Senseca PYRAsense03 class C pyranometer with MODBUS-RTU output

Related instruments Pyranometers, Weather station

Shown below is a Senseca PYRAsense03 class C pyranometer with MODBUS-RTU output:

Top view
Botton view

The new PYRAsense series pyranometers are equipped with diagnostic sensors of internal temperature, pressure, and humidity. The meters are with compact size and easy to mount.

Related instruments

Class A albedometer with data logger and tripod

Related instruments Pyranometers, Weather stations, Wireless & web data loggers

We recently supplied an ISO 9060 spectrally flat Class A albedometer with a data logger and tripod to a customer in Singapore. Shown below are a photo of the system and a screenshot of the data logging software.

Listed below are the components in the system:

Small and light class C pyranometer: LPPYRA-Lite

Related instruments Pyranometers

Delta Ohm just released a new pyranometer product LPPYRA-Lite with the following features:

  • Spectrally flat class C according to ISO 9060:2018
  • With thermopile sensor
  • Output type: mV (default) or 4-20 mA (on request)

The weight of the pyranometer is only 150 g. It is suitable for small PV power plant monitoring or general solar radiation measurements. Please click the pyranometer photo below for the datasheet.


Instruments for on-site solar irradiance and daylight illuminance monitoring

Related instruments Pyranometers, wireless & web data loggers, Light & radiation

Related services On-site testing & monitoring

A monitoring system was integrated and configured by OTM for on-site solar irradiance and daylight illuminance monitoring. The following Delta Ohm products were used:

The system is a fully automated system. The results are automatically logged and uploaded to the cloud, without site visits and manual operations.

The instruments (left: two sensors; right: wireless data logger)
Result page on Delta Ohm cloud

On-site glass optical & thermal performance monitoring system

Related services Glass optical & thermal properties

Related instruments Pyranometers, Wireless & web data loggers, Light & radiation, On-site testing & monitoring

A measurement system was integrated by OTM for on-site glass optical & thermal performance monitoring. The system uses off-shelf sensors and wireless data loggers and can be easily deployed for 24×7 glass performance monitoring projects.

Measurement principle

The system consists of two indoor measurement systems (reference room vs. test room) and one outdoor measurement system. Shown below are the system schematics.

Instruments in an indoor measurement system (in total two sets, one for the reference room and one for the test room)
Instruments in the outdoor measurement system (one set only)

The following quantities are measured:

  • Indoor side (4 quantities): daylight illuminance [lux], solar irradiance [W/m2], air temperature [°C] and glass surface temperature [°C]
  • Outdoor side (3 quantities): daylight illuminance [lux], solar irradiance [W/m2], air temperature [°C]

What cannot be measured?

The system is for glass optical & thermal performance monitoring only. The results are qualitatively correlated to glass visible light transmittance and solar energy transmittance.

However, it is not possible to quantitatively evaluate glass optical & thermal properties rated under standard conditions (e.g. visible light transmittance, U-value, and shading coefficient) from the monitoring results. If such quantities are required, please consider our laboratory glass testing service.


The following instruments from Delta Ohm were used in the monitoring system:

Necessary mounting accessories were included. The instruments can be conveniently installed on-site in less than 1 hour. Shown below is a photo of the outdoor side instruments in the demo installation.

Outdoor side instruments in the demo installation


Shown below is a screen capture of some monitoring results (in the wireless data logger control software).

An in-house software can be used to automate the data processing part, as shown below.

Shown below are some sample results: