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Testo
Testo 540 Pocket Pro Light Meter
Quote on request
No online payment · add lines to RFQ BOM
Pocket lux meter; 0–99,999 Lux; ±3%; IP40. RFQ + selection help.
Download datasheet PDF
RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Measuring range
0 to 99999 Lux (0 to 9300 ftc)
Accuracy
±3 Lux or ±3% of m.v. (vs reference at 90° incidence)
Sensor
Silicon photodiode matched to human-eye spectral sensitivity
Resolution
1 Lux (0…19999); 10 Lux (remaining)
Measurement Rate
0.5 s
Operating Temperature
0 to +50°C
Fits pocket illuminance checks where you need a Testo 540 covering 0–99,999 Lux (0–9300 ftc) with ±3 Lux or ±3% accuracy and ~200 h AAA battery life.
Key advantages
- Range — 0 to 99,999 Lux (0 to 9300 ftc)
- Accuracy — ±3 Lux or ±3% of measured value (90° incidence)
- Sensor — Silicon photodiode matched to human-eye response
- Resolution — 1 Lux to 19,999; 10 Lux above
- Form — 133×46×25 mm; 95 g; IP40; 2× AAA ~200 h
Typical applications
- Workplace lighting spot checks.
- Pocket Lux surveys.
- Quick Fc/Lux conversion field reads.
Selection guide
- Lux vs ftc — Display preference
- Accuracy class — ±3% adequate?
- IP40 — Indoor dry use
- Size — Pocket form factor
Common mistakes
- Measuring off-axis without incidence awareness.
- Expecting datalogging class meters.
- Wet/dusty use beyond IP40.
When to RFQ / what to tell us
- Quantity; ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 25831 |
| Brand | Testo |
| Model | Pocket Pro 540 Light Meter |
| Product type | Light Meter |
| Sensor | Silicon photodiode matched to human-eye spectral sensitivity |
| Measuring range | 0 to 99999 Lux (0 to 9300 ftc) |
| Accuracy | ±3 Lux or ±3% of m.v. (vs reference at 90° incidence) |
| Resolution | 1 Lux (0…19999); 10 Lux (remaining) |
| Measurement rate | 0.5 s |
| Operating temperature | 0 to +50°C |
| Protection | IP40 |
| Power | 2× AAA; typical 200 h without display illumination |
| Dimensions | 133 × 46 × 25 mm |
| Weight | 95 g incl. batteries and protective cap |
Documents
FAQ
Q: Lux range? A: 0 to 99,999 Lux.
Q: Accuracy? A: ±3 Lux or ±3% of measured value.
Q: What should I send for a quote? A: Quantity and ship-to.
Links
| Parameter | Value |
|---|---|
| Measuring range | 0 to 99999 Lux (0 to 9300 ftc) |
| Accuracy | ±3 Lux or ±3% of m.v. (vs reference at 90° incidence) |
| Sensor | Silicon photodiode matched to human-eye spectral sensitivity |
| Resolution | 1 Lux (0…19999); 10 Lux (remaining) |
| Measurement Rate | 0.5 s |
| Operating Temperature | 0 to +50°C |
| Protection | IP40 |
| Power | 2× AAA; typical 200 h without display illumination |
| Dimensions | 133 × 46 × 25 mm |
| Weight | 95 g incl. batteries and protective cap |