Technical specifications

Measurement technology

Membrane-covered, amperometric potentiostatic 3-electrode system

Measuring principle

Amperometry

Parameters

Free chlorine with reduced pH dependence

Measuring range

0...2 mg/L, 0...20 mg/L

Accuracy

Measuring range 2 mg/L:

at 0.4 mg/L < 1 %

at 1.6 mg/L < 1 %

Measuring range 20 mg/L:

at 4 mg/L < 1 %

at 16 mg/L < 3 %

Response time

T90: approx. 2 min

Run-in time

For initial commissioning approx. 2 h

Drift

approx. -1 % per month

Temperature compensation

Automatic, through integrated temperature sensor; temperature jumps must be avoided

Housing material

Microporous hydrophilic membrane, PVC-U, stainless steel 1.4571

Dimensions (Lx Ø)

~ 205 mm x 25 mm

~ 8.1” x 1”

interface

RS-485, Modbus RTU

Power supply

9 – 30 VDC

Connection

8pin M12 plug

Maintenance interval

Typically once a week

System compatibility

Modbus RTU

Warranty

1 year (EU&US: 2 years) on electronics;
wearing parts are excluded from the warranty

Process pressure

With retaining ring

3 bar*

~ 43.6 psi*

Without retaining ring

0.5 bar*

~ 7.3 psi*

Calibration method

Chlorine determination with DPD-1 method

*No pressure surges and/or vibrations

Process temperature

0...+45 °C**

~ +32...+113 °F**

Flow rate

Approx. 15...30 L/h in FLC-3, slight flow dependency is present

pH range

pH 4 ... pH 9, reduced pH value dependency

Conductivity

10 μS/cm...50 mS/cm (seawater)

Cross influences

Combined chlorine increases measured value

**No ice crystals in the sample water