FO-ALS and FO-SR-04 fiber-optic light sensor
Changes in the brightness of a lamp or indicator during an EMC test, measured from 1 to 10 000 lx and sent out over fiber.
- 1 to 10 000 lx
- Illuminance range
- 1.5 kHz
- Bandwidth
- 390 to 700 nm
- Wavelength range
- 60 h
- On 3 AA alkaline batteries
- Sensor channels2, with different sensitivities
- EMC validation200 V/m, 500 kHz to 18 GHz
- Pulsed field600 V/m, 1 to 2.5 GHz
- Dimensions172 × 76 × 25 mm
From dome lights to high beams
The FO-ALS measures changes in illuminance from light sources, over a range of 1 to 10 000 lx. That covers dome lights, indicators and even high-beam headlights.
Its two sensor channels have different sensitivities. Together they give a large dynamic range and keep sensitivity at low light levels. Bandwidth is 1.5 kHz, over wavelengths from 390 to 700 nm, and 3 AA alkaline batteries last 60 hours.
Shielding and input filtering protect the FO-ALS from EMI, EMP and the high voltages of plasma research. It is validated for EMC up to 200 V/m from 500 kHz to 18 GHz, and 600 V/m pulsed (5 % duty cycle, 5 µs rise time) from 1 to 2.5 GHz.

Specifications
| Illuminance range | 1 to 10 000 lx |
|---|---|
| Wavelength range | 390 to 700 nm |
| Channels | 2 (different sensitivities) |
| Bandwidth | 1.5 kHz |
| Battery life | 60 h |
| Battery type | AA alkaline (3 batteries) |
| Dimensions | 172 × 76 × 25 mm |
| EMC immunity, radiated field | 200 V/m (46 dBV/m) |
| EMC immunity, pulsed field | 600 V/m (5 % duty cycle, 5 µs rise time) |
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