9 DoF Inertial Measurement Unit

Silicon Sensing Systems Ltd (Plymouth, UK) is launching a new 9 degrees of freedom (DoF) inertial measurement unit (IMU) that extends the performance of its predecessor, the DMU30, while delivering a reduction in volume, weight, and power consumption. At 50 × 50 × 50 mm, and weighing 200 g, the DMU41 represents a 54% reduction in volume and a 42% reduction in weight over the DMU30. In addition, it has a power consumption 50% lower than DMU30’s typical usage.

DMU41 is an all-silicon MEMS IMU, which combines excellent angle random walk and bias stability with exceptional low noise characteristics. The unit contains three inductive and three piezoelectric resonating ring gyroscopes with six capacitive accelerometers, along with 3 magnetometers. Data can be provided at variable output rates up to 2kHz. Outputs can combine angular rate, acceleration, delta angle, and delta velocity, temperature, and built-in test results.

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High-Precision, Low-Profile Medical Sensors

TDK Corporation (Tokyo, Japan) presents a new range of highly accurate differential pressure sensors (part number B58621V), designed as printed circuit boards. The sensors are designed for measurement ranges of 16 mbar full-scale (FS), 100 mbar FS and 7 bar FS, with absolute accuracy of up to ±1 percent FS at temperatures from -20 °C to +70 °C.

Their footprint of 24 mm × 26 mm accommodates pressure ports and inlets (allowing for simple screw fitting and easy maintenance) as well as two plug connectors for easy implementation of daisy chain systems. The integrated SPI (Serial Peripheral Interface) enables easy integration into various digital applications. The sensors are EN ISO 13485-certified for use in medical devices. Precise pressure loss measurements in the flow lines allow flow rates to be accurately calculated in ventilator equipment, and they are particularly well suited for mobile ventilators due to their extremely low profile of only 6 mm. The sensors are also suitable for monitoring filters and gas admixtures.

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Signal Conditioner for Digital or Analog Communications

The NewTek Sensor Solutions (Penn-sauken, NJ) NTC-6000 Qwik-Calo LVDT Signal Conditioner completes the measurement system for AC-operated LVDTs by providing the excitation and digital output required by many of today’s laboratory, industrial automation, and process control applications. Without internal electronics, AC-LVDTs can operate in extreme environments but require the NTC-6000 Signal Conditioner to convert position feedback into readable output for use by computers, PLCs, data acquisition systems, and data loggers.

The conditioner offers a variety of selectable excitation frequencies, analog output types (0 – 10V, 0 – 5V, 0.5 – 4.5V, +5V, +10V, 4 – 20mA) as well as digital communications to a host computer via an RS-485 output. The RS-485 port also supports the hot swapability of sensors by saving set-up parameters, and automatic excitation synchronization for multiple unit systems.

Features include front panel null indicators and pushbuttons to set zero and full-scale output positions along with automatic excitation synchronization for multiple unit systems.

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Graphene-based Hall Effect Sensor for Mapping of Battery Cells

The graphene GHS01AT Hall Effect sensor from Paragraf (Cambridge, UK) is optimized for use in relatively low field environments and normal ambient temperatures. It brings magnetic field measurement resolution towards that of more complex magnetic sensors; yet with the small size and ease of use of a Hall sensor, it can address monitoring tasks for which conventional technologies cannot provide an effective solution.

It will be of value in battery cell analysis when investigating the validity of different battery cell chemistry derivatives and form factors under development. It can provide detailed real-time current density (local cell internal resistance) mapping — with any variations at different locations in the cell being detected during repeated charge/discharge cycles. If hotspots arise, the local mapping of internal cell resistance in these areas could provide insights into the physical processes occurring in the lead-up to their formation.

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Transportation Data Logger With GPS, Shock, and Climate Recording

Saelig Company, Inc. (Fairport, NY) has introduced the MSR 175plus Data Logger, which contains two 3-axis-acceleration sensors (±15 g/±200 g), a temperature sensor (-20 to +65 °C), a humidity sensor (0 to 100% rel. humidity), air pressure sensing (0 to 2000 mbar), and an ambient light sensor (0 to 65,000 lux). The tamper-proof data logger records potentially damaging shock events as well as the associated ambient conditions with the exact geographical position via its GPS/GNSS receiver.

The two 3-axis-acceleration sensors measure at a rate of up to 6400 times per second. In addition, the robust mini data logger measures and stores temperature curves, humidity, air pressure, and light. It will store 2 million data values and even with active GPS tracking, the removable, rechargeable 2400 mAh LiPo-battery enables recording for up to 8 weeks, and at least one year without GPS tracking.

