Differential electrometer
Warner Instruments, Hamden, Conn.
 The HiZ-223 dual channel differential electrometer is a high input impedance amplifier featuring two small active headstages that allow the first stage of amplification to take place at the electrode site. This amplifier is suitable for measurements using high resistance ion-selective microelectrodes. The design of the HiZ-223 specifically reduces shunt capacity and minimizes electrical interferences, such as electrostatic noise and motion artifacts. The probe housing includes a signal-driven guard that further reduces noise and stray capacity. The HiZ-223 has a probe test port that permits testing of the electrode as well as setting of the probe leakage current. A standby mode is included and should be used when attaching microelectrodes or electrode holders to the probe input. Warner Instruments makes biomedical devices for the electrophysiological, cellular, and neurological sciences.
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Oxygen meter
Omega Engineering Inc., Stamford, Conn.
 The DOH-20D is a portable, microprocessor-based dissolved oxygen meter that is easy to operate, and has the ability to obtain fast and accurate readings. The custom digital LCD screen displays large numbers for clear reading. The LCD screen can show dissolved oxygen in either mg/liter or percent of saturation and temperature simultaneously. This product has memory storage, recall with data hold function, and the ability to store up to 16 sets of temperature and dissolved oxygen values. The user can utilize the optional RS-232 feature to download stored values to a computer. The oxygen meter comes equipped with battery-saving features. The device will shut down automatically after 10 minutes of being idle and has low-battery and consumption indicators. It is useful for biological testing, wastewater treatment, fish tanks, and environmental testing within the water, wastewater, and chemical treatment industries. The DOH-20D comes complete with a sensor, two membrane caps, 20 mL of electrolyte, pipette, a rubber protective cover, 9 V battery, operator’s manual, and a one-year warranty. The price starts at $700.
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Acrylic flow meters
Dakota Instruments Inc., Orangeburg, N.Y.
ACR clear acrylic flow meters feature direct reading dual scales mounted interchangeably at the rear of the flow meter. The scales display both English and metric system units, and are mounted by means of locating holes between the rear of the acrylic block and the yellow-colored backing plate. This feature allows simple removal of the existing scales and easy mounting of additional scales for different fluids and flow rates. In addition, these versatile meters offer quick conversion from factory-set panel mounting to partial or full in-line configurations by correspondingly exchanging the plug seals and the inlet/outlet connectors. Floats are available in a choice of glass, 316 stainless steel, or Carboloy. They are constructed from an impact-resistant acrylic block and can be panel mounted by means of hex nuts. These products fit a variety of industry-specific applications, including chemical processing, pollution treatment equipment, gas analyzers, film and X-ray processing equipment, water systems, and desalinization equipment.
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Micro-switches
Microprecision Electronics, Edina, Minn.
 This Swiss-based manufacturer of custom microswitches and sealed position switches offers products that are made in the U.S. Microprecision’s switches now undergo final production at Wilbrecht Electronics’ Huron, S.D., plant under a new partnership with the company. An expanded U.S. distribution network also has been established. Willbrecht is NASA and DSCC QPL production qualified. Microprecision’s products offer a mechanical lifespan of as many as 50 million commutations. Many of the company’s solutions can save users development time, such as the design of the specific actuators or cable combinations required for certain applications. The tailor-made switches provide dependable solutions for a range of industries, including food and packaging; OEM transmission and brakes; electrical and machine tool; and heavy agricultural, road, rail, and sea transportation.
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Output modules
Automation-Direct, Cumming, Ga.
The line of DirectLogic option modules includes new fault-protected output modules designed for the DL205 PLCs. The F2-16TDxP 16-channel current output modules, available in sinking and sourcing configurations, have 16 input points that are automatically assigned as fault status indicators for the corresponding outputs. Equipped with electronic short circuit protection, the modules detect missing external 24 V dc, open load, overtemperature, and overcurrent load. The protected output modules also feature user-resettable fault conditions. These modules cost $119.
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Inflatable seal
Pawling Engineered Products, Pawling, N.Y.
The Pneuma-Seal type 10X mesa-topped inflatable seal outperforms conventional serrated-top seals in sealing effectiveness and ease of cleaning in many high-pressure, low-gap applications, according to the company. It is useful for such tasks as door seals on sterilizers, semiconductor foundry equipment, clean rooms, nuclear containment vessels, and other isolation chambers. The new seal is the result of years of testing against serrated-top seals. The large, continuous top surface is said to create a more positive barrier and withstand higher pressure differentials than conventional serrated designs. The seal comes in a white, FDA-compliant, low-outgassing silicone elastomer, designated compound 95C12. The smooth, flat top makes cleaning and washdown easier and more effective by eliminating numerous potential contamination sites in the grooves. Available standard cross-sections cover the range from 0.256 x 0.197 in. to 1.378 x 1.260 in (6.5 x 5 mm to 35 x 32 mm).
