56 WATER / WASTEWATER
Chemical oxygen demand (COD) reagent vials for measuring water quality
CHEMetrics® offers two methods (USEPA-accepted and mercury-free) for the determination of COD levels in wastewater—at a much lower cost than competitive vials.
Measuring chemical oxygen demand (COD) is one of the most frequently performed tests for assessing water quality. It is widely applied in municipal wastewater facilities and industrial wastewater treatment plants to determine the degree of water contamination and to evaluate the effi ciency of treatment processes.
Products using the USEPA-accepted method contain mercuric sulfate in the reagent to eliminate chloride interferences. A more readily disposable, mercury-free product line is also available for applications in which chloride interference is not a concern and USEPA reporting is not required.
Available in standard 25 and 150-count eco-friendly packaging, CHEMetrics COD Reagent Vials can be used with CHEMetrics photometers, and any spectrophotometer that accepts a 16 mm cell, including Hach instruments using their factory-programmed calibrations. A generic calibration equation is included for use with other spectrophotometers. Calibration standards to verify the accuracy of test results or to generate calibrations are available as well.
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Myron L®
54770pr@reply-direct.com
Optical multi-analyte meter with a sting in its tail
Controller combines accuracy,
Company’s new 900 Series Multi-Parameter Monitor/ reliability, simplicity, and fl exibility.
It’s the ideal instrument for even the most demanding water treatment applications.
Measurement capabilities include: Conductivity, Resistivity, TDS, Salinity, pH, ORP, Temperature, mV input, Flow/Pulse, a multi- parameter 4-20/0-20 mA input, and % rejection. Standard outputs include a 0-10 VDC recorder output, a relay output, and a remote alarm output. Optional outputs include 4-20/0-20 mA, RS-485, two additional Relays and one additional remote alarm.
The instrument’s display can show up to 4 measurements simultaneously. Sensor setup allows the user to eliminate error due to cable length and enter custom cell constants for conductivity sensors. Its 3.5” touchscreen and intuitive GUI make it simple to setup, simple to use and simple to adapt to your specifi c needs.
The Myron L® Company 900: A high level performer for applications where high-level performance is an
absolute requirement. More information online:
ilmt.co/PL/3doj
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The compact FireSting-PRO is a unique one-device solution for multiple analytes and sensor heads. It is a PC-controlled (USB) fi bre-optic multi- analyte meter, which can be combined with the complete sensor portfolio for optical O2
, pH, and temperature sensors from PyroScience.
Each of the 4 optical channels is freely confi gurable for several analytes and sensor types. These range from microsensors (50 µm tip) to robust probes (3 mm tip) and include diverse smart contactless sensor solutions (for measurements in closed systems / respirometry, microfl uidics and complex geometries), as well as sensors for different ranges (full and trace range O2
, pH ranges). A precision Pt100 temperature sensor can be connected to the temperature port, enabling automatic zero noise and zero latency temperature compensation of the optical sensor measurements in samples with varying temperatures, even during high speed measurements.
The FireSting-PRO features improved ambient light suppression for applications at in situ light conditions, as well as smart measurement modes for a prolonged sensor lifetime. Several FireSting-PRO devices can be simply operated with a single PC in a single Pyro Workbench window, offering scalable fi bre-optic multi- parameter sensor systems with e.g. 8, 16, 32, or 64 channels. It has never been easier to measure important parameters in a single sample at high precision with maximum fl exibility concerning analyte, sensor format, measuring mode, and application range. These devices are also available as 1-channel and 2-channel version.
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IET SEPTEMBER/OCTOBER 2021
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