LPNET14 4-Component Net Irradiance Meter thumbnail 1

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Senseca

LPNET14 4-Component Net Irradiance Meter

Four-component net irradiance meter for solar and infrared radiation monitoring.

Measures global and reflected solar irradiance, plus infrared radiation from the sky and ground
Overall spectral coverage of 0.3…45 µm with built-in NTC sensor for pyrgeometer temperature compensation
Passive operation without external power supply, IP65 protection and -40…+80 °C operating temperature

Quantity

Overview

The Senseca LPNET14 is a four-component net irradiance meter equipped with two pyranometers for measuring global and reflected solar irradiance and two pyrgeometers for measuring infrared radiation from the sky and ground. It covers an overall spectral range of 0.3…45 µm and incorporates an NTC temperature sensor for pyrgeometer temperature compensation.

Designed for outdoor monitoring, the instrument features an anodized aluminium housing, optical glass pyranometer domes and silicon pyrgeometer windows with scratch-resistant DLC coating. It provides IP65 protection and operates from -40…+80 °C. The passive design requires no external power supply and features two 8-pole M12 connectors for connection to a voltmeter or data logger. Each instrument is factory calibrated and supplied with a calibration report.

Typical Applications

Four-component net radiation monitoring
Global and reflected solar irradiance measurement
Sky and ground infrared radiation measurement
Meteorological and environmental monitoring stations
Radiation data acquisition using voltmeters or data loggers

Key Features

Four-component measurement of global and reflected solar irradiance, plus sky and ground infrared radiation using two pyranometers and two pyrgeometers
Overall spectral coverage of 0.3…45 µm
Spectrally Flat Class C pyranometers according to ISO 9060:2018
Pyranometer measuring range of 0…2000 W/m²
Pyrgeometer measuring range of -300…+300 W/m²
Built-in NTC temperature sensor for pyrgeometer temperature compensation
Optical glass pyranometer domes and DLC-coated silicon pyrgeometer windows
Anodized aluminium housing with IP65 protection
Operating temperature range of -40…+80 °C
Passive operation without external power supply
Two 8-pole M12 connectors for sensor signal connections
Integrated bubble level for horizontal installation alignment
Factory calibrated and supplied with calibration report

Benefits

Four-component solar and infrared radiation measurement supports comprehensive net radiation monitoring
Built-in NTC temperature sensing supports pyrgeometer temperature compensation
Factory calibrated and supplied with a calibration report for reference
Passive operation eliminates the need for an external power supply
IP65 protection and durable materials support outdoor monitoring in varying weather conditions
Integrated bubble level simplifies horizontal installation alignment
Two 8-pole M12 connectors allow connection to voltmeters or data loggers
Replaceable silica-gel cartridges help reduce internal condensation

Specifications

General
Model	LPNET14
Instrument type	4-component net irradiance meter
Sensor configuration	2 pyranometers and 2 pyrgeometers
Measured components	Global solar irradiance (ESW↓), reflected solar irradiance (ESW↑), sky infrared radiation (EFIR↓), ground infrared radiation (EFIR↑)
Overall spectral range	0.3…45 µm
Temperature sensor	NTC
Operating temperature	−40…+80 °C
Degree of protection	IP65

Pyranometer
Measuring principle	Thermopile
Classification	Spectrally Flat Class C according to ISO 9060:2018
Typical sensitivity	5…15 µV/(W/m²)
Impedance	33…45 Ω
Measuring range	0…2000 W/m²
Viewing angle	2π sr
Spectral range (50%)	300…2800 nm
Spectral range (95%)	335…2200 nm

Pyrgeometer
Measuring principle	Thermopile
Typical sensitivity	5…10 µV/(W/m²)
Impedance	33…45 Ω
Measuring range	−300…+300 W/m²
Viewing angle	160°
Spectral range (50%)	5.5…45 µm

Materials and Construction
Housing and fixing shaft	Anodized aluminium
Screen	ASA
Pyranometer dome	Optical glass
Pyrgeometer window	Silicon
Pyrgeometer window coating	Scratch-resistant DLC coating
Salts compartment cover	Polycarbonate
Bird spikes	Stainless steel

Electrical
Power supply	Not required (passive instrument)
Electrical connectors	2 × 8-pole M12 connectors
Connector functions	Separate connectors for pyranometers and pyrgeometers
Typical sensor output impedance	Less than 50 Ω
Typical output signal	A few mV
Recommended reading instrument resolution	1 µV
Reading instruments	Voltmeter or data logger

Installation
Fixing shaft dimensions	Ø16 mm × 400 mm
Horizontal alignment	Integrated bubble level
Obstruction requirements	No obstructions above the horizontal plane; where unavoidable, obstructions should not exceed 10°
Shadow prevention	Install where no shadows are cast on the sensors throughout the day
Northern Hemisphere mast installation	Position south of the mast according to ISO TR9901 and WMO recommendations

Calibration
Calibration condition	Factory calibrated
Pyranometer calibration standard	ISO 9847:2023 (Type A1)
Pyranometer calibration method	Comparison with a reference pyranometer
Pyranometer calibration reference	Reference sample calibrated annually at WRC (World Radiation Center)
Pyrgeometer calibration method	Outdoor comparison with a reference standard pyrgeometer
Pyrgeometer calibration reference	Reference standard pyrgeometer calibrated at WRC
Recommended calibration check	Annually

Maintenance
Internal moisture absorption	Silica-gel desiccant
Installed desiccant cartridges	2
Desiccant condition monitoring	Humidity indicator marker
Typical desiccant lifetime	4…12 months, depending on operating environment
Optical surface cleaning	Water and standard lens-cleaning paper; pure ethyl alcohol if necessary, followed by water
Desiccant replacement	ESD-safe environment

Supplied Accessories
Bird spikes	2
Desiccant recharges	5 sets, each containing 2 silica-gel cartridges and 1 marker
M12 female free connectors	2, supplied only if optional cables are not ordered
Calibration report	Included

Optional Cables and Spare Parts
Installation cable series	CPM12AA8N…
Cable connection	8-pole M12 connector at one end, open wires at the other
5 m cable code	CPM12AA8N.5
10 m cable code	CPM12AA8N.10
Installation cable requirement	2 identical cables, ordered separately
Desiccant spare-part code	LPG2
LPG2 contents	5 desiccant recharges

Drawing

Downloads

LPNET14 Datasheet	DownloadLPNET14 Datasheet
LPNET14 User Manual	DownloadLPNET14 User Manual
LPNET14 CE Declaration of Conformity	DownloadLPNET14 CE Declaration of Conformity