Thermohygrometer

At the Pyramid Laboratory Observatory AWS the DMA570 Lsi-Lastem Thermohygrometer is mounted on a 2 m pole.

It is a probe for measuring air temperature and air relative humidity with replaceable sensitive element for simplify calibration and maintenance. LSI-Lastem supplies a precise and reliable set of probes, suitable for a continuous measurement in severe environments, in presence of deep thermal and hygrometric ranges with high sun radiant heat. An important feature of this set of sensor is that the thermohygrometric sensitive element is easily replaceable, in order to have a simple and rapid ordinary maintenance and avoiding calibration. The Thermohygrometer has supported a considerable improvement, owing to a deep technical and styling development process: a fan ensures a continuos air change around the sensor in order to eliminate temperature fault caused by radiant heat.

For temperature:

Range -30.+70°C

Sensitive element Pt100 1/3 DIN-B

Accuracy ± 0,1°C (0°C)

Hysteresis&Repeatability na

Resolution 0,025°C

Long term stability -0.04% (after 5 years at 200°C)

Calibration uncertainty 0,1°C

Response time (T63) Wind speed 0,3-0,5 m/s: 80sec

Radiation shield efficiency with respect to forced ventilation sensor (wind 0,5m/s, rad.800 W/m2): +0,6°C

For relative humidity:

Range: Nom.0..100%, Eff.10..98%

Sensitive element Capacitive

Accuracy 2,5% (11-90%) 0,6°C (20°C, 50%RH)

Hysteresis&Repeatability 0,5%

Resolution 0,2%

Long term stability -2%/year (at 75%RH) n.a.

Calibration uncertainty 0,1°C 1,5% na

Response time (T63) Wind speed 0,3-0,5 m/s: 80sec

Radiation shield efficiency with respect to forced ventilation sensor (wind 0,5m/s, rad.800 W/m2): n.a.

General characteristic:

Ventilation: Natural

Electric output Jumper locally selectable 2 x 0-20 mA, 4-20 mA, 0-5 V, 1-5 V. 60-300 mV

Output signals Output n.1: temperature. Output n.2: RH% or dew point (default RH%)

Operating temperature -30°+70°C

Sampling rate 1 sec. (default) PC programmable 1..300 sec.

N°acquisitions for mobile average calculation: N°1 (default), PC programmable 1..20 acquisitions

Load resistance (mA output): DMA570 300 Ohm

 
Citation proposal
(2011) . Thermohygrometer. https://geoportal.mountaingenius.org/geonetwork/srv/api/records/21bd401d-3db5-42d0-86dc-dfe19239000f
 

Simple

Date ( Publication )
2011-04-12T19:08:00
Edition
Name
Pyramid Laboratory Observatory (Lobuche, Khumbu Valley, Himalaya - Nepal)
Purpose

The purpose of this resource is to acquire data on:

- air temperature

- relative humidity

Status
On going

  Point of contact

  +39 035 3230551 
Website
http://www.evk2cnr.org/  
Maintenance and update frequency
As needed
Keywords ( Theme )
  • NEXTDATA
Keywords ( Theme )
  • NEXTDATA
Keywords ( Theme )
Keywords ( Theme )
Keywords ( Theme )
  • SHARE , monitoring network , station , air temperature, relative humidity
Keywords ( Place )
  • Nepal , Lobuche , Khumbu Valley , Sagarmatha National Park
Keywords ( Theme )
  • NEXTDATA
Keywords ( Theme )
Keywords ( Theme )
Keywords ( Theme )
  • SHARE , monitoring network , station , air temperature, relative humidity
Keywords ( Place )
  • Nepal , Lobuche , Khumbu Valley , Sagarmatha National Park
Keywords ( Theme )
  • NEXTDATA
Keywords ( Theme )
Keywords ( Theme )
Keywords ( Theme )
  • SHARE , monitoring network , station , air temperature, relative humidity
Keywords ( Place )
  • Nepal , Lobuche , Khumbu Valley , Sagarmatha National Park
Keywords ( Theme )
  • NEXTDATA
Keywords ( Theme )
Keywords ( Theme )
Keywords ( Theme )
  • SHARE , monitoring network , station , air temperature, relative humidity
Keywords ( Place )
  • Nepal , Lobuche , Khumbu Valley , Sagarmatha National Park
Use limitation
Data Sharing and Publication Policy at DISTRIBUTION SECTION
Access constraints
Intellectual property rights
Other constraints
Spatial representation type
Vector
Character set
UTF8
Topic category
  • Climatology, meteorology, atmosphere
  • Geoscientific information
  • Environment
N
S
E
W


Reference system identifier
EPSG / WGS 84 (EPSG:4326) / 7.4
Topology level
Geometry only
Geometric object type
Point
Geometric object count
1
OnLine resource
SHARE Geonetwork  

SHARE Geonetwork

OnLine resource
gn:share_station  

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OnLine resource
SHARE_DSPP_10042014.pdf  

SHARE Data Sharing and Publication Policy

OnLine resource
Data_Request_Form.pdf  

SHARE Meteorological Data Request Form

Hierarchy level
Series
Other
Data: air temperature, dew point, relative humidity, specific humidity
Statement
The sensors are mounted on a 2m mast.

gmd:MD_Metadata

File identifier
21bd401d-3db5-42d0-86dc-dfe19239000f   XML
Metadata language
eng
Character set
UTF8
Parent identifier
8f278c1b-1eb8-47be-9a0a-a7429c23dd9c
Hierarchy level
Series
Hierarchy level name
Date stamp
2019-12-04T19:16:48
Metadata standard name
ISO 19115:2003/19139
Metadata standard version
1.0

  Point of contact

  +39 035 3230551 
Website
http://www.evk2cnr.org  
Dataset URI
 
 

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