Monthly Archives: December 2012

Miniature Pressure Transducer has Flush Diaphragm, Zero Dead Volume

The Series FT290 pressure transducers are designed for those applications requiring both a standard NPTmale process connection and a flush diaphragm with zero dead volume. These pressure sensors are designed with a unique diaphragm design which reduces stress levels caused by torquing a tapered thread into the mating fitting. Besides their small size (only 3.5 oz.), these pressure sensors are constructed of all welded stainless steel and can withstand demanding application environments.

The FT290 covers ranges from 2,000 to 10,000 psia/psig and provides 3mV/V full scale output with 10vdc excitation. Static accuracy is ±0.25% (BFSL). The operating temperature is -100°F to +300°F, and the compensated temperature range is from -65°F to +250°F.

Additional design features include low sensitivity to shock and vibration, and infinite resolution. The compact size of the Series FT290 pressure transducer makes it ideal for many metering and dispensing applications. Standard units are designed with 1/4” NPTM pressure fittings; optional sizes are available. Each unit is shipped with a 19 point calibration record traceable to NISTas standard.

Series AP50XX In-Line Amplifier from Stellar Technology

The Stellar Technology Series AP50XX in-line signal conditioner offers many options for those customers requiring high level output where application temperatures or physical size constraints do not allow having signal conditioning at the point of measurement. The AP50XX can be placed in-line anywhere between the transducer and the data acquisition system.

The AP50XX is available in two diameter configurations, making it easy to incorporate into a variety of applications. The Series AP50XX is all-welded and constructed of stainless steel, and is available with a variety of analog and digital outputs. Standard analog outputs are 4-20 mAcurrent loop, 0-5 Vdc, 0-10 Vdc, and 1-5 Vdc.

Isolated voltage outputs are standard for all voltage outputs. Standard digital outputs are RS232, RS485, and CANbus. Series AP50XX options include zero/span adjustment, customer-specified electrical terminations, EMI/RFI filtering, surge protection, hermetic construction, assorted mating connector/cable assemblies, mounting brackets, and intrinsic safety (for 4-20mAcurrent loop).

New DIN-Rail Amplifier for use with LVDTs

The new Series AP5104 is a convenient DIN-rail Amplifier for use with 4-, 5-, or 6-wire LVDT’s (linear variable differential transformer). The AP5104 provides regulated AC excitation with remote sensing capability for cable runs exceeding 20 feet. The AP5104 produces filtered analog outputs of ±0-5Vdc, ±0-10 Vdc, 4-20 mA, 4-12-20 mAwhich are field-selectable via the front panel.

These outputs are filtered using a low-pass active filter that removes unwanted high-frequency measurement-signal components and thus eliminates aliasing errors. Signal inputs from 16 to 1600 mV/V are accepted.

The DIN mount housing is constructed of high-impact thermoplastic and permits easy access to screw terminal connections for power, analog output, shunt, and sensor signals. All controls are external including 25-turn trim pots for Zero and span, as well as coarse gain and zero, zero input switch, jumper links for master/slave setting, and excitation frequency setting. The manual or automatic phase shift adjustment feature synchronizes primary and secondary phase shifts caused by winding inductance or cabling. The AP5104 is easy-to-use, with a power status indicator light and analog over-range indicator light.

New DIN-Rail Amplifier for use with DC Strain Gage Transducers

The new Model AP5101 is a DIN-rail mounted single channel Amplifier which provides variable excitation and signal conditioning for standard DC-excited strain gage transducers, including those for pressure, force, torque, and load. The AP5101 provides up to 10V output or 4-20 output with transducer signals from 10mV to 10V, and incorporates a DC-DC converter to insure that the output is electrically isolated from the supply. The unit accepts both uni-polar and bi-polar input signals and can produce corresponding uni-polar or bi-polar voltage outputs.

The AP5101 is compatible with standard DIN-Rail mounting systems and is constructed of high-impact thermoplastic. The design permits convenient access to screw-clamp terminal connections for power, analog output, shunt, and sensor signals. Zero and span adjustments are located on the front panel and feature 25-turn trim pots. All other controls are internal including coarse gain and zero, zero input switch, jumper links for master/slave setting, and excitation frequency setting. All internal settings are easily accessible by disengaging the front panel and board assembly from the housing. The AP5101 is easy-to-use, with a power status indicator light and over-range indicator light.

Subminiature Tension-Compression Load Cells

Stellar Technology introduces the subminiature series VLU850  tension/compression load cells. In addition to their small size – with diameters from 0.50” and heights from 0.31” – these load cells deliver exceptional 0.50% accuracy for ranges from 10 to 1,000 lbf.  Micro-Welded stainless steel construction provides for a repeatable, reliable, and rugged product.

Standard output for the Model VLU850 is 2 mV/V and electrical termination consists of a 4-conductor Teflon cable with braided stainless-steel shielding and an integral temperature and zero balance board. The VLU850 is temperature compensated from 70°to 170°F, and the temperature effect on zero and span is minimal at 0.01%/°F, insuring reliable performance. These load cells have a standard operating temperature range of -40°to 250°F, with an optional operating range from -65°to 400°F offered.

These small but rugged units feature a static overload capacity of 150% (FSO) and are perfectly suited for a variety of demanding and limited-space applications including medical robotics, components testing, biomedical research, flight control systems, structural testing, infusion pumps, and orthopedic stimulation.

Subminiature Compression Load Cells

Stellar Technology introduces the subminiature series VLC856  compression load cells. Small in size – with diameters from 0.38” and heights of only 0.13” – these load cells deliver exceptional 0.50% accuracy for ranges from 10 to 1,000 lbf.  Micro-Welded stainless steel construction provides for a much more repeatable, reliable, and rugged product.

