Weather Station / Anemometer · Navigation & Bridge Equipment
The Gill Instruments WindObserver 75 is an ultrasonic anemometer for strong winds, with a measuring range of 0 to 75 m/s (168 mph). Wind speed accuracy is better than 2 % RMSE at 12 m/s, with a resolution of 0.01 m/s. Direction covers 0 to 360 degrees without a dead band and is accurate to better than 2 degrees RMSE at 12 m/s. Output is 1 to 4 Hz over RS422 or RS485 with Modbus RTU, at baud rates from 1200 to 38400.
The head carries 150 W of electrical heating to keep it free of ice in most freezing conditions, drawing 7 A at 24 VAC or DC. The anemometer electronics alone need 9 to 30 VDC. The body is stainless steel 316 with IP66 (NEMA4X) protection and is rated for -55 to +70 degrees C with heating. It weighs 1.7 kg with a 2 m cable or 1.3 kg with the connector. No site calibration is required, and a zero-wind integrity check unit is an optional extra. The sheet lists EMC to EN61326-1: 2013 and EN60945:2002.
The product code begins 1390-75. Cable exit is an integral connector or a cable gland with 2 m, 10 m or 15 m of cable. Mounting is offered as none, short base, long base or pipe mount, with fixing screws and washers included. The base mount drawings show four tapped M5 holes. The warranty is 24 months. The separate Mk2 datasheet adds a Lloyd's Register type approval entry that the base model sheet does not show.
Sources: Gill Instruments datasheet WindObserver 75, checked 05.10.2026
Do you have the manufacturer datasheet for this model? Send it with the enquiry form — we check it and name the source.
Photos, drawings and page previews from this model’s datasheet or catalog.
The WindObserver 75 is a robust ultrasonic wind sensor designed for challenging environments.
What our service work and the manufacturer documentation say about keeping this model running.
Inspect sensors, antennas, transducers, cameras, cabling, power supplies and network interfaces applicable to the installed equipment. Compare displayed information with independent references where possible and investigate recurring alarms or missing channels. Verify required outputs to other bridge systems and preserve configuration before approved software or hardware maintenance. Clean exposed sensors and optical surfaces without damaging coatings or seals. Check backup power or recording arrangements where applicable. Refer to the manufacturer documentation for the exact figure for test, calibration, update and recovery procedures.
Keep fuses, selected power-supply and interface modules, cables or connectors, storage media where applicable and manufacturer-recommended sensor or electronic spares. Replacement core units must remain compatible with the approved bridge installation. Preserve configuration and recorded setup data.
Free of charge — send us your request for Gill Instruments equipment. Our team checks it and replies by e-mail.
Other models of the same equipment type, Gill Instruments first.
Tell us what you need for this Gill Instruments WindObserver 75 — a part, a service call, a second opinion. Are you Gill Instruments? Claim this brand page.
Service engineer? Write the day report for this WindObserver 75 in OceanSphere Work — photos, hours and parts, as a PDF for the owner. Try it free for 14 days →
Yes. Specifications, documents and service notes for this model are readable without an account. An account adds saved searches and requests, nothing is taken away.
Yes. Tell us the manufacturer, the model and what you need — a person reads every request and replies by e-mail.
Send us the nameplate or the correct value. We check it against the manufacturer datasheet or class-society record and update the page.