuracy over the operating temperature of the sensor.

Accuracy: ± 2 mbar

Range: 500-1100 mbars

Resolution: 0.1 mbar

Both temperature and humidity are built into the temperature shield at the bottom of the sensor package. The integral shield limits errors due to solar radiation. The RH sensor is a capacitive element enclosed in a protective membrane.

Temperature Range: -40 to +60°C (-40 to +140°F)
Temperature Resolution: 0.01°C
Temperature Accuracy: ± 0.5°C
Humidity Range: 0 to 100%
Reporting Resolution: 1% RH
Humidity Accuracy: ± 4%
Vela Weather Station Shield

The tipping bucket electric rain gauge is composed of a complex spun collector funnel with a knife edge that diverts the water to a tipping bucket mechanism. For each tip, a magnet causes an electronic pulse that is recorded. The rainfall sensor is completely automatic - spent water drains out of the bottom of the housing, hence, the instrument requires no servicing.

Accuracy: ±1% at 2 in./hr or less

Resolution: 0.01 inch

Heated rain gauge is available.

Tipping Bucket Rain Gauge

Wind Speed
Resolution: 0.1 m/sec
Range: 0 to 50 m/sec
Threshold: 1 m/sec

Accuracy: ± 0.5°C
Resolution: 0.01°C/F
Range: -40 to +60°C (-40 to +140°F)

Relative Humidity
Accuracy: ± 4%
Reporting Resolution: 1% RH
Range: 0 to 100%

Wind Direction
Resolution: 1 degree
Range: 0 to 360 degrees
Accuracy: ± 5 degrees
Threshold: 1 m/sec

Barometric Pressure
Accuracy: ± 2 mbar
Range: 500 - 1100 mbars
Resolution: 0.1 mbar

Accuracy: ±1% at 2 in./hr. or less
Resolution: 0.01 inch

Optional sensors of Solar Radiation, Photosynthetically Active Radiation, Visibility, and up to two additional Temperatures can be connected via the Weather MicroServer.

With the Vela 420 Weather Station, monitoring is accomplished on the user's PLC device.

Additionally, dedicated weather monitoring is available with these proprietary options:

FTP output (XML and CSV) • XML web service • Internet browser user interface

SNMP, Modbus/OPC and RTU communication protocols are standard for Industrial Management applications.

Compatible with CWOP (Citizen Weather Observer Program) and Weather Underground, the MicroServer can automatically post data from your weather station to these network websites.

Open Weather MicroServer Page

Weather MicroServer

Industrial grade WVGA touchscreen displays current weather data, trends, min/max.

Computes and displays wind chill, heat index and other calculated parameters.

Seven-inch color LCD panel with 800 x 480 pixel resolution.

Available in desktop/wall-mount chassis, 19" rack mount, or panel mount.

Open Weather Display Page

Color Weather Display

Weather Master™ is our proprietary software optimized for CWS weather stations. It provides computer weather monitoring, calculated parameters, graphing and trend displays, as well as automatic archiving of weather data, alarm notification, interface with CAMEO/ALOHA, and weather web page updates.

Additional software options are available including third-party software for PC and Mac.

Open Weather Software Page

Weather Software

Included with the Vela 420 Weather Station is a 50-foot section of sensor cable which connects to the Weatherproof Enclosure.Customer supplied 4-20 mA Signal Cables connect the Weatherproof Enclosure (screw terminal blocks) to the PLC device.Additional monitoring options require their respective RS-232 Cable.

Vela 420 Weather Monitoring System Diagram

Due to the wide variety of installations, masts and mounting hardware are sold separately. The following items are available from Columbia Weather Systems. (Click to expand for specific details.)

For mounting wind sensor assembly; includes two five-foot sections.
Catalog Number: 88005

(May be used with Roof or Wall Mount Kit below.)

Includes universal mast mount, guy wire clamp, guy wire, lag screws, and eye bolt screws.
Catalog Number: 88002

(Does not include mast - User supplied or select steel mast above)

Open Hardware Kit PDF including diagrams

Roof-Mount Hardware Kit

Roof Mount Hardware Kit
(Catalog Number 88002)

Includes 4" wall mounts with lag screws.
Catalog Number: 88003

(Does not include mast - User supplied or select steel mast above)

Open Hardware Kit PDF including diagrams

Wall-Mount Hardware Kit

Wall Mount Hardware Kit
(Catalog Number 88003)

This tripod mast is designed to provide 8 to 10 feet of stable, secure support for your weather station sensors or other instrumentation. Set up takes less than five minutes.

Competitively priced and sturdy, the tripod is constructed from welded aluminum and anodized for appearance and longevity. The 15-pound tripod can support up to 60 pounds of equipment such as weather sensors on a 1" (outside diameter) vertical pipe stub.

Operational Features

  • Sturdy construction supports up to 60 pounds of equipment.
  • Legs insert easily into body and fasten securely with stainless steel retainer pins.
  • Guy wires clip quickly to feet for increased stability.
  • Includes tiedown kit for optional optimized stability.

Tripod Specifications

Capacity: Supports up to 60 lbs.
Diameter: 1" OD
Shipping Weight: 17lbs
Shipping Box Dimensions: 70" x 8" x 8"

Order Information

Tripod with Tiedown Kit, Catalog Number: 88019
Tripod Tote for storage and transportation, Catalog Number: 88009

Open Tripod Data Bulletin PDF

Weather Station Tripod Mast
Tripod Leg Joint
Tripod TieDown Kit

The following accessories are available for Vela 420 Weather Stations. Surge protection with the Lightning Arrestor is highly recommended. Click a title to expand text for additional information.

Three-stage surge protector, for data and power signals.

A nearby lightning strike may induce a high voltage surge which the internal suppressor of your weather instrument may not be able to withstand, causing significant damage to the weather station. Protect your weather station investment with a Lightning Arrestor.

This compact transient overvoltage suppressor is designed for weather stations in areas with an elevated risk of lightning strike.

  • Superior 3-stage surge protection
  • Tolerates up to 10kA surge currents
  • Both differential and common mode protection on each channel
  • Filtering against HF and RF noise
  • Two power channels and two data channels
  • Environmental protection class IP66

Catalog Number: 8355

Includes adjustable mounting clamp.

Download Lightning Arrestor PDF

Lightning Arrestor

Plugs directly into the Ethernet Port on the Weather MicroServer.

Catalog Number: 8356

Plugs directly into Serial Port on a computer or Weather MicroServer.

Catalog Number: 8353

The new battery back-up option provides continuous power to the weather station system in the event of an electrical outage. The 12VDC battery comes in a NEMA enclosure and can power a non-heated Orion LX Weather Station for up to three days. It is available for most weather station configurations.

Catalog Number: 8395-1
Enclosure Size: 12" x 10" x 6"
Enclosure: 16 gauge galvanized steel with polyester power finish
Industry Standards: NEMA/EEMAC Type 3R
Battery: 28 AHr Sealed Lead Acid Rechargeable
Power Input: 88 - 264VAC
Power Output: 12VDC

Battery Backup

Vela 420 Brochure

Open Vela 420 Brochure PDF