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Sigma Hellas Ltd contact information

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Working Hours

Mon - Fri: 08:00 - 16:00 (EET)
Sat: Closed
Sun: Closed

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Water quality instrumentation

PORTABLE

D.O.Meter

Our classic field DO meter - a simple and robust instrument, designed to meet all field and laboratory requirements, combines the versatility of an easy-to-use, easy-to-read handheld unit and at the same time rugged, reliable and IP-67 waterproof, with one ultra low power digital DO probe

Instument Specifications

  • Protection : IP67
  • Technology : Digital Sensor
  • Plug and Play
  • Memory : 100 000 readings
  • Autonomy : 10 days
  • Weight : 400 g
  • Warranty : 2 years

Probe Specifications

  • Range : 0 - 20,00 mg/L - 0 - 200 % SAT
  • Accuracy : 0,1 mg/L
  • Optical Luminescence technology : No calibration, no membrane, no electrolyte, no drift,no cross
  • sensitivity with pH 1-14, CO2, H2S, SO2, reduced maintenance
  • fast response sensor
  • Real time Temperature, Salinity & pressure compensation
  • Precision in low O2 concentrations
  • ASTM International methods D 888 - 05 compliance

TURBIDITY Meter

Our classic field turbidity meter - a simple and robust instrument,
designed to meet all field and laboratory requirements, combines the versatility of an easy-to-use, easy-to-read handheld unit and at the same time rugged, reliable and IP-67 waterproof, with one ultra low power digital turbidity probe

Instument Specifications

  • Protection : IP67
  • Technology : Digital Sensor
  • Plug and Play
  • Memory : 100 000 readings
  • Autonomy : 10 days
  • Weight : 400 g
  • Warranty : 2 years

Probe Specifications

  • Range : 0 - 4000 NTU
  • Accuracy : ± 1% of the reading
  • No sampling - real turbidity value with direct measurement
  • IR Optical fiber technology : no maintenance, ISO 7027 compliance

pH/ORP/Temperature Meter

Our classic field pH/ORP/Temp meter - a simple and robust instrument,
designed to meet all field and laboratory requirements, combines the versatility of an easy-to-use, easy-to-read handheld unit and at the same time rugged, reliable and IP-67 waterproof, with one ultra low power digital pH/ORP probe

Instument Specifications

  • Protection : IP67
  • Technology : Digital Sensor
  • Plug and Play
  • Memory : 100 000 readings
  • Autonomy : 10 days
  • Weight : 400 g
  • Warranty : 2 years

Probe Specifications

  • Range :
    pH : 0,00 - 14,00
    ORP : -1 000 mV - + 1 000 mV
  • Accuracy :
    pH : 0,01
    ORP : -1 mV
  • Plasticized electrolyte technology : high quality sensor
  • Temperature compensation
  • pH/ORP cartridge : Cost effective

Conductivity/Salinity Temperature Meter

Our classic field conductivity meter - a simple and robust instrument,
designed to meet all field and laboratory requirements, combines the versatility of an easy-to-use, easy-to-read handheld unit and at the same time rugged, reliable and IP-67 waterproof, with one ultra low power digital conductivity probe

Instument Specifications

  • Protection : IP67
  • Technology : Digital Sensor
  • Plug and Play
  • Memory : 100 000 readings
  • Autonomy : 10 days
  • Weight : 400 g
  • Warranty : 2 years

Probe Specifications

  • Range : 0-200,0 μS/cm 0 –2000 μS/cm 0,00 –20,00 mS/cm0,0 –200,0 mS/cm
  • Accuracy : 1 µS/cm
  • C4E technology : high precision, reduced maintenance
  • Robust field probe

Multi-Parameter Meter

if your application requires measuring/logging simultaneously parameters from 2 probes you can use the Dual channel multi-parameter Digital Handheld Instrumentation that can take any two of the ultra low power pH/ORP/T, DO, Conductivity or Turbidity probes.

- This is a simple and robust instrument, with a big display, designed to meet all field and laboratory requirements, combines the versatility of an easy-to-use, easy-to-read handheld unit and at the same time rugged, reliable and IP-67 waterproof, with two ultra low power digital probes.