Standard output for the Model VLC856 is 2 mV/V and electrical termination consists of a 4-conductor Teflon cable with braided stainless-steel shielding and an integral temperature and zero balance board. The VLC856 is temperature compensated from 70°to 170°F, and the temperature effect on zero and span is minimal at 0.01%/°F, insuring reliable performance. These load cells have a standard operating temperature range of -40°to 250°F, with an optional operating range from -65°to 400°F offered.

These small but rugged units feature a static overload capacity of 150% (FSO) and are perfectly suited for a variety of demanding limited-space applications including medical robotics, components testing, semiconductor polishing (CMP), tactical feedback systems, infusion pumps, and orthopedic stimulation.

Subsea Wellbore Pressure Plus Temperature Transducer

Stellar Technology’s Model PT36XX subsea wellbore pressure and temperature transducer delivers long-term performance in harsh subsea oil and gas exploration environments. It has a total error band of ±1% of full scale output and is designed for working pressures to 15,000 psi and seawater depths to 17,000 ft.  Both temperature and pressure sensors are located at the flush-end of the wellbore probe, a design feature that improves dynamic response and alleviates clogging.

This wellbore sensor includes dual pressure containment rated to 20,000 psi for increased reliability. In addition, the PT36XX is constructed with no external load-bearing welds thus increasing service life and improving field serviceability.

The PT36XX is constructed of Inconel and 316 stainless steel. It can be configured as a pressure only or temperature only unit. The standard unit incorporates a 3 1/16 inch API flange although customers can specify their flange of choice. Probe lengths are available in lengths of 3” to 24”.  Both probe lengths and electrical terminations are customer-specified. PT36XX is also available with dual redundant pressure sensors for extremely demanding applications.

Customers can select from numerous available electrical outputs; 4-20 mA, 0-5 Vdc, 0-10 Vdc, as well as digital outputs including RS232, RS485, and CANbus. The PT36XX is field proven with years of reliable use. Each wellbore transducer is shipped with a multi-point calibration record, traceable to NISTas standard. Material traceability is also available on request. Due to various configurations and customer-specified features contact the factory for pricing and delivery.

High Performance-High Value Pancake Load Cell

Stellar Technology’s  new Model PNC700 is a high performance, feature rich, general purpose tension/compression load cell which combines high accuracy (0.05% BFSL),  high off axis performance, high fatigue life, and large industry standard loading threads with a very competitive price.  The Model PNC700 comes standard with 3 mV/V output.  Optional internal or in-line amplifiers are available for those applications requiring high level analog or digital output, including CANbus.

Versatile enough to handle ranges from 100 lbf to 100,000 lbf and survive in temperatures from  -65F°up to +400°F, the PNC700 provides the ideal combination of price and performance required for applications that need a reliable, rugged, high accuracy, pancake style, tension/compression load cell. Each PNC700 load cell is designed for dependable performance in harsh environments– all welded stainless steel, O-ring seal at connector and shock and vibration protected.   Hermetic versions are also available.  To enhance overall performance, the Model PNC700 is also barometrically compensated.  The standard compensated temperature range is 70°to 170°F.

The PNC700 features a static overload capacity of 150% FSO as well as improved tolerance to off-axis loading in order to survive the most punishing applications. The PNC700 is available in tension only, tension and compression, or compression only configurations.    This high performance load cell is also available with a variety of options including metric threads, submersible configurations, dual or triple bridge designs, special full scale ranges (English or Metric) and a selection of electrical terminations and connector orientations.

Pressure Sensor Built to Survive with Field-Replaceable Diaphragm

Stellar Technology’s Model GT100 is a robust, heavy duty pressure transducer designed as a solution to severe applications like rocket engine testing that can ruin a typical pressure sensor. Model GT100 features a cleanable pressure cavity and a stainless steel diaphragm which can be replaced in the field as needed, renewing the sensor in just a few minutes.

The GT100 has a standard output of 3mV/V and delivers linearity and hysteresis of 0.25% across pressure ranges from 150 psig to 20,000 psig. Exceptional thermal isolation ensures reliable performance over an operating temperature of -100°F to +300°F. The compensated temperature range is -30°to +170°F, which can be extended to -65°to +250°F.

This rugged stainless steel sensor has built-in overpressure protection and low sensitivity to shock, vibration, and thermal influence. Wiring is through a heavy-duty 6-pin stainless steel connector, and 4 pressure fittings are offered, depending on the range.

In-Line Amplifier for DC Strain Gage Transducers

The new Series AP5201 In-Line Amplifier from Stellar Technology is a low cost, easy-to-use, general purpose signal conditioner. This single- channel unit is ideal for DC-excited strain gage pressure transducers, load cells, and torque transducers.

AP5201 features an advanced analog design which solves the problem of measurement inaccuracy caused by high electromechanical noise. The AP5201 provides filtered analog output of ±5Vdc, ±10Vdc, or 4-20 mA, which is field-selectable by the user. Zero and span adjustments are made through coarse rotary switches and potentiometers. This in-line amplifier will accommodate a wide range of full-bridge DC strain gage sensors with bridge resistance for 120 to 10K Ohm.

The AP5201 signal conditioner can be placed in-line and away from high temperature, high humidity, or corrosive environments that the transducer itself may be exposed to, thus protecting the electronics from severe conditions and ensuring reliable performance. The AP5201 in-line amp is also useful when mated to miniature and subminiature load cells or pressure transducers which are too small to accommodate internal electronics. The AP5201 signal conditioner is housed in a rugged ABS flame-retardant case, or is available in a DIN- rail configuration as the Series AP5103.