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Multistation manifolds
Clippard Instrument Laboratory Inc., Cincinnati, Ohio
Single- and multistation manifolds are now available for use with the company’s Oxygen Clean Series electronic valves. These manifolds have either single- or double-sided mounting in oxygen-compatible, electroless, nickel-plated brass material and feature 1/8-in. NPT input ports and 10-32 outlets. Oxygen Series pneumatic valves have a patented valve system that has been proved in many industries, according to the company. The valves have flexibility in design, with power consumption of 0.67 watt, a response time of 5 to 10 milliseconds, and voltages of 6, 12, or 24 V dc.
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High-torque step motor
Lin Engineering, Santa Clara, Calif.
The RoHS compliant version of the SilverPak 17D is a high-torque, two-phase, 1.8 degree NEMA 17 step motor with an integrated microstepping driver that delivers high performance in a small package, the company says. The SilverPak 17D is designed to help reduce overall design time and system cost for step motor applications needing high torque and smooth motion. It is available in three body lengths: 2.69 in., 2.92 in., and 3.24 in., and is capable of up to 85 oz.-in. of holding torque, depending on the stack size of the motor. The SilverPak 17D also features an operating voltage range from 12 to 24 V dc, phase current range from 0.25 to 2.0 amps peak, step resolutions from full stepping to 16x microstepping, optically isolated step, direction, and disable/ enable inputs, and undervoltage and overtemperature protection.
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Updated O-ring
Trelleborg Sealing Solutions, Fort Wayne, Ind.
An O-ring calculator is now available in both inch and metric versions. It includes a sizing capability, design parameter recommendations, and complete measurements. Results and comments may be printed, saved online, or filed as a PDF. Features of the O-ring calculator also include sizing capability, design parameter recommendations, complete measurements, recommendations for a range of materials including perfluoroelastomers, and warning messages when there are input errors or deviations from design recommendations.
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Integrated injector
Valco Instruments Co. Inc.,Houston, Texas
The Cheminert C52 Series injector is the company’s first integrated motor/valve assembly designed specifically to be built into an OEM system. Using the Cheminert HPLC injector design and the 24 V motor from its microelectric actuators, Valco’s C52 needs only to be connected to the instrument’s power supply. Control is simplified to require a single contact closure; the injector’s position is determined by whether the closure is held high or low. The instrument can confirm the valve’s position by sensing the output from a built-in sensor. All these features are built into a compact and lightweight package, available in 4-, 6-, 8-, and 10-port configurations, stainless or PEEK. The C52 can simplify instrument designs, trim costs, and minimize time to market, according to the company.
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Accelerator calibration
The Modal Shop Inc., Cincinnati, Ohio
The Model 9155D accelerometer calibration workstation covers a range of accelerometer calibration needs. ICP, charge, shock, piezoresistive, capacitive, velocity, high-frequency, and low-frequency vibration sensors can all be calibrated for sensitivity and phase, verified for linearity or resonance checked with the many options available for the system. Calibrations are performed using the “back-to-back” method according to ISO 16063-21. Customizable data reports are generated within Microsoft Excel that conform to the requirements of ISO 17025 for calibration certificates aiding customers who require A2LA certification. A state-of-the-art air-bearing shaker, with expanded frequency range to 20 kHz, is available for users who want ultra-low transverse motion not available with traditional flexure-based calibration shakers, as well as ease of use not usually associated with air-bearing shakers.
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Linear guide systems
Pacific Bearing Co., Rockford, Ill.
Integral V Technology is a line of cost-effective, easy-to-specify linear guide systems. This process allows for tighter tolerances without additional cost. The design itself is capable of carrying heavy loads at expanded capacity, velocity, and acceleration while still having strong wear resistance. Products in Integral V Technology include snap-in, bolt-on, integrated, and compact configurations. The hardened steel V-raceway allows for a high load capacity and rigidity. The rail is constructed of lightweight aluminum that works with the V-raceways, thereby lowering production and replacement costs, according to the company.
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Piezo stage controller
Physik Instrumente L.P., Auburn, Mass.
The E-712 digital piezo stage controller was designed for the requirements of multi-axis piezo nanopositioning systems. Its modular design allows flexible configuration, easy upgradeability, and adaptation to changing requirements in any scanning or positioning application, according to the company. Due to its high-performance processor and real-time operating system, the controller can precisely control the trajectory of up to six axes even during high-velocity motion on a millisecond time scale. Proprietary linearization algorithms deal with the nonlinear nature of PZT actuator material and can greatly reduce motion errors. The high position sensor sampling rate of 50 kHz provides plenty of margin for ultra-fast piezo stages with sub-millisecond response times.
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