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Transmissive Visibility Meter
Portable Atmospheric transmissometer

SEM226VT Transmissive Visibility Meter

The SEM226VT Transmissive Visibility Meter is a highly responsive, portable instrument designed to measure road visibility and smoke concentration within tunnels. It features robust data processing capabilities, a user-friendly interface, and versatile output functions, providing real-time visibility readings for specific road sections and smoke concentration levels in tunnels, while also supporting data storage and comprehensive post-processing analysis.

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The SEM226VT Transmissive Visibility Meter is a highly responsive, portable instrument designed to measure road visibility and smoke concentration within tunnels. It features robust data processing capabilities, a user-friendly interface, and versatile output functions, providing real-time visibility readings for specific road sections and smoke concentration levels in tunnels, while also supporting data storage and comprehensive post-processing analysis.

Parameters

Measurement RangeVI (Visibility): 2–10,000 m; K (Smoke Concentration): 0–35×10⁻³ m⁻¹; T (Transmittance): 0–100%
Status DisplayLCD screen (numeric and alphanumeric display)
Test PrincipleLight transmittance
Measurement Error±2% (transmittance)
Ambient Temperature-55°C to +65°C
Ambient Humidity0–100% RH
Communication InterfaceRS232/RS485/USB
Power Supply Voltage220V ±15% VAC, 50Hz; 12V DC
Data StorageLocal data storage for over 72 hours
Protection RatingIP65
Total Weight18 kg (including instrument, carrying case, theodolite mount, etc.)

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