Instument Specifications

  • Protection : IP67
  • Technology : Digital Sensors
  • Plug and Play
  • Memory : 100 000 data
  • Autonomy : 2000 hours with standard batteries (in economic mode)
  • Weight : 400 g
  • Warranty : 2 years

Accessories/Options

  • Standard solutions (125 mL) :
    pH : 4,01-7,01-10,01 ORP : 240 mV
    Conductivity : 84 μS/cm, 1413 μS/cm et 12 880 μS/cm / Turbidity : Formazine
  • Cable lengths : 7 m / 15 m (other on demand)
  • Carrying case
  • Software
  • 12 V external power supply cable

Chlorine
Chlorine is used extensively as a disinfectant and oxidant for the purification of water in swimming pools and cooling towers. Some typical measurement applications include:

Drinking water distribution systems
wastewater treatment
Recycling of water in cooling towers
Disinfection of water in pools
Processes in beverage and food production

In all cases, whether control is automatic or not, chlorine supply is regulated by measuring the residual chlorine after a fixed time from the time of supply.

Sigma Hellas in addition to various water quality control systems has also available for this purpose the automatic system for residual chlorine monitoring 95CL with applications in water and industry.

Model 95CL Residual Chlorine Monitoring System
(without reagents, temperature and pH compensated)

Reagent-free Measurement.
This microprocessor-based measurement system uses a unique combination of pH, temperature, and chlorine sensor inputs to produce highly accurate, reliable measure-ments - without using costly reagents - in applications where the process does not exceed 8.5 pH.

Temperature and pH Correction.
This system automatically compensates for the influences of temperature and pH, providing highly accurate chlorine measurements.

Multiple Measurement Readings/Outputs.
The analyzer displays readings for:

Free residual chlorine
Hypochlorous acid (HOCl)
pH
Temperature
Four 4-20 mA outputs can be independently set up to track any of these measured parameters.

Replaceable Chlorine Sensor Membrane Cap.
The chlorine sensor has a unique membrane cap to ensure repeatable measurements and simplify maintenance.

Pre-plumbed Sampling Assembly.
The pre-plumbed sampling assembly, housed in a NEMA 4X enclosure along with a built-in flowmeter and adjustable flow rate control, greatly simplifies installation and operation.

Software Security Access.
Built-in passcode access, when enabled, prevents unauthorized alteration of stored values while allowing an operator to recall any setup value.

Dedicated Relay Control.
Four solid-state relays provide dedicated control and alarm functions for free residual chlorine and pH. Adjustable relay setpoints and deadbands, and selectable operating modes that respond to increasing or decreasing reading provide configuration versatility to meet your application requirements.

Add-on Accessory for High pH Applications.
A special pH buffering system is available for applications where the process exceeds 8.5 pH. The buffering system has a flow-thru housing assembly and solid buffer cartridge which eliminates the need for pumps, valves, and tubing that liquid-type buffering systems require.

SPECIAL MESH TO WARN PROTECT & DETECT YOUR PIPES (AND OTHER SERVICES)

Type 050:- High strength rot resistant coloured plastic mesh manufactured from high strength coloured homopolymer polypropylene plastic mesh, incorporating up to two stainless steel tracer wires in sinusoidal form for detection purposes and overprinted on one side in black with a warning text. Mesh manufactured to EN 12613: 2009
Minimum 0.5mm diameter stainless steel 304 grade wires Tensile Strength 150kg per 200mm width
Elongation at break 12% Supplied bagged for protection
Side flanges available on request.

Width 100/200/300/400mm
Length 100~250m per roll (other lengths on request)

To make a continuous signal along the mesh it is important to use our wire crimps and crimping tool. This gives a join with sufficient strength to cope with most back fills. If it is not installed correctly the signal may pass from join to join.

CRIMPING TOOL - Y0133202
STAINLESS STEEL WIRE CRIMPS - Y0100001 (Packs of 100)

VARIATIONS OF TEXTS & COLOURS ARE ALSO AVAILABLE FOR OTHER SERVICES i.e.

Underground Utilities Detection Mesh Manufactured in Compliance to EN 12613: 2009

SIGMA Underground warning tape

SIGMA's Underground warning tape is a coloured polyethylene underground marker tape with a printed warning message for marking underground buried services (electric cables, fiber optic cables, water pipes, gas pipelines). Sigma's underground warning marker tape is an economical way of warning excavators of buried pipes and cables below ground. Sigma's underground warning tapes can be manufactured with any text, in any language, any colour and size manufactured to your specification.

• Premium 100 microns and Economy 50micron grades available
Material – Linear low density polyethylene
• Lead free pigments with virgin grade film
• Soil tolerance from pH 2.5 to pH 11.0 inclusive
• 100 micron grade is manufactured in accordance with ENATS 12-23 specification
• Special manufacture available
• Various thickness of material available from 23micron to 150micron

We also supply marker plates, marker posts and identification blocks to identify buried cables, fire hydrants and water valves etc.

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