Sintrol S300 Series

Stack and process monitor for dust concentrations

Manage your dust concentrations with ease

  • • Automatic range setup
  • • No manual adjustment required
  • • Automatic drift compensation
  • • No alignment required
  • • Vibration has no effect on the reading

Wireless options are available on the 900MHz RF frequency. More about this can be found on our wireless products page.

Snifter S301

Used to detect filter deterioration and blockage or breakage. The two alarms can be used for process control in flow – no flow situations in bulk solids handling and pneumatic transport applications. Very fast response time.

Snifter S303

With a 4–20 mA analog signal output used for trend monitoring, S303 is installed downstream from a filter, cyclone, dryer or similar devices to monitor filter performance as well as particulate emissions.

Snifter S304

With the added feature of allowing calibration to give readings in mg/m3 format, it can give plant operators the ability to see absolute value measurements of dust concentrations.

Snifter S305

Equipped with a Self Zero and Self Span check, the S305 meets all QAL1 requirements for official emissions regulations, as proven by its TÜV certification.

Technical Specifications


Measurement Objects Solid particles in a gas flow
Particle Size 0.3 µm or larger
Measurement Range From 0.1mg/m³
Measurement Principle Inductive Electrification
Protection Category IP65
Probe Length (total/measuring) 500 mm / 440 mm, 750 mm / 690 mm (optional), 1000mm / 940 mm (optional), others on request

19.7" / 17.3", 29.5" / 27.2", 39.4" / 37.0" (optional), others on request
Power Supply 115 VAC, 230 VAC, or 24 VDC
Power Consumption DC model: Max 3 W, AC model: Max 8 W
Wiring Connections - Power Supply DIN PG11 cable gland
Wiring Connections - Output Signals DIN PG11 cable gland
Process Connection Socket (38 mm O.D.), quick clamp (optional), flange (optional)
Output Signal Isolated 4 - 20 mA output (not available in S301)
Two SPDT relays: 5 A, 24 V AC/DC
Communication Interface Serial communication RS-485
Range Set-up Normal measuring range: Automatic, based on average measured dust flow during setup procedure
Extended measuring range: User selectable (not available in S305)
Relay Alarm Settings Automatic (Set at factory): Based on average measured dust flow
User selectable ranges
Offset Trim Automatic drift compensation
Signal Damping Time (mA) 0 - 300 s
Relay Delay Time 0 - 180 s
Process Conditions
Temperature -20 to +45 C (60 C for 24 VDC)
-4 to 113 F (140 F for 24 VDC)
Max 300 C | Max 700 F (optional)
Max 572 C | Max 1292 F (optional)
Pressure Max 300 kPa, higher on request
Max 43.5 PSI, higher on request
Gas Velocity Min. 4 m/s | Min. 13.1 ft/s
Humidity max 95 % RH (non-condensing)
Vibration Max 5 m/s² | Max 16.4 ft/s²
Materials and Weight
Probe (wetted part) Stainless Steel (AISI 316L)
Probe Coating (wetted part) PTFE Teflon (optional)
Process Connection (wetted part) Stainless Steel (AISI 316L)
Enclosure Aluminum alloy
Probe Insulation (wetted part) PEEK
Probe Sealing (wetted part) FPM Viton
Weight 2.3 kg | 5.1 lb

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