Measurement Guides & Knowledge Center
Practical measurement guides for plant light, soil conditions, lighting, UV, vehicle CO₂ and surge protection — organized by what you need to measure and understand.
Explore by what you need to measure.
Each topic guide explains the measurement problem first, then connects the relevant units, methods and EvoDevice tools.
Plant Light, Root Zone & Solar Measurement
Understand plant-light intensity, accumulated daily light, soil and root-zone conditions, and outdoor solar measurements.
Open Plants & Outdoor Measurement Guide →Lighting & Ultraviolet Measurement
Learn what Lux, CCT, spectral distribution, UVI, UVA and UVB describe — and why different optical measurements are not interchangeable.
Open Light & UV Measurement Guide →Cabin CO₂ & Ventilation Measurement
Understand changing vehicle-cabin CO₂, occupancy, ventilation, recirculation and what an NDIR CO₂ measurement can — and cannot — tell you.
Open Vehicle Air Quality Guide →Whole-House Surge Protection
Review panel-mounted SPD concepts, connected versus local status, and the role of whole-house surge protection in an electrical system.
Open Power & Surge Protection Guide →What question are you trying to answer?
Similar-looking instruments can measure fundamentally different variables. Start with the decision you need to make.
| If your question is… | Measurement to understand | Relevant EvoDevice area |
|---|---|---|
| How much plant-useful light is present right now? | PAR / PPFD | Plant & Outdoor Measurement |
| How much plant-useful light accumulated during the day? | DLI | Plant & Outdoor Measurement |
| How are root-zone moisture and temperature changing? | Soil moisture + root-zone temperature | Plant & Outdoor Measurement |
| How much solar power is reaching a surface now? | Solar irradiance in W/m² | Plant & Outdoor Measurement |
| How much solar energy accumulated over time? | Accumulated solar energy in kWh/m² | Plant & Outdoor Measurement |
| How bright is a space to human vision? | Illuminance in Lux | Light & UV Measurement |
| How warm or cool does a white light appear? | Correlated Color Temperature (CCT) | Light & UV Measurement |
| What UV exposure is present at the measurement point? | UVI / UVA / UVB | Light & UV Measurement |
| How is vehicle-cabin CO₂ changing during a drive? | CO₂ concentration in ppm | Vehicle Air Quality |
| Which whole-house surge protection approach fits the installation? | Panel-mounted SPD selection and status | Power & Surge Protection |
Definitions when you need them. Product comparison when you are ready.
Use the glossary for terminology and the product selection guide when you already know what type of measurement you need.
Measurement Glossary
Concise definitions for DLI, PAR, PPFD, Lux, CCT, spectrum, UVI, UVA, UVB, CO₂, NDIR, solar irradiance, accumulated solar energy and surge-protection terminology.
Open Measurement Glossary →Product Selection Guide
Compare EvoDevice tools by the measurement task rather than choosing only by product name or appearance.
Compare EvoDevice Products →Measurement concepts connected to real instruments.
These products cover different measurement jobs. They are grouped here by their primary use rather than presented as interchangeable tools.
Interpret the reading in context.
Measurement is more useful when the variable, method and limitations are clear.
How EvoDevice measurement guides are organized
Guides are written around the measurement task first. Product information is connected only after the measurement concept and intended application are clear.
Not sure which measurement fits your application?
Describe what you are trying to measure or monitor. EvoDevice can help point you to the relevant measurement guide or product category.