Georg Fischer 4150 Specifications

Signet 4150 Turbidimeter

The Signet 4150 Turbidimeter system provides accurate
and reliable compliant water quality monitoring for
municipal and industrial applications.

Features

• Simple and easy single unit installation with
built-in pressure regulator

• Versions compliant with either U.S. EPA 180.1
for North and South America and Asia or ISO
7027 for Europe

• Time saving and e ciencies of cuvette

technology simplifi es calibration

• Spannable 4 to 20 mA output or RS 485 output

• Two adjustable alarm relays

• Bright backlit display

• Easy access for wiring and maintenance

• Ultrasonic cleaning option ensures long and
steady on-line measurement

• Inexpensive standards allow for multiple system
calibrations

The 4150 measures turbidity via a 90 degree light which
refl ects particles as they fl ow through a small volume,
low fl ow glass cuvette. Air bubbles are eliminated
from the cuvette by adjusting the backpressure
valve on the outlet tube. The cuvette is located in a
watertight dark chamber for continuously accurate
on-line measurement. A replaceable desiccant pack
provides a dry-stable environment to ensure reliable
measurements.

Simple and fast calibration can be accomplished in under
fi ve minutes by placing the in-line glass cuvette from
the measuring chamber into the cuvette holder while
still in service and the inlet and outlet tubing remains
connected. The inexpensive calibration standard allows
for dry and multiple system calibrations without mixing
chemicals. After calibration, the unit is up and running
with simple re-insertion of the glass cuvette back into
the measuring chamber.

Additional features include a message indicator when
the desiccant needs replacing and as an option, auto/
ultrasonic cleaning of the glass in-line cuvette for longer
runs between maintenance.

The 4150 is available in two measuring ranges. The 0 to
100 NTU/FNU version is for low range applications such
as drinking water. The 0 to 1000 NTU/FNU range can be
used for various applications including raw water and
wastewater reclamation.

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Applications

• Monitor Filter Performance

• Raw or Filtered Water

• Municipal Water Distribution

• Wastewater Reclamation and Tertiary E uent

• Aquatic Life Support

Specifi cations

General
Flow Rate Range 0.1 L/min to 1 L/min (0.026 GPM to 0.26 GPM)

Measurement Range 0 to 100.0 NTU/FNU or 0 to 1000.0 NTU/FNU
Accuracy ±2% of reading or ±0.02 NTU/FNU below 40 NTU/FNU whichever is greater

±5% of reading above 40 NTU/FNU

NTU = FNU = FTU

Mounting

Horizontal plane, integral mounting bracket (with standard hole pattern)
Use 8 mm (5/16”) OD, 5 mm (3/16”) ID fl exible tubing for the water supply/outlet (customer supplied)

Resolution

up to 0.0001 NTU/FNU (below 10 NTU/FNU)

Display

Two-Line LCD w/backlight

Alarm Relays

120-240 VAC, 2A Form C Relay

Analog Signal w/Field Selectable Range

Active 4-20 mA, 600 Ω or RS485

Wetted Materials

Tubing Vinyl
Measuring Cuvette Borosilicate Glass
Glass Washer Seal Silicone
Pressure Regulator Polypropylene 316 stainless steel acetal
Inlet Tube 316 stainless steel

Maximum Inlet Pressure

345 kPa (50 psi) based on tubing connection provided

Pressure regulator rated up to 200 psi

50 PSI limit for tubing connector

Power Supply

100 – 240 VAC, 47 – 63 Hz, 80 VA

Insulation Rating

Double Insulated

Pollution Degree 2

Overvoltage Category II

Altitude

2000 meters (6,561 ft) maximum

Relative Humidity

Maximum 95% RH non-condensing

Enclosure Rating

Power Supply Box NEMA 4X / IP66

Operating Temperature/Pressure

1 °C to 50 °C 34 °F to 122 °F

(5 to 15 psig) 35 to 104 kPa

Environmental Conditions

Not recommended for outdoor use

Shipping Weight

2.5 kg 5.5 lb

Standards and Approvals

CE, FCC
RoHS compliant, China RoHS
Compliant to U.S. EPA 180.1 for white light
Compliant to PN EN ISO 7027 for infrared light
ETL Listed UL 61010-1, cETL and CSA C22.2 No. 61010-1

www.gfsignet.com