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Sintrol S304 Emission Monitor

Emission monitor that can be calibrated to give mg/m3 output

For applications requiring absolute value measurements of dust concentrations, the S304 can be calibrated to give the user an mg/m3 output.  Once calibrated, this dust monitor helps plant operators know exactly how much dust is passing through the stack or outlet duct of their plant.

The S304 is additionally equipped with a 4-20mA signal and two independent alarm relays that can be used to further optimize process conditions in the plant


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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 CodeIP66
Power supply
24 V DC ±10% 1
100 … 240 V AC ±10%, 50 / 60 Hz
Power consumptionUp to 10 W DC / AC
Output signals• 2 × Independent SPDT dry contact relays, max. 30 V DC / 5 A or 240 V AC / 5 A, cos φ = 1 • Isolated active 4 … 20 mA output loop, max. loop resistance 250 Ω + NAMUR NE 43 compliant alarms
Communication interface• 2 × Serial communication RS-485 • USB • Radio frequency (RF, Requires optional RF antenna )
Communication protocol• Modbus RTU (RS-485)
• Sintrol network (USB, RF and RS-485)

Physical Characteristics

Wetted parts• Probe: Stainless steel (316L)
• Insulation: Polyphenylene sulfide (Ryton R-4)
Weight1.5 kg (3.3 lbs)
Enclosure / casingAluminum
Weight1.5 kg (3.3 lbs)

Ambient Conditions

Temperature-40 … 60 °C (−40 … 140 °F) / -30 … 60 °C for Ex models
PressureMax. 95 % relative humidity (non-condensing)

Process conditions


• Max. 300 °C (572 °F) optionally up to 700 °C (1292 °F)

• Max. 250 °C (482 °F) with Teflon-coated probe
• Max 200 °C for Ex models


• Max. 600 kPa (87.02 psi) in temperatures up to 300 °C (572 °F)
• Max. 300 kPa (43.51 psi) in temperatures from 300 °C (572 °F) to 700 °C (1292 °F) when

high-temperature process connection is used

Flow velocityMin. 3 m/s (9.84 ft/s), max. tested 40 m/s (131.23 ft/s)

Wireless communication*

Frequency bands• 868 MHz, 15 channels
• 915 MHz (license-free ISM band)
Transmit powerUp to +23 dBm, user-adjustable
Receiver sensitivity-110 dBm
Communication protocolIECEx/ATEX: II 2 D Ex ia tb IIIC T200 93°C …201°C Db Ta= -30°C to +60°C
US: Zone 20 A Ex ia ta IIIC T85°C…T201°C Da | CAN: Ex ia ta IIIC T85°C…T201°C Da US/CAN: CL II, DV 1, GP E, F, G. IS Probe Ta= -30°C to +60°C


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