Renseignements généraux

Nº de série

1060

Nº de partie

1

Nombre total de parties

1

Ou

Snow depth sensor

Brevets

S/O

Description générale

metal casing and parts/ synthetic parts

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

33,3 cm

Largeur

18,3 cm

Hauteur

19,5 cm

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Météorologie

Catégorie

Mesure de montant, taux et durée de précipitation

Sous-catégorie

S/O

Fabricant

Ou

Campbell

Pays

Canada

État/province

Alberta

Ville

Edmonton

Contexte

Pays

Canada

État/province

Inconnu

Période

late 1980's; this instrument was apparently in use for 15 years (Ref. 6)

Canada

A snow measuring instrument of a type designed and used by the Meteorological Service of Canada to gather snow depth data in Canada. Part of a large collection of meteorological instruments acquired from the Meteorological Service of Canada (previously Atmospheric Environment Service) by the CSTM since 1967. MSC is the government agency responsible for collecting and disseminating meteorological data and forecasts in Canada. It was founded in 1871 in Toronto where it is still headquartered. The MSC was originally on the University of Toronto downtown campus but moved to Downsview in 1971 on land owned by UofT. The headquarters houses laboratories, research facilities and calibration and instrument maintenance facilities (now largely contracted out).

Fonction

An instrument used to measure the depth of fallen snow by using a sonic wave to measure the distance between the instrument and the snow surface.

Technique

A Campbell Scientific snow depth sensor. This CSMAL sonically measures the distance to a snow surface then corrects for temperature in order to compute the depth of snow from the beginning of the season. It was originally designed by AES and later built and sold by Campbell Scientific (CS). In 1990 CS replaced it with the less expensive UDG01 which did not include the temperature sensor (Ref. 1). According to the AES and CS manuals (Refs. 2-3), the primary components of the depth sensor are a Polaroid ultrasonic transducer and a Texas Instrument ranging module. Together they ‘ranged' a target by bouncing an ultrasonic wave, or series of pulses, off the surface and listening for the return echo. The instrument also contained a National Semiconductor solid sate temperature sensor temperature sensor to measure the ambient temperature because the speed of sound in air varies with the air temperature. In operation, the sensor would be mounted on a horizontal cross arm of a meteorological tower.

Notes sur la région

Inconnu

Détails

Marques

black lettering on grey label on top reads 'CSMAL [logo?]/ CAMPBELL SCIENTIFIC/ MANUFACTURING ALBERTA LTD./ SERIAL #1060'/ black lettering on white label on top reads '0001-0436/ [bar code] AES/ *5122-00082* 5122/ SONIC SNOW DEPTH SENSORS'/ black lettering on white label on top reads 'CS [logo]/ CAMPBELL SCIENTIFIC/ (C)/ EXTENDED/ TEMP'

Manque

appears complete

Fini

brushed grey metal casing/ metallic temperature sensor with white synthetic mount/ white painted metal temperature sensor housing with black painted interior/ grey and black cable/ white synthetic and plated metal ranging unit

Décoration

S/O