Onset S-WSET-B Data sheet

Wind Speed Smart Sensor (S-WSB-M003) Manual

W

The wind speed smart sensor is designed to work with HOBO® stations. The smart sensor has a
plug-in modular connector that allows it to be added easily to a HOBO station. All sensor
parameters are stored inside the smart sensor, which automatically communicates
configuration information to the logger without the need for any programming or extensive
user setup.

Specifications

Measurement Range 0 to 76 m/sec (0 to 170 mph)

Accuracy ±1.1 m/sec (2.4 mph) or ±4% of reading, whichever is greater

Resolution 0.5 m/sec (1.1 mph)

Service Life >5 year life typical, factory replaceable mechanism

Distance Constant 3 m (9.8 ft)

Wind Speed Smart Sensor

S-WSB-M003

Item included:

• Mounting rod

Accessories:

• Full cross arm (M-CAA)

• Half cross arm (M-CAB)

Starting Threshold ≤1 m/sec (2.2 mph)

Maximum Wind Speed Survival 76 m/sec (170 mph)

Measurements Wind speed: Average wind speed over logging interval

Gust: Highest 3-second gust during the logging interval

See Measurement Operation for more information

Operating Temperature Range -40° to 75°C (-40° to 167°F)

Environmental Rating Sensor and Cable Jacket: Weatherproof

Housing

Dimensions 41 x 16 cm (16 x 6.5 in.) including 1.27 cm (0.5 in) diameter mounting

eight 300 g (10 oz)

Bits per Sample 8 for each channel, 16 total

Number of Data Channels* 2

Measurement Averaging No

Cable Length Available 3.5 m (11.5 ft)

Length of Smart Sensor
Network Cable*

* A single HOBO station can accommodate 15 data channels and up to 100 m (328 ft) of smart sensor cable (the digital

communications portion of the sensor cables).

Three cup polycarbonate anemometer: Modified Teflon
hardened beryllium shaft with ice shedding design

rod; 5.5 cm (2.1 in.) drip overhang

0.5 m (1.6 ft)

The CE Marking identifies this product as complying with all relevant
directives in the European Union (EU).

®

bearings and

18787-B MAN-S-WSB

Wind Speed Smart Sensor (S-WSB-M003) Manual

Mounting

Placement and Mounting Considerations

• The wind speed smart sensor should be mounted

vertically in a location free of wind shadows.

• For accurate wind speed measurements, mount the

sensor at a distance of at least five times the height of the
nearest tree, building, or other obstruction.

• Be sure to secure the sensor cable with cable ties to

protect the cable from damage.

• To provide long-term protection from moisture entry, the

smart sensor adapter must be mounted horizontally and
with the cable wires routed with drip loops so that water
drains away from the cable entry point as shown in the
example below. When mounted properly, the housing is
weatherproof (but not waterproof).

Smart
sensor
adapter
mounted
horizontally

a. Loosen the tri-clamp bolts and raise or lower the entire

mast so that the wind sensor is close to the desired
height. Make sure there is at least 5 cm (2 inches) of
mast extending below the lower tri-clamp.

b. Make sure the upper mast dimple is still facing north (if

in northern hemisphere) and then re-tighten the tri­clamps. Once the tri-clamp bolts are tight, tighten the
lock nuts to lock the bolts in place. This requires two
wrenches: one to hold the bolt and one to tighten the
lock nut against the tri-clamp.

c. Loosen the bolt holding the wind sensor mounting rod

and raise or lower it as necessary so the center of the
wind sensor anemometer cups is at the desired height.
Re-tighten the bolt.

6. Use cable ties to secure the sensor cables to the cross arm,

bracket, and mast. The sensor cables should run below the
cross arm and brackets to minimize the chance of birds
pecking and damaging the cables. Cable ties should be
spaced no more than .3 m (1 foot) apart. Make sure there
are drip loops on both sides of the smart sensor housing,
which must also be mounted horizontally, as described
under Placement and Mounting Considerations.

Drip
loop

Drip loop

• The tripod or mounting mast must be properly grounded.

For field installations, you can use Onset’s grounding kit
(M-GKA).

• Secure the mast the wind sensor is mounted on so that it

does not vibrate. If you are using Onset masts or tripods,
secure them with guy wires.

• Although the wind sensor is designed to operate in 100+

mph winds, it can be damaged with improper handling.
Store the sensor in its shipping box until you are ready to
install it.

• Refer to the Tripod Setup Guide for more information.

Mounting the Sensor to a Tripod Cross Arm

1. Insert a 1/4-20 x 1-3/4 inch hex head bolt with a flat washer

on it through the 1/4 inch hole on the end of the cross arm.
Tighten with a 7/16 inch wrench until snug.

2. Install another flat washer and nylock nut on the bolt,

allowing the black mounting rod to protrude 1/2 inch (1.3
cm) from the bottom of the cross arm.

3. Insert the sensor mounting rod into the cross arm. Secure

the ground wire to the lug nut on the cross arm.

4. Tighten the nut and bolt until the rod is clamped in place.

5. Adjust the height of the sensor in the cross arm as

necessary using one of the following methods and then
tighten the nut and bolt until the cross arm just starts to
deform.

Mounting rod

Cable ties

Sensor cable

Upper
mast

Mounting the Sensor to a Pole

1. Loosely secure the sensor mounting pole with two hose

clamps (not included) as shown below. Adjust the height of
the sensor as necessary, but make sure the hose clamps are
separated by at least 4 inches (10 cm).

2. Secure the sensor cable with cable ties. See diagram on next

page. Make sure there are drip loops on both sides of the
smart sensor housing, which must also be mounted
horizontally, as described under Placement and Mounting
Considerations.

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