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S304 Dust monitor

Emissions 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 a 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 optimized process conditions in the plant.

S300 Series dust monitors

Measurement Objects

Solid particles in gas flow

Particle Size

0.3 µm or larger

Measurement Range

From 0.1 mg/m³

Measurement Principle

Inductive Electrification

Protection Category


Probe Length (total/measuring) 

500mm/440mm, 750mm/690mm (optional),1000mm/940mm (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 (38mm OD), quick clamp (optional), flange (optional) 

Output Signals

- Isolated 4 - 20mA
- Two SPDT relays: 5A, 24V AC/DC

Communication Interface

Serial communication RS-485

Range Set Up

- Automatic, based on average measured dust flow during setup procedure

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

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 Velocity

Min 4 m/s  ı  Min 13.1 ft/s


Max 95% RH (non-condensing)

Ambient Conditions

-20 to +45°C and to 60°C for 24 VDC
-4 to 113 °F and to 140 °F for 24 VDC


Max 95% RH (non-condensing)


Max 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)


Probe Sealing (wetted part)

FPM Viton


Aluminum alloy


2.3 kg  ı  5.1 lbs


sintrol_s300_series_brochure_2016 Download file »