Measured values	Scattered light intensity, dust concentration (after gravimetric comparison measurement)
Measurement principles	Scattered light forward
Spectral range 640 nm ... 660 nm Laser, protection class 2, power < 1 mW
Measuring ranges Scattered light intensity 0 ... 7.5 SI / 0 ... 3,000 SI Measuring ranges freely selectable; nine measuring ranges pre-configured (0 ... 7.5/15/45/75/150/225/375/1,000/3,000 SI)
Response time (t90)	0.1 s ... 600 s Freely adjustable via SOPAS ET software
Accuracy ± 2 % Of measuring range full scale
Process temperature –40 °C ... +220 °C
Process pressure With external purge air unit –50 hPa ... 30 hPa With instrument air (provided by the customer) –50 hPa ... 100 hPa
Process gas humidity Non-condensing
Duct diameter ≥ 0.15 m
Ambient temperature –40 °C ... +60 °C
Conformities	TUEV type-examination
Electrical safety	CE
Enclosure rating IP65
Analog outputs	1 output: 0/4 ... 20 mA, 750 Ω Electrically isolated
Digital outputs	3 relay contacts: 48 V, 1 A For status signals
Digital inputs	4 inputs: For external maintenance switch, automated operational check, linearity measurement, calibration curve switching, or filter monitoring
Serial ✔ Type of fieldbus integration RTU RS-485 Function For connection of a MCU control unit or as service interface
Modbus ✔ Type of fieldbus integration RTU RS-485
Model	Without integrated purge air unit
Dimensions (W x H x D) 173 mm x 167.5 mm x 437 mm (for details see dimensional drawings)
Nominal length	280 mm
Weight ≤ 2.7 kg
Mounting	Mounting flange, Tri-Clamp
Energy supply Voltage 24 V DC Power consumption ≤ 4 W
Test functions	Automatic self-test (linearity, drift, aging) Manual linearity test with reference filter
Options	MCU control unit External purge air unit

As Mnelko, we are a reliable partner in industrial automation solutions, offering high-quality and innovative products with a wide product range to meet all the needs of your business. Our product portfolio consists of solutions designed based on the principles of high performance, durability, and efficiency to support modern industrial processes.
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