Renseignements généraux

Nº de série

93K72542/ 20048

Nº de partie

1

Nombre total de parties

3

Ou

S/O

Brevets

S/O

Description générale

metal sensor & wire/ synthetic wire covering

Dimensions

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

Longueur

92,0 cm

Largeur

S/O

Hauteur

S/O

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Météorologie

Catégorie

Mesure de température de l'atmosphère

Sous-catégorie

S/O

Fabricant

Ou

YSI

Pays

United States of America

État/province

Ohio

Ville

Yellow Springs

Contexte

Pays

Canada

État/province

Inconnu

Période

This instrument was apparently in use for twelve years (Ref. 6)

Canada

A temperature sensor of the type used by the Meteorological Service of Canada to gather temperarture and/or dewpoint data across Canada, probably typical of the installations at MAPS1 and IWD automatic station installations from about 1980 to the present (2004) [See Supp. Info. 2004.0318]. 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

The temperature sensing element of a remote temperature and/or dewpoint indicating system which provides ambient & dewpoint temperature measurements.

Technique

An example of a temperature sensing element used in a temperature reading unit or a remote temperature /dewpoint measuring system. The most commonly used temperature sensor in Canada is called a thermistor which is a mixture of metal oxide semiconductors prepared from finely powdered metal oxides. The resistance of these semiconductors changes exponentially with temperature and has a negative temperature coefficient. Over a 100°C range the thermistor resistance changes three orders of magnitude. The first Canadian use of thermistors for weather observations was on an automatic buoy in Lake Ontario during WWII. At automated stations in Canada an array of three thermistors and two precision resistors are potted in a metal probe to produce, with an external balancing resistor, a temperature sensor with a linear response. This is called a thermolinear array. The YSI 44212 thermistor array was selected in about 1980 for network use due to its high resistance (13.7 kW) which almost eliminates the effect of lead resistance in field installations. Also the output which was a linear with temperature did not require special circuits or computations to derive the temperature from the sensor resistance. YSI 44212 Thermolinear Array (Yellow Springs Incorporated) Range -50 to +50°C

Notes sur la région

Inconnu

Détails

Marques

Incised lettering reading '93K72542', '20048' and '62'

Manque

hardware to attach sensor to tower mount (.2)

Fini

plated sensor, white wire covering

Décoration

S/O