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In-Vehicle Prototyping System

dSPACE (Wixom, MI) offers its MicroAutoBox III in-vehicle prototyping system with a high number of channels and an extended range of bus and network interfaces. With the addition of the new DS1521 I/O board variant, the system is particularly suitable for communication-intensive developments that take into account the centralization of the E/E architecture, among other things.

Typical applications include intelligent gateways, running supervisory controllers to control other ECUs in real time via buses and networks, and designing central control units with service-based Ethernet communication. To ideally address these applications, the DS1521 Bus and Network Board provides eight CAN FD channels, three automotive Ethernet ports (100/1000BASE-T1), two FlexRay connectors (A/B), three LIN channels, and additional UART, digital, and analog interfaces. For particularly communication-intensive applications, the MicroAutoBox III can also be equipped with two DS1521 boards, which results in doubling the number of interfaces.

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Measuring Transformer Terminal Block

Weidmuller’s (Richmond, VA) TTB measuring transformer terminal block series is a systematic offering of modular terminals that meet all the connection requirements of critical transformer (current/voltage) protection and measurement functions. The series is approved according to IEC 60947-7-1 Annex D — safety-relevant components captively connected to the modular terminal block.

The terminals have been developed for use in secondary circuits of measuring transformers. For safe application when disconnecting or isolating protection of measuring devices, the terminal short-circuits the current transformer and thus prevents high voltages from occurring in the secondary winding. After short-circuiting the current transformer (CT) side and simultaneously disconnecting the primary side, the meter can be easily and safely checked via relay test or replaced. Thanks to the patent-pending Comparative Measurement (CM) lever connection, two-terminal blocks can be selectively disconnected in order to interconnect a calibrated measuring device. After the measurement, the captive lever is reset to the original position, leaving the “close-before-open” contact active. The switching state of the TTB series instrument transformer terminals is easily visible in all lighting conditions based on color-coding. The disconnect lever can be operated by hand or with a standard screwdriver. It also facilitates the realization of multi-pole actuations.

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Smart Transmitter with Bluetooth

The iTEMP TMT142B from Endress+Hauser (Premstaetten, Austria), new generation smart temperature transmitter with Bluetooth delivers measurements using wireless communication via Bluetooth. It’s packaged in a robust single-chamber field housing. The technology offers significant improvements in process efficiency and plant availability while reducing costs.

The transmitter features a highly secure integrated Bluetooth interface that enables users to wirelessly visualize measured values and NAMUR NE 017 diagnostic information, as well as to perform configuration tasks. The device can be operated using your phone or tablet and the Endress+Hauser SmartBlue app. No special tools required. Access to the device is password-protected, and provisions for Bluetooth communication complies with the highest standards.

The configurable single-channel device transmits converted signals from resistance sensors (RTD), thermocouples (TC), resistances (Ω), and voltage transmitters (mV) via the 4 to 20 mA signal or HART 7 communication.

The transmitter is designed for safe operation in hazardous areas as certified by international approvals (ATEX, CSA C/US, IECEx).

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Interactive Surge Protective Device (SPD) Sizing Selection Guide

Littelfuse, Inc. (Chicago, IL) announced today the launch of a surge protective device (SPD) selection guide that sizes SPDs to achieve the best level of protection for a system based on specifications provided.

Surge protective devices need to be sized correctly. If they are sized too low, the system could be susceptible to temporary overvoltages as well as cause a decrease in the life expectancy of the SPD. If they are sized too high, it could damage the equipment.

The selection guide offers customers an interactive calculator that quickly provides the right SPD size to maximize surge protection for their systems. When specifications are entered, the guide computes the best configuration based on the provided parameters and gives information on the recommended SPD product with links to the data sheet and other technical resources.

The guide will determine the optimal maximum continuous operating voltage (MCOV) size for your specific system from variables including:

  • Line-to-line voltage

  • Number of conductors

  • Grounded or ungrounded

  • If there is a neutral

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LVIT Subsea Position Sensors

H. G. Schaevitz LLC, Alliance Sensors (Moorestown, NJ) announces its SSx-7 series of LVIT subsea position sensors. Available in full scale ranges from as short as 1 inch (25 mm) up to 36 inches (900 mm), these devices are constructed of AISI 316 stainless steel to operate at depths of 10,000 feet (3,000 meters). The SSx-7 body style easily fits into an SAE O-ring port in the end of a hydraulic cylinder and is terminated with the popular micro-circular subsea connector. Offered with common analog voltage or current loop outputs, standard SSx-7 series position sensors are good solutions for many subsea applications like: Choke actuators in a PBOF environment; BOP sealing or shearing ram positions; annular BOP seal compression piston; ROV electric and hydraulic actuators; hydraulic cylinder position sensing.

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