Illuminance Probe Delta Ohm DLP471PHOT

Measure light with laboratory‑grade confidence using the Delta Ohm DLP471PHOT, a professional illuminance probe with photopic V(λ) response and cosine correction. Designed for precision audits, compliance testing and lighting optimisation, it delivers stable, repeatable readings across very low to very high lux levels. Each probe is supplied factory calibrated and ready to integrate with compatible instruments, helping lighting designers, energy managers and HSE professionals obtain dependable results faster with less setup and lower uncertainty.

Key Benefits and Applications

• True-to-vision accuracy — Photopic V(λ) spectral matching ensures readings mirror the human eye’s response, ideal for workplace lighting verification, retail ambience tuning and architectural lighting design.
• Reliable results across wide ranges — Measures from near-dark conditions to bright industrial and outdoor scenes, supporting commissioning, energy retrofits and daylighting studies in one versatile probe.
• Confidence through calibration — Supplied with traceable calibration and tight uncertainty, reducing re‑tests and giving defensible evidence for audits and certifications.
• Consistent readings in the field — Cosine-corrected diffuser minimises angular errors, delivering trustworthy lux values even with oblique light or mixed sources.
• Built for daily work — Robust sensor head and stable electronics withstand frequent use on site, from offices and schools to warehouses, hospitals and production areas.
• Seamless integration — Compatible with Delta Ohm/Senseca portable photo-radiometers, enabling immediate use for spot checks, logging and reporting.

Featured technical specifications

• Measurement range and resolution — 0.10 to 200 000 lx with multi‑range auto/manual selection for optimal resolution down to 0.01 lx.
• Spectral conformity — Photometric filter matched to the standard photopic curve V(λ) for accurate illuminance measurements with common light sources.
• Cosine response — Diffuser engineered for adherence to the cosine law to reduce errors when light strikes the sensor at an angle.
• Accuracy framework — Class B performance according to CIE No. 69 with typical spectral mismatch f’₁ below 6% and cosine error f₂ below 3% to support compliance measurements.
• Linearity and stability — Linearity error typically below 1% with one‑year drift typically below 1% for dependable long‑term use.
• Calibration uncertainty — Typical combined calibration uncertainty below 4% with procedures aligned to international photometric standards.
• Temperature performance — Temperature coefficient typically below 0.05% per kelvin and operating range from 0 °C to 50 °C for indoor and field campaigns.
• SICRAM smart module — Embedded memory stores calibration data inside the probe, enabling plug‑and‑measure operation with compatible meters and simplifying recalibration logistics.
• Reference standards — Characterisation and verification aligned with CIE No. 69 and UNI 11142 to support formal testing and documentation.

Why this illuminance probe is the perfect choice

Choosing the DLP471PHOT at Stratosens.com means pairing a proven, standards‑compliant sensor with expert pre‑ and post‑sales support. Stratosens.com helps you configure the right meter–probe combination, provides calibration guidance, and ensures fast, reliable delivery so your projects stay on schedule. For precise, audit‑ready lux measurements with outstanding stability and integration ease, the DLP471PHOT from Stratosens.com is the smart, professional choice.