Two genuine optics and detection-geometry calculators — real trigonometry, not marketing guesses. Get an instant visual estimate below, then have it properly verified at a free on-site survey.
A genuine optics calculator — not a guess. Pick a lens and a distance, and watch the exact field of view plotted using real trigonometry. Useful for sizing a driveway, yard or shopfront before we even visit.
A single wide-angle camera mounted centrally covers roughly this width, 10 m out — measured, not guessed.
Real-world coverage also depends on mounting height, obstructions and image detail needed for identification — always confirmed at your free on-site survey.
The same honest engineering approach, applied to intruder detection. Real PIR detector geometry — standard, wide-angle or corridor/curtain lenses — plotted to scale.
A single standard PIR mounted centrally covers roughly this width, 8m out — measured, not guessed.
Real-world coverage also depends on mounting height, pets, furniture and obstructions — always confirmed at your free on-site survey.