NR Lite2 Radiomètre Net

• Modèle ne nécessitant pratiquement pas d’entretien 

• Adapté aux conditions d’utilisation extérieures 

• Facile à utiliser  Add this product to basket Request information
Share this page

NR Lite2 Radiomètre Net

Le NR Lite2 est conçu pour effectuer des mesures périodiques du rayonnement net qui représente le bilan entre le rayonnement entrant et sortant, dans des conditions extérieures.

La conception du NR Lite2 est unique. Le détecteur est installé sur un absorbeur conique noir, doté d’un revêtement PTFE et résistant aux intempéries. Contrairement à d’autres modèles de sondes, le NR Lite2 ne nécessite pas de dômes fragiles, en plastique. Ce modèle ne requiert donc pratiquement aucun entretien. La tige verticale empêche les oiseaux d’influencer le signal de sortie. 

Le NR Lite2 est facile à utiliser. Il se base sur une sonde thermopile. La tension est proportionnelle au rayonnement net. Il peut être directement raccordé à un voltmètre ou à un enregistreur de données avec une entrée mV.

Le NR Lite2 est parfaitement adapté à des conditions d’utilisation extérieures et satisfait pleinement à la réglementation CE.

Back to productcategory

Specifications

Gamme spectrale 200 to 100.000 nm
Sensibilité 10 µV/W/m²
Temps de réponse < 20 s
Gamme de températures de service -30 °C to +70 °C

FAQ

  • Does the CNR 2 use the same sensor as the NR Lite(2) without wind-breaking domes? Or does it have separate thermopiles for short and long wave radiation?

    • Both instruments use thermopiles, but the dome over the thermopile determines what kind of radiation passes through and reaches the thermopile. A  thermopile  is normally protected by a single or double dome to reduce offsets caused by sudden temperature changes like wind.

      The CNR 2 uses two glass domes to cover the pyranometer and two silicon domes to cover the pyrgeometers. It uses TWO thermopile detectors (1 for each of the two pyranometers and 1 for each of the two pyrgeometers) and provides two separate outputs. One NETTO for short wave (solar spectrum) and one NETTO for long wave radiation.(Far Infrared spectrum).

      So yes, the CNR 2 has separate thermopiles to measure Far Infrared and Solar radiation and so do the other CNR net radiometers.

      The detector from the NR Lite(2) is not protected and I sin direct contact with the weather conditions. Therefore it cools down a lot faster by the wind, which effects the accuracy of the measurements. The NR Lite(2) uses NO dome. It uses only TWO detectors with a PTFE coating and provides ONE single output for NETTO short wave- and long wave radiation.  It uses one thermopile to measure the full spectrum of Far Infrared and solar radiation.

      Is your question still unanswered? Contact Support
  • How come the NR Lite(2) specs refer to a continuous range between 200 and 100,000 nm, while the CNR 2 specs refer separately for the short and long wave radiation ranges?

    • The difference between the NR Lite(2) and CNR 2 lies in the material used to cover the thermopiles.

      CNR 2 uses glass domes for the pyranometers (that measure short wave radiation) that have a bandwidth of 300 nm to 2800 nm. It uses silicon domes for the pyrgeometers (that measure long wave radiation) that have a bandwidth of 4500 nm to 42000 nm. This leaves a gap between 2800 nm and 4500 nm. This is the so called atmospheric window where very little radiation comes in (see picture below).

       

      The NR Lite(2) uses NO domes. It uses two detectors with a PTFE coating which have a bandwidth of 200 nm to 100.000 nm.

      Is your question still unanswered? Contact Support
  • For the NR Lite, we want to use wind correction, but we don't understand the manual

    • The correction factor in the manual could indeed be written more carefully. It says dividing by (1+x.V3/4) this refers to the calibration factor. Better is to say the output should be multiplied with a factor (1+x.V3/4).

      Is your question still unanswered? Contact Support
  • What color code is used when there is an extended cable on the NR LITE?

    • Sometimes it happens that the colors of the cables are different when you order extended cables. Usually there is added a page in the manual where this is mentioned.

      Standard = extended
      White = white
      Green = blue
      Black = black

      Is your question still unanswered? Contact Support

Accessories

Accessory Description
© 2025 OTT HydroMet B.V.