Conductivity Measurement in Wet Gas Scrubbers
Monitoring Scrubbing Chemical Concentration with Conductivity
Resist Coating & Corrosion of Conductivity Sensors
Conductivity is measured in wet gas scrubbers to determine when scrubbing water has accumulated too many solids and needs to be blown down and replaced with makeup water. Additionally, batch scrubbers often use conductivity instead of pH to monitor scrubbing effectiveness. This process often coats conductivity sensors and can lead to corrosion. The Rosemount™ 228 Toroidal Conductivity Sensor is a good choice for most wet gas scrubbers. In applications where there is a large loading of particulates, the large bore Rosemount 226 Toroidal Conductivity Sensor or the Rosemount 242 Flow Through Toroidal Conductivity Sensor (for extreme cases), may be preferred.
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Product Solutions
The Rosemount 228 Toroidal Conductivity Sensor reliably measures conductivity in highly conductive electrolyte solutions up to 2 S/cm (2,000,000 µS/cm). These conductivity sensors work in dirty and corrosive applications where metal electrode sensors would otherwise fail. A robust sensor design makes the Rosemount 228 conductivity sensor ideal for measuring concentrations of acid, base and salt solutions.
- Meet challenging application requirements with a selection of chemical resistant body options including PEEK and Tefzel
- High vibration tolerance with reinforced internal metal frame design
- High temperature option for process temperatures up to 200 °C (392 °F) and suitable for use under high pressure up to 295 psig (2135 kPa [abs])
Process Connection
-20: 5/8 in. -11 UNC, -21: 3/4 in. MNPT
Valve Type
Recommended Valve: 1-1/2 in. full port ball valve
Materials of Construction
Wetted Materials:
Body Materials either glass-filled PEEK, glass-filled Tefzel™ or unfilled Tefzel; Option -20: EPDM gasket
Body Materials either glass-filled PEEK, glass-filled Tefzel™ or unfilled Tefzel; Option -20: EPDM gasket
The Rosemount 226 Toroidal Conductivity Sensor measures conductivity in highly conductive liquids up to 2 S/cm (2,000,000 μS/cm). This toroidal/inductive sensor has a robust fouling-resistant design which makes it ideal for measuring conductivity in harsh, corrosive and fibrous liquid applications.
- Toroidal sensor is resistant to plugging and suitable for liquids containing high levels of suspended solids due to large bore design
- Plugging resistant and suitable for liquids containing high levels of suspended solids due to large bore design
- High vibration tolerance with reinforced internal metal frame design
Temperature Range
32°F - 248°F (0°C - 120°C)
Maximum Pressure
295 psig (2135 kPa [abs])
Materials of Construction
Wetted Materials: Glass-filled PEEK, EPDM Gasket
The Rosemount 242 Flow Through Toroidal Conductivity Sensor features a noninvasive flow through design allowing for in-line installations without any obstruction to sample flow. This conductivity sensor is ideal for measuring conductivity in highly conductive liquids up to 2 S/cm (2,000,000 μS/cm) and for use in viscous, abrasive or fibrous liquids.
- Robust measurements - insensitive to process flow rate and direction
- Plugging resistant and suitable for liquids containing high levels of suspended solids
- Avoid accumulation of solids with no part of the conductivity sensor protruding into the sample flow
Measurement Range
Conductivity Range: 100 µS/cm to 2 S/cm
Weight
1" to 2": 22 lbs. (10kg)
3" to 4": 86 lbs. (39 kg)
3" to 4": 86 lbs. (39 kg)
Maximum Temperature
See Product Data Sheets for details.
The Rosemount 1058 Dual Channel Transmitter provides confident liquid analysis measurement in a wide range of industrial, municipal and commercial applications. It is a 4-wire powered device that provides multi-parameter liquid analysis for digital and analog sensors, including inputs from pH/ORP sensors, ISE, flow, current, conductivity sensors (contacting and toroidal), turbidity sensors and amperometric sensors (dissolved oxygen, chlorine and ozone).
- Supports continuous measurement of liquid analysis inputs from one or two sensors.
- Each sensor channel is independently configurable to support a wide selection of digital or analog liquid analysis sensors including pH sensors, ORP sensors, conductivity sensors, dissolved oxygen sensors, chlorine senors, turbidity sensors and more.
- IP66 / Type 4X rated engineered polymer enclosure with universal mounting options provides confident and easy installation indoors or outdoors.
Enclosure Rating
Type 4X, IP66
Dimensions
Overall 160 x 157 x 140 mm (6.3 x 6.2 x 5.5 in); Cutout 138.4 x 138.4 mm (5.45 x 5.45 in)
Weight
3 lb (1.5 kg)
