Lumios MkIII
Luminance Photometer for Tunnels
The LUMIOS MkIII measures the level of luminance, or brightness, at the tunnel entrance / exit to ensure that the visual perception of drivers is maintained.
Lumios MkIII
The LUMIOS-MkIII measures the level of brightness or luminance created by natural light around tunnel portals. When integrated with a managed tunnel lighting system, the measurements provided by the LUMIOS-MkIII will ensure that the visual perception of drivers is maintained during the day and at night. This avoids sudden variations in lighting and potential “black hole effect” when entering and exiting a tunnel. .
The LUMIOS-MkIII has onboard SCADA / PLC interface options, including Current Outputs, Digital Relays and RS485 (Modbus RTU). The viewing angle can be specified between 8° and 40°. Optional wipers and pumped washer systems are also available for more demanding environmental conditions. The LUMIOS-MkIII is available with both AC and DC power supplies.

Features
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Measurement of luminance, or brightness, created by natural light at the tunnel portals
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Variable viewing angle within a range of 8 to 40º (factory preset)
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Silicon photo diode, Vλ filtered for spectral response close to that of the average human eye
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Rugged 316 stainless steel construction with IP66 protection rating
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Heated window and enclosure
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Suitable for measurement of luminance within the tunnel
Benefits
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Designed specifically for monitoring tunnel portals
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Rugged design to withstand extremes of weather conditions
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Simple installation and mounting
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Optional wash-wipe facility to minimise maintenance requirements
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Flexible integration options
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CIE Approved measurement of L20
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Self-contained intelligent analyser for direct connection to host controller
Specification
Measurement Performance
No. | Parameter | Units | Min | Max | Comment |
---|---|---|---|---|---|
1 | Detector | Silicon photo diode, Vλ filtered | |||
2 | Viewing Angle (FWHM) | Deg | 8 | 40 |
1⁰ steps (defined at time of order) 20⁰ as standard Special angles on request – contact the factory |
3 | Measurement Range | cd/m2 | 0 | 10,000 | Can be scaled within this range |
4 | Resolution | cd/m2 | 1 | Display resolution | |
5 | Accuracy | % | -3 | +3 | Better than |
6 | Damping | seconds | 1 | 100 | Default setting is 10s |
Power - AC LUMIOS
No. | Parameter | Units | Min | Max | Comment |
---|---|---|---|---|---|
7 | Voltage | Vac | 85 | 264 | Nominal 100-240Vac |
8 | AC Input Frequency | Hz | 47 | 63 | Nominal 50-60Hz |
9 | Power Consumption | W | 6 |
10 50 |
Without wash wipe With wash wipe |
Power - DC LUMIOS
No. | Parameter | Units | Min | Max | Comment |
---|---|---|---|---|---|
10 | Voltage | Vdc | +24 | ||
11 | Voltage Tolerance | % | +15 | +15 | |
12 | Nominal Current Consumption | mA | 500 | With wash wipe | |
13 | Power Up Current Consumption | 1500 |
Interface Options
No. | Parameter | Units | Min | Max | Comment |
---|---|---|---|---|---|
14 | Serial outputs |
Modbus RTU via RS485 (isolated) External USB | |||
15 | Analogue Outputs (One) | mA | 0 / 2 / 4 | 20 | Isolated and scalable (user selected) |
16 | Digital Relay Contacts (four) | A |
0 0 |
1 3 |
@240Vac (AC LUMIOS) @30 Vdc (DC LUMIOS) |
Physical
No. | Parameter | Units | Min | Max | Comment |
---|---|---|---|---|---|
17 | Ingress Protection | IP66 | |||
18 | Operating Temperature | °C |
-40 -40 |
+50 +70 |
AC powered LUMIOS DC Powered LUMIOS |
19 | Operating Humidity | % | 100 | ||
20 | Materials | AISI/SAE 316L Stainless steel | |||
21 | Dimensions | mm |
Without optional wiper - 463 x 162 x 122 With optional wiper - 463 x 162 x 184 | ||
22 | Weight | kg |
5.5 6.3 |
Without optional wiper With optional wiper | |
23 | Regulatory Compliance |
2014/30/EU (Electromagnetic Radiation) 2014/35/EU (Low Voltage) | |||
24 | Design Life | Years | 20 | ||
25 | MTBF | Years | >20 | ||
26 | Warranty | Months | 24 | Return to base Warranty. Extension available |
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