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Continous dust monitor for post-ESP applications

As the only probe based dust monitor proven to be a reliable trend monitor after electrostatic precipitators (ESP), the Sintrol ESPY is one of its kind.  With the ability to neutralize the electrostatic field in the outlet duct of an ESP, the ESPY is able to give a trend of relative dust concentrations to help plant operators optimize the use of the ESPs. 

Industrial Applications:

  • Power/electricity generation
  • Cement industry
  • Chemicals industry
  • Metals industry
  • Paper industry

See application notes on our applications page.


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, 1000mm/940mm, 1500 mm/1440mm

19.7" / 17.3", 39.4" / 37.0", 59.1" / 56.7"

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

Flange (DN80), other flange types on request 

Output Signals

- Isolated 4 - 20 mA
- 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

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

Process Conditions


Max 250°C, Max >250°C on request  ı  Max 482 °F, Max >482 °F on request 


Max 300kPa, Max 600kPa (optional)  ı  Max 43.5 PSI, Max 87.0 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 60°C for 24 VDC  ı  -4 to +113 °F and 140 °F for 24 VDC


Max 95% RH (non-condensing)


Max 5m/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)

Faraday Cage (wetted part)

Stainless steel (AISI 316L) 

Probe Insulation (wetted part)


Probe Sealing (wetted part)

FPM Viton


Aluminum alloy


6.8kg  ı  15.0 lbs


E-Spy_brochure Download file »