Combined probe sensor

Single rod measurement probe for simultaneous measurement of
- Dust concentration [mg/Nm³]
- Volume flow [Nm³/h]
- Temperature [°C]
- Absolute pressure [hPa]

Features
● Only one probe/ installation opening in the exhaust gas channel
● Compact design
● No moving parts
● Automatic zero and reference point check

Applications
● For measurements in accordance with TI Air (Technical Instructions for Maintaining Air Purity), 13., 17. and 27. BImSchV
✖ Not suitable for use behind electrostatic precipitators. Please consult us

Approvals
● Suitability-tested by the TÜV Cologne, test report 936/800006/A
● MCERTS

Measuring principle
● The dust concentration is determined according to the triboelectric measuring principle. The tribo probe measures the electric charge of the impinging particles.
● The measurement of the volume flow is based on the mechanical action principle. The probe has two separate chambers, between which a differential pressure builds up under flow.
● The absolute pressure in the flue gas is measured by a pressure transmitter in one chamber of the probe.
● The temperature is measured directly in the centre of the flue gas flow in a separate chamber within the probe with a temperature sensor.

Options
● Weather protection cover
● Switch-over cock for back purging/ zero point control
● Automatic cyclic probe back purging for high dust concentrations
● Hastelloy probes for corrosive gases
● Purge air connection at flange

measurements: dust concentration, volume flow, absolute pressure, temperature

measuring ranges: 0 ... 10 ... 0 ... 500 mg/Nm³
                            0 ... 9,999,999 Nm³/h 1)
                            0 ... 200 °C, optional 0 ... 350 °C
                            800 ... 1,300 hPa

measuring principle: dust: tribo electric volume flow: differential pressure
flue gas temperature: above dew point up to 200 °C, optional up to 350 °C, flue gas humidity <80%
flue gas pressure: -200 ... 200 hPa
duct diameter: 0.3 ... 5 m
ambient temperature: -20 ... +50 °C
protection: IP65
measuring outputs: 4x 0/ 4 ... 20 mA/ 500 Ohm, Modbus RTU (RS485)
digital outputs: 7 relay outputs, permissible load 48 V/ 0.5 A
digital inputs: 6 potential free inputs
detection limit: <2% of measuring range
power supply: 115/ 230 VAC, 50/ 60 Hz, 50 VA
dimensions (h x w x d) probe length: probes: 180 x 180 x (340 + probe length) mm 250, 400, 700, 1000 mm
weight: probe 9.5 kg, electronics 22 kg
probe back purging (option): purge air supply 3 bar
insulator purging (option): continuous purge air supply approx. 2 m3/h
remarks: flue gas velocity >5 m/s concentration after gravimetric calibration