Keco Model 204 Hydrocarbon / VOC in Water Analyzer

In Model 204 PermaStream, liquid sample flows continuously into a heated transfer stripper; based on Henry's law, volatile hydrocarbons pass into carrier air. The air carries them to a tin oxide sensor or gas chromatograph. Aliphatic and aromatic compounds, including BTEX, are measured; results are given in ppb, ppm or up to saturation level.

• Early leak warning in cooling tower and heat exchanger waters.
• Monitoring produced water, wastewater and oil-water separator outlets.
• Stormwater, groundwater recovery points and condensate water.

• Continuous online analysis requiring no routine field calibration.
• Liquid verification with optional PermTube and automatic verification system.
• 4-20 mA, RS-485 Modbus, high/low alarm and sampling system diagnostic alarm.
• Hydrocarbon emission control unit and H2S scrubber options.

Because measurement is made by directly stripping free or dissolved hydrocarbon in water from the sample, it is important for the liquid sample to stay representative along the line. The sample point, line diameter and particle quantity should therefore be reviewed before installation.

Tetra assesses particle size, flow and temperature in the sample line and plans the pretreatment for Model 204. Periodic service visits are made for stripper cleaning, sensor checks and verification.