Sintrol ESPY

Stack and process monitor for dust concentrations

Sintrol ESPY

E-Spy brings an alternative ESP (Electrostatic Precipitator) control solution to the previous high cost and high maintenance options. By using this new dust monitor, the operator can:

  • Constantly optimize the operating parameters of the ESP; minimize measurement down time
  • Judge the performance of the ESP based on output signal; identify maintenance needs
  • Simplify the optimization of the rapping system; decrease energy costs and emissions
  • Save on operating costs – ESPs can be run with the lowest possible energy consumption while still complying with authority requirements
E-Spy is a revolutionary process monitor that helps optimize the performance of an Electrostatic Precipitator (ESP) using state-of-the art probe based technology. Recently developed by our engineers and evaluated by research institutes in Finland, our monitors continuously track the particulate measurements downstream from the ESP enabling plants to not only adhere to the strictest emission regulations, but also reduce overall energy costs. With hundreds of installations worldwide, this has become a fastest growing process control device since it both outperforms and is much more cost effective than the alternative optical monitors.

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, 1000mm / 940 mm, 1500 mm / 1440 mm
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 Signal Isolated 4 - 20 mA output
Two SPDT relays: 5 A, 24 V AC/DC
Serial communication RS-485
Communication Interface Modbus RTU (RS485)
Range Set-up Normal measuring range: Automatic, based on average measured dust flow during setup procedure
Manual 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 10 - 300 s
Process Conditions
Temperature Max 250 C (>250 C on request) | Max 482 F (>482 F on request)
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)
Ambient Conditions
Temperature -20 to +45 C (+60 C for 24 VDC) | +4 to +113 F (140 F for VDC)
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)
Faraday Cage (wetted part) Stainless Steel (AISI 316L)
Enclosure Aluminum alloy
Probe Insulation (wetted part) PEEK
Probe Sealing (wetted part) FPM Viton
Weight 6.8 kg | 15.0 lb

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