Product Digest
This month's topic Instrumentation
Humidity Transmitter Withstands Harsh Environments
The Model AHT-200 absolute humidity transmitter uses thermal conductivity sensors to measure moisture content at elevated temperatures up to 200°C. It is said to outperform conventional capacitive/resistance humidity sensors in harsh environments, and it can recover from exposure to deposits and condensation. Its range is 0–130 g/m3 with an accuracy of ±3 g/m3, which corresponds to ±2.3% RH at 35 g/m3 at 60°C.
Appeared In Issue: June 2005
Ohmic Instruments Co.
www.ohmicinstruments.com
Improved Flowmeter Offers Enhanced Capabilities
The CoolPoint vortex-shedding flowmeter for measuring and monitoring water flows in chemical processing applications now includes a totalizing capability and a scaled pulse output as a standard selectable option, which increases the meter’s abiliity to monitor and control the total amount of water used in a process. Accuracy has been improved to ±2% of actual flow, and repeatability remains at ±1% of actual flow.
Appeared In Issue: June 2005
Universal Flow Monitors, Inc.
www.flowmeters.com
Wireless Output Devices Allow Remote Monitoring
Complementing a line of integrated wireless field units, these analog, digital and analog/digital output modules enable processors to remotely monitor equipment and process conditions with no field wiring. They allow the integration of wireless monitoring instrumentation into existing control systems for a variety of applications. The analog modules provide four 4–20-mA analog outputs, the digital modules provide eight switch-closure outputs that report the conditions of the input switches and the status of the field units, and the analog/digital modules combine the capabilities of both. Typical installed costs are said to be 90% less than those of conventional wired devices.
Appeared In Issue: June 2005
Accutech
www.accutechinstruments.com
Snubbers Provide Affordable Choke-Valve Protection
Available in brass or stainless steel, these adjustable choke-valve snubbers protect pressure gages from pressure surges and fluid hammering, and help prevent needle pointers from jumping. A fine thread adjustment allows users to tune out harmful harmonic vibration. They are offered with 1/4-, 3/8-, and 1/2-in. NPT connections with pressure capabilities of 3,000–10,000 psi, depending on the size and material.
Appeared In Issue: June 2005
Differential Pressure Plus, Inc.
www.differentialpressure.com
Combustion Analyzer Combines In Situ and Extractive Sensors
FireView is a hybrid analyzer that combines in situ and extractive sensors to generate the complete oxygen, carbon monoxide and nitrous oxides profile essential for optimizing combustion in fossil-fuel-fired boilers, furnaces, reformers and process heaters. Unlike conventional analyzers, it uses a hightemperature probe to directly measure O2 and temperature in the combustion chamber, which also serves as a sample port for extractive CO and NOx analysis. By measuring in the firebox, the FireView allows users to react quickly to changes in the process and pinpoint problem areas for maximum combustion efficiency and environmental permit compliance.
Appeared In Issue: June 2005
Marathon Sensors Inc.
www.marathonsensors.com
Gas Chromatograh Measures Low Levels of Sulfur
The S-PRO 3200 series of turn-key gas chromatography (GC) systems are pulsed flame photometric detector (PFPD)-based units that provide parts-per-billion sulfur analysis of both gaseous and liquefied petroleum gas samples. They can generate their own sulfur standards using an integrated permeation tube oven, which provides stable, NIST-traceable, multiple low-level sulfur standards for calibration or quality- control check samples. This eliminates the costs and errors common with sulfur standards in gas cylinders.
Appeared In Issue: June 2005
OI Analytical
www.oico.com
HPLC Column Quantifies Lower Concentrations
Hypersil GOLD high-pressure liquid chromatography (HPLC) columns now come in a new 1.9-μm particle size model, in addition to the 3-, 5- and 8-μm columns already available. The smaller particle size allows higher separation efficiency and improved peak capacity, enabling the accurate detection and quantification of lower concentrations of analytes. Dimensions are optimized for high-throughput analysis, and include 20-, 30- and 50-mm lengths and 2.1 to 4.6 mm i.d., as well as 10- and 20-mm Javelin columns.
Appeared In Issue: June 2005
Thermo Electron Corp.
www.thermo.com