DEOX 2000 Analyzer for SO2 Dechlorination

Summary

Product identification

The DEOX/2000® is a dechlorination measurement module for on-line analysis of sulfite and total chlorine residuals. It is designed for use with either the SFC or MFC electronic packages.

Applications

• Municipal wastewater chlorination / dechlorination processes
• Cooling water
• Industrial process water and wastewater

Standard Features

• Continuous, on-line measurement of both sulfite and chlorine residuals
• Five operating ranges available:
  • 0.5mg/L SO₂ - 0.5mg/L Cl₂
  • 1.0mg/L SO₂ - 1.0mg/L Cl₂
  • 2.5mg/L SO₂ - 2.5mg/L Cl₂
  • 5.0mg/L SO₂ - 5.0mg/L Cl₂
  • 10.0mg/L SO₂ - 10.0mg/L Cl₂
• Proven, amperometric, three-electrode measuring cell
• Unaffected by varying water quality, turbidity, temperature, or conductivity
• Stable chloramine-T reagent for iodine bias generation

Optional Features

• Choice of peristaltic pump speed (1 rpm for monitoring, 2 rpm for control)
• Sample line dosing with a biocide metering pump to prevent biofouling
• Circular chart recorders with "zero-centered" chart ranges

Technical Data

Type of Measurement

Amperometric. Continuously measures and indicates Sulfite or Chlorine residuals.

Accuracy

+/- 5% of full scale (over the range from SO₂ to Cl₂ residual).

Sensitivity

2% of full scale.

Repeatability

0.001 mg/L or 1% of full scale, whichever is greater.

Stability

+/- 5% of full-scale for 1 month under favorable conditions. Recalibration may be required upon replenishment of the Iodate reagent.

Speed of Response

• 90 seconds with 2 rpm pump motor.
• 180 seconds with 1 rpm pump motor.

Output Signal

Isolated 4-20mA DC analog output proportional to residual, zero centered. Maximum impedance 600 ohms.

Sample Requirements

• Approximately 10 to 20 l/m (2 - 5 US gpm).
• Recommended fluid velocity: 1.5 m/sec (5 ft/sec).
• Maximum pressure: 8 bar (125 psi), throttled to less than 0.3 bar (5 psi) at the Y-strainer inlet.
• Measuring cell sample requirement: 0.5 l/m.

Reagents

• pH 4 buffer solution.
• Potassium Iodate solution.
• Detergent (added to pH 4 buffer).

Salinity

Fresh to sea water.

Piping Connections

• Sample line: 13 mm (1/2”) female NPT.
• Drain hose: 1 mm (3/8”) and 32 mm (1-1/4”).

Temperature

• Ambient: 2°C (35°F) to 52°C (125°F).
• Sample: -3° C (26°F) to 52° C (125°F).

Mounting

Wall or control panel mounting.

Dimensions (W x H x D)

331 x 329 x 251 mm (13-1/16” x 12-15/16” x 9-13/16”).

Shipping Weight

9 kgs (20 lbs).

SFC Electronics

Output Contacts

4 configurable alarm contacts / general fault messages, inc/dec control outputs. Max. 5A, 250 VAC, 1250 VA; Max. 5A, 220 VDC, 150 W.

Analog Outputs

1 available 0/4 to 20 mA, configurable. Load <500 Ohm, accuracy < 0.5% FS. Galvanically isolated up to 50V.

Interfaces

RS 232; RS 485.

Power Supply

• 100 - 240 VAC ±10%, 50-60 Hz, 30VA
• 24 VDC ±20%, 30 W

Protection Category

IP 66 / NEMA 4X.

Dimensions (W x H x D)

270 x 147 x 185 mm (10-5/8” x 5-13/16” x 7-1/4”).

Shipping Weight

2 kg (4.4 lbs).

MFC Electronics

Output Contacts

8 configurable alarm contacts / general fault messages, inc/dec control outputs. Max. 5A, 250 VAC, 1250 VA; Max. 5A, 220 VDC, 150 W.

Analog Outputs

4 available 0/4 to 20 mA, configurable. Load <1000 Ohm, accuracy < 0.5% FS. Galvanically isolated up to 50V.

Interfaces

RS 232; RS 485.

Power Supply

• 200 - 240 VAC ±10%, 50-60 Hz, 30VA
• 100 - 120 VAC ±10%, 50-60 Hz, 30VA
• 24 VDC ±20%, 30 W

Protection Category

IP 66 / NEMA 4X.

Dimensions (W x H x D)

320 x 270 x 175 mm (12-5/8” x 10-5/8” x 6-7/8”).

Shipping Weight

5.5 kg (12.1 lbs).

Accessories Furnished

Y-strainer, shut-off valve, two manual throttling valves for sample waterline, 3 ft. tubing for analyzer drains, 2 empty 1-gallon reagent bottles, pH 4 buffer (15 liters / 4 US gallons), Potassium Iodate (4.8 oz bottle and 1 lb granular), detergent (6 oz), tube of grit, instruction book, 3-way valve for calibration with de-ionized water.

Optional Accessories

Recorders, metering pump for sample line dosing system, amperometric titrator for calibration, sample pump, spare reference junction, door lock for analyzer enclosure.

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Disclaimer

This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror