Smart environmental monitoring solutions
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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S303 | S304 |
Rugged IP66 rated Aluminum pressure casted enclosure |
x | x |
Quick clamp process connection for easy installation | x | x |
Green, yellow and red LED for status indication |
x | x |
Auto setup function for efficient commissioning | x | x |
Two dry contact relays to indicate dust alert and dust alarm |
x | x |
The Instrument can be powered with 24 VDC or 100 to 240 VAC | x | x |
USB interface for convenient connection during commissioning |
x | x |
Dust-Tool easy software for parametrization and setup | x | x |
Normalized during production to ensure identical instruments and quality |
x | x |
Linearized during production to standard test dust (Arizona Road Dust) | x | x |
RS485 to communicate with Modbus RTU or Sintrol protocol |
x | x |
Bright green illuminated 4-digit display and buttons for local setup and status | x | x |
Isolated and active mA-output, with NAMUR NE 43 compliant alarms |
x | x |
Zero and span check with automatic drift compensation | x | |
Calibration possibility to read directly mg/m3 |
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Flow speed compensation by the mA-output of a third party measurement device | x | |
Wireless Network capability to avoid cabling cost and extensive installation |
o | o |
Measurement Objects | Total Suspended Particles (TSP) |
Measurement Range | Detection Limit 0,01 mg/m³ Maximum Range up to several g/m³, depending on conditions |
Measurement Principle | Inductive Electrification |
Protection Code | IP66 |
Power supply |
24 V DC ±10% 1
100 … 240 V AC ±10%, 50 / 60 Hz
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Power consumption | Up 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 |
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Enclosure |
Aluminium |
Wetted parts | • Probe: Stainless steel (316L) • Insulation: Polyphenylene sulfide (Ryton R-4) |
Weight | 1.5 kg (3.3 lbs) |
Enclosure / casing | Aluminum |
Weight | 1.5 kg (3.3 lbs) |
Ambient Conditions |
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Temperature | -40 … 60 °C (−40 … 140 °F) / -30 … 60 °C for Ex models |
Pressure | Max. 95 % relative humidity (non-condensing) |
Process conditions |
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Temperature |
• Max. 300 °C (572 °F) optionally up to 700 °C (1292 °F) • Max. 250 °C (482 °F) with Teflon-coated probe |
Pressure |
• Max. 600 kPa (87.02 psi) in temperatures up to 300 °C (572 °F) high-temperature process connection is used |
Flow velocity | Min. 3 m/s (9.84 ft/s), max. tested 40 m/s (131.23 ft/s) |
Wireless communication* |
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Frequency bands | • 868 MHz, 15 channels • 915 MHz (license-free ISM band) |
Transmit power | Up to +23 dBm, user-adjustable |
Receiver sensitivity | -110 dBm |
Communication protocol | IECEx/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 |