Low-cost dust monitor for broken bag detection

sintrol dust monitor s301

On/Off Switch for filter leak detection

With two independent alarm relays, Sintrol’s S301 allows the end user to identify bag leaks and deterioration of filters.  Using our electric induction measurement principle, the dust monitor can be easily set up within 30 minutes of installation and gives plant operators quick notification of breaches in the filtration system.

Sintrol dust monitor allows end users to manually adjust alert and alarm level signals to tailor to their end needs.  Different probe lengths and coatings give flexibility to meet a variety of applications.

ATEX Models

  • Certified for ATEX Zone 20, 21 or 22
  • Approved to Category II 1/2 for Gas and Dust
  • IP65 Enclosure, Custom Designed ● Certification Type: II 1/2 GD EEx ia IIC, T6, IP65, 85°C
  • Utilizing SINTROL’s Advanced Inductive Electrification Technology

The ATEX directive covers health and safety of workers potentially at risk from exposure to explosive environments. This directive classifies areas into Zone 0, 1, 2 for gas and 20, 21 or 22 for dust and guides plant operators to install the appropriate ATEX certified systems. Products are required to be categorized by the level of protection that they offer against the risk of them becoming a potential source of ignition in an explosive atmosphere. The equipment conformity categories are 1, 2 & 3.

S300 Series dust monitors

Measurement ObjectsSolid particles in gas flow
Particle Size0.3 µm or larger
Measurement RangeFrom 0.1 mg/m³
Measurement PrincipleInductive Electrification
Protection CategoryIP65
Probe Length (total/measuring)500mm/440mm, 750mm/690mm (optional),1000mm/940mm (optional), others on request19.7″ / 17.3″, 29.5″ / 27.2″, 39.4″ / 37.0″ (optional), others on request
Power Supply115 VAC, 230 VAC or 24 VDC
Power ConsumptionDC model Max 3 W, AC model Max 8 W
Wiring Connections – Power SupplyDIN PG11 cable gland
Wiring Connections – Output SignalsDIN PG11 cable gland
Process ConnectionSocket (38 mm OD), quick clamp (optional), flange (optional)
Output Signals– Two SPDT relays: 5A, 24V AC/DC
Communication InterfaceSerial Communication RS-485
Range Set Up– Normal measuring range: automatic, based on average measured dust flow during setup procedure
– Extended measuring range: User selectable
Relay Alarm Settings
– Automatic, set at factory: Based on average measured dust flow
– User selectable ranges
Offset TrimAutomatic drift compensation
Signal Damping Time0 – 300 s
Relay Delay Time0 – 180 s

Process Conditions

Max 300°C, Max 700°C (optional)
Max 572 °F, Max 1292 °F (optional)
Max 200 kPa, Max 600 kPa (optional)
Max 43.5 PSI, Max 87 PSI (optional)
Gas VelocityMin 4m/s  ı  Min 13.1 ft/s
HumidityMax 95% RH (non-condensing)

Ambient Conditions

Temperature-20 to +45°C and to 60°C for 24 VDC-4 to 113 °F and to 140 °F for 24 VDC
HumidityMax 95% RH (non-condensing)
VibrationMax 5 m/s²  ı  Max 16.4 ft/s2


Probe (wetted part)Stainless steel (AISI 316L)
Probe Coating (wetted part)PTFE Teflon (optional)
Process Connection (wetted part)Stainless steel (AISI 316L)
Probe Insulation  (wetted part)PEEK
Probe Sealing (wetted part)FPM Viton
EnclosureAluminum alloy
Weight2.3kg  ı  5.1 lbs