Hardness

Applications

Power plants
Cooling water
Water steam cycle
Boiler feedwater
Reversed osmosis
Ion exchangers
Ultrapure water
Drinking water

Description

Colorimetric analyzer for the determination of water hardness.

Method

The photometric determination is based on the reaction of calcium ions with an o-cresolphthalein complexone solution, which yields a violet colored complex. The intensity of the color is proportional to the calcium concentration in the sample. The absorbance of the complex is measured at 572 nm.

Reagents

Standard solutions

Features

Range (Ø 26 mm)	500 ppb
Range (Ø 16 mm)	1000 ppb
Wavelength	572 nm
Number of reagents	2
Min. analysis time	6 minutes

Technical Specifications

Model	3S-CL
Sampling Mode	Batch, with freely settable frequency.
Sample	Pressure: Atmospheric Temperature: 5 ‐ 45°C (41 ‐ 113°F) Flow Rate: 80 to 500 mL/min Connection: 6 mm (¼-in.)
Drain	Pressure-free drain Connection: 12 mm (½-in.)
Input Streams	2
Material	Epoxy-coated stainless steel AISI 304
Dimensions (H x W x D)	604 x 380 x 210 mm (23.6 x 14.8 x 8.2 in)
Weight	20 kg (44 lbs)
Power Supply	Input Voltage: 115 VAC,230 VAC,24 VDC Power consumption: max. 80 W
Output signals	2 x 4-20 mA analog outputs Modbus via RS485,Ethernet
Alarms	2 SPDT programmable voltage-free relays
Digital Input	None, Online, Start Extra, Skip Idle, Emergency Stop
Ambient Temperature	5 - 45 °C (41 - 113 °F)
Ambient Humidity	10 - 90 % RH (non-condensing)
Protection Grade	IP54 (indoor only, outdoor use possible with external cabinet, not included)