Senseca

LPNET07 Net Irradiance Meter for Accurate Outdoor Energy Balance Monitoring

LPNET07 net irradiance meter for outdoor energy balance and meteorological monitoring.

Net irradiance measuring range ±2000 W/m²
Spectral range 0.2…100 µm with 180° viewing angle for both sensors
Passive thermopile sensor with PTFE-coated receiving surfaces
Operating temperature -40…+80 °C
Fixed 5 m cable, factory calibrated with calibration report

Quantity

Overview

The Senseca LPNET07 is a net irradiance meter designed for outdoor energy balance monitoring and meteorological applications. It measures the difference between radiation received by its upper and lower surfaces using a thermopile sensor based on the Seebeck effect. The instrument provides a measuring range of ±2000 W/m², a spectral range of 0.2…100 µm and a 180° viewing angle for each of the upper and lower sensors.

The radiometer features PTFE-coated receiving surfaces for long-term outdoor use in all weather conditions and operates at temperatures from -40 to +80 °C. As a passive instrument, it requires no external power supply and delivers a low-level voltage output through a fixed 5 m cable for connection to a voltmeter or data logger. Each unit is factory calibrated and supplied with a calibration report.

Typical Applications

Net irradiance monitoring in meteorological applications
Outdoor surface energy balance studies
Indoor radiant temperature measurement according to ISO 7726

Key Features

Thermopile sensor based on the Seebeck effect
Dual PTFE-coated receiving surfaces for outdoor radiation measurement
Net irradiance measuring range ±2000 W/m²
Spectral range 0.2…100 µm
180° viewing angle for each sensor
Typical sensitivity 10 µV/(W/m²)
Response time (95%) less than 60 seconds
Operating temperature −40…+80 °C
Passive operation without external power supply
Low-level voltage output with typical sensor impedance of 2…4 Ω
Fixed 5 m UV-resistant connection cable
Factory calibrated and supplied with calibration report

Benefits

Net radiation balance measured with one instrument
Broad spectral coverage for solar and terrestrial radiation monitoring
Suitable for long-term outdoor monitoring with PTFE-coated receiving surfaces
No external power supply required for operation
Easy connection to a voltmeter or data logger through a fixed 5 m cable
Factory calibrated and supplied with a calibration report

Specifications

Measurement
Measured quantity	Net irradiance
Measuring principle	Thermopile sensor based on the Seebeck effect
Measuring range	±2000 W/m²
Spectral range	0.2…100 µm
Typical sensitivity	10 µV/(W/m²)
Response time (95%)	<60 s
Upper sensor viewing angle	180°
Lower sensor viewing angle	180°

Electrical
Power supply	Not required (passive sensor)
Output signal	Voltage signal, typically a few mV
Typical sensor impedance	2…4 Ω
Recommended reading instrument	Voltmeter or data logger
Recommended reading resolution	1 µV
Connection cable	Fixed 5 m UV-resistant cable
Cable configuration	2 wires plus shield
Positive output (+Vout)	Red wire
Negative output (−Vout)	Blue wire
Cable shield / radiometer housing	Black wire

Environmental
Operating temperature	−40…+80 °C
Outdoor suitability	Suitable for outdoor use in all weather conditions

Mechanical
Housing material	Anodized aluminium alloy
Fixing shaft material	Anodized aluminium alloy
Sensitive area material	Aluminium alloy with PTFE coating
Bird spike material	Stainless steel
Fixing shaft dimensions	Ø16 × 500 mm
Weight	Approximately 0.35 kg

Calibration
Factory calibration	Factory calibrated
Calibration method	Comparison with a reference net radiometer using a solar simulator with a parallel light beam
Calibration documentation	Calibration report supplied
Calibration checking	Annual checking highly recommended

Installation
Minimum installation height	1.5 m above ground
Orientation – Northern Hemisphere	Toward the south
Orientation – Southern Hemisphere	Toward the north
Installation location	Free from shadows cast by buildings, trees and other obstructions
Grounding	Local grounding of the metallic housing preferred

Drawing

Downloads

LPNET07 Datasheet	DownloadLPNET07 Datasheet
LPNET07 User Manual	DownloadLPNET07 User Manual
LPNET07 CE Declaration of Conformity	DownloadLPNET07 CE Declaration of Conformity