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S305 Dust monitor

TÜV certified stack monitor for official emissions measurements

TÜV certified to meet the EN 14181 (2004) standard, the S305 dust monitor is used for official emissions applications.  The state of the art dust monitor has been used in stack emissions for a number of state owned and private industrial applications around the world.

Utilizing our unique Inductive Electrification principle, the S305 brings the reliability the government requires and combines it with the convenience plant operators expect from a particulate measurement device.  With minimal maintenance required, this is an optimal solution for plant operators needing to measure stack dust emissions for government control.

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

Communication Protocol

Modbus RTU (optional) 

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 »