Environmental Analysis 37 All of our articles are online! To view and download them, visit:
www.envirotech-online.com New Series of High Performance Pressure Sensors
Omega Engineering (UK) manufactures a wide range of pressure measurement devices from printed circuit board (PCB) mounted pressure sensors to high temperature & pressure sensors. The new PXM309 series pressure transducer is the latest to be introduced into the Omega pressure sensor range.
The PXM309 series is a high performance industrial pressure sensor, suitable for most hydraulic and pneumatic systems, with a fast 1 millisecond response time.
The wetted parts are fully welded stainless steel for good compatibility with industrial fluids or gases. The process connection is a G1/4A (1/4”BSPP male) stainless steel fitting. There are three electrical terminations: 2 metre flying lead, mini DIN or M12 connectors. The electrical outputs available are either 0-10 Vdc or 4-20 mA, suitable for most PLC and control applications. There are 25 Pressure ranges available from 0-70 mbar up to 0-700 bar.
The complete range is available ex-stock for next day delivery and is supplied with a 5 point
traceable calibration, produced in our factory during final inspection. All the PXM309 series are RoHS compliant and meet the current CE regulations.
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New Digital Differential Pressure Sensors with Low Power Consumption
Sensirion (Switzerland) recently launched new differential pressure sensors in the SDP600 series. The new SDP6x6 sensor line features especially low energy consumption, making it suitable for long-term battery operation. The SDP606 and SDP616 sensors are designed to enter sleep mode after performing each measurement. They wake up when a “measure” command is received and enter sleep mode again after completing the measurement. The operation currents of a standard SDP600 sensor can be high as 6 mA, but the new SDP6x6 sensor is
New Range Of Automatic and Semi-Automatic Distillation Units
VELP Scientifica (Italy) launches its new range of four UDK Series Distillation Units with a choice of automation features. UDK 129 is the entry level UDK 139 is the semi-automatic solution; UDK 149 and 159 are fully automatic. Various titrator, including the Titroline Easy available from VELP, can be connected to the UDK 149, while the UDK 159 incorporates colorimetric titration, the technology recommended in the AOAC standard.
These distillation units are designed for applications such as determining ammoniacal nitrogen, protein nitrogen, (Kjeldahl or direct alkaline distillation), nitric nitrogen (after reduction), phenols, volatile fatty acids, cyanides, alcohol content and Devarda nitrogen determination.
All units have informative displays ranging from a 2-line readout for messages up to large, multi-function and colored touch screens with powerful yet easy-to-use software displayed in a convenient language.
Unlike glass condensers, the titanium condenser ensures that the distillate temperature remains below the temperature threshold whereby there is no loss of nitrogen in order to guarantee an accurate analysis. For this reason the UDK series has the most efficient performance ever!
With operator safety in mind, continuous monitoring ensures that all important operational characteristics are functioning correctly. The automatic addition of reagents depends on the model.
The UDK Series is the ideal answer to your need to produce reliable results according to standards such as AOAC, EPA, DIN and ISO while ensuring conformity to GLP.
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New Pump Easily Handles Air Sensitive, Crystallising Fluids
Fluid Metering (USA) announces their new 'Low Volume Valveless Metering Pump' for precision dispensing of air sensitive, crystal forming fluids.
FMI’s miniature “H” Series Pump Heads are now available with an isolation gland to provide a fluid barrier between the pumped process fluid and atmosphere. These pumps are ideal for maintenance-free dispensing of saline based reagents, buffers & wash fluids, slurries, abrasive fluids, fluids with particulates, inks, pigments, anaerobic fluids, dialysate used for hemodialysis, and much more.
Isolation gland pumps have a pair of extra ports which are connected to a fluid source (either liquid or gas). The fluid flowing through the gland ports provides a barrier which isolates the pumped process fluid from the seal area and atmosphere. The isolation gland is easily connected to the “barrier” liquid or gas source via barbed fittings.
FMI’s “H” Series Pump Heads can be configured with all of FMI’s drive options including AC, DC, hazardous duty, pneumatic & stepper, as well as programmable dispensing systems.
Fluid Metering, Inc. has over 50 years experience and more than 250,000 OEM Pumps in service. They provide dispensers and pumps for the most critical low flow, high precision applications.
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www.envirotech-online.com AET Annual Buyers’ Guide 2012 122
optimised for operating currents no greater than 400 µA. There is virtually no current drain (<1 µA) in sleep mode.
This drastic reduction in power consumption allows the new sensors to be used in battery powered applications. The new differential pressure sensors are excellent solutions for medical and HVAC applications, where high accuracy and reliability with very low energy consumption are required.
The new sensors extend the comprehensive product range of Sensirion’s digital differential pressure sensors in the SDP600 series. Along with the other products in this series, they offer a digital I2C output and are fully calibrated and temperature compensated. Thanks to the principle of calorimetric flow measurement, CMOSens® differential pressure sensors achieve outstanding sensitivity and accuracy even at very low pressure differences (< 10 Pa). Furthermore, they have very high long-term stability and are free from zero-point drift. Like all devices in SDP600 series, the new sensors are available in two dif-ferent versions. The SDP606 is intended for direct threaded connection to a pressure manifold with O-ring sealing, while the SDP616 is designed for tube connection.
Reader Reply Card No. 123
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