Namche Thermohygrometer
At the Namche 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
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Citation proposal
(2011) . Namche Thermohygrometer. https://geoportal.mountaingenius.org/geonetwork/srv/api/records/5f448357-08b6-4d45-b57a-4fc36f721d02 |
Simple
- Date ( Publication )
- 2011-05-20T03:00:00
- Purpose
-
Meteo-climatic observations in this area are very important for the study of the environmental changes that are affecting this ecosystem, helping the scientific community to improve the prediction of the evolution of this environmental phenomena and modification.
This station is reference point within the CEOP-High Elevation (CEOP-HE) initiative, promoted in order to investigate possible changes of hydrological and energy cycles in high elevation regions and to better elucidate the role of mountains within the climate system from a local to global scales.
The purpose of this resource in Namche station is to acquire data on:
- air temperature
- relative humidity
- Status
- Completed
Point of contact
- Maintenance and update frequency
- As needed
- GEMET ( Theme )
-
- thermal power plant
- Keywords
-
- SHARE , Monitoring Network , Station , High Altitude
- Keywords
-
- CEOP
- Keywords ( Place )
-
- Namche , Khumbu Valley , Sagarmatha National Park , Nepal
- Keywords ( Theme )
-
- air temperature
- Use limitation
- No conditions apply
- Access constraints
- Copyright
- Other constraints
- Metadata language
- eng
- Character set
- UTF8
- Topic category
-
- Climatology, meteorology, atmosphere
- Environment
- Geoscientific information
))
- Supplemental Information
- Reference system identifier
- EPSG / WGS 84 (EPSG:4326) / 7.4
- Topology level
- Geometry only
- Geometric object type
- Point
- Geometric object count
- 1
- OnLine resource
-
Himalayas Reference Site Namche Station
Himalayas Reference Site Namche Station
- Hierarchy level
- Series
- Other
- Instruments: AWS sensors
- Statement
-
The station was installed on October 2001. The sensors are mounted on a 2m masts
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
gmd:MD_Metadata
- File identifier
- 5f448357-08b6-4d45-b57a-4fc36f721d02 XML
- Metadata language
- eng
- Character set
- UTF8
- Parent identifier
- 2e8cbdb5-bf79-40f2-86bc-d26050336ff5
- Hierarchy level
- Series
- Date stamp
- 2025-02-24T08:52:44
- Metadata standard name
- ISO 19115:2003/19139
- Metadata standard version
- 1.0
Point of contact
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