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Sintrol S303 Dust Monitor

Trend monitor with 4-20mA output for continuous dust measurement

Continuous trend monitor that gives plant operators to see the performance of the filtration systems and ducts over a period of time.  Perfect for installation after any filtration system or in common line channels leading into the emissions points of a plant.

State of the art Inductive Electrification principle minimizes the need for maintenance on the dust monitor and provides an accurate trend for end users.  4-20mA output combined with an easy-to-use auto-setup feature that takes less than 30 minutes from installation makes the device both convenient and reliable.


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  • Features Standard [x] Optional [o]

    Rugged IP66 rated Aluminum pressure casted enclosure

    Quick clamp process connection for easy installationxx

    Green, yellow and red LED for status indication

    Auto setup function for efficient commissioningxx

    Two dry contact relays to indicate dust alert and dust alarm

    The Instrument can be powered with 24 VDC or 100 to 240 VACxx

    USB interface for convenient connection during commissioning

    Dust-Tool easy software for parametrization and setupxx

    Normalized during production to ensure identical instruments and quality

    Linearized during production to standard test dust (Arizona Road Dust)xx

    RS485 to communicate with Modbus RTU or Sintrol protocol

    Bright green illuminated 4-digit display and buttons for local setup and statusxx

    Isolated and active mA-output, with NAMUR NE 43 compliant alarms

    Zero and span check with automatic drift compensationx

    Calibration possibility to read directly mg/m3

    Flow speed compensation by the mA-output of a third party measurement devicex

    Wireless Network capability to avoid cabling cost and extensive installation

Measurement ObjectsTotal Suspended Particles (TSP)
Measurement RangeDetection Limit 0,01 mg/m³
Maximum Range up to several g/m³, depending on conditions
Measurement PrincipleInductive Electrification
Protection CodeIP65
Power supply24 VDC and 80-240 VAC
Power consumptionUp to 10 W
Output signals• Two dry contact Relays, max 5A@30VDC / 5A@240VAC
• Isolated 4-20 mA output loop
Communication interface• Serial communication RS-485
Communication protocol• Modbus RTU (RS-485)
• Sintrol network (USB, RF and RS-485)

Ambient Conditions

Temperature-40°C to +60 °C (-40 °F to 140 °F)
HumidityMax 95% RH (non-condensing)

Materials and Weight

Enclosure / casingAluminum
Weight1.5 kg (3.3 lbs)

Process conditions

TemperatureMax 200 °C (392 °F) default, optionally up to 700 °C (1292 °F)
PressureMax 300 kPa default, optionally up to 6000 kPa
HumidityMax 95% RH (non-condensing)
Temperature– Starting -20 to +40°C ı -4 to 104 °F – Running -20 to +60°C ı -4 to 140 °F
HumidityMax 95 % RH (non-condensing)

Wireless Communication

(only for RF models)

Frequency band868 MHz or 915 MHz, 15 channels
Transmitting powerUp to +23 dBm, user-adjustable
Receiver sensitivity-110 dBm
Communication protocolProprietary Sintrol Network protocol
Typical range• 868 MHz Version
• Up to 1000 m (3280 ft) in an urban environment
• NOTE: The RF communication range is highly affected by the surrounding
structures and other RF devices.


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