Inductive Proximity Sensors with Analog Output

Automation Direct (Cumming, GA) announces the availability of UL approved DW Series round metal inductive proximity sensors with analog outputs in 8mm, 12mm, 18mm, and 30mm cylindrical sizes. These reliable DC-powered (10 – 30V or 15 – 30V) threaded-barrel sensors are IP67 rated and are available with 2m pigtail cable or quick-disconnect.

8mm analog inductive proximity sensors detect the presence of ferrous metal objects at distances from 0 to 4mm and provide a variable output (0 – 5 VDC or 0 – 10 VDC). 12mm, 18mm, and 30mm analog inductive proximity sensors detect the distance of ferrous metal objects from 0 to 6mm, 0 to 10mm, and 0 to 20mm respectively, providing a variable mA or voltage output (0 – 5 VDC / 1 – 5 mA and 0 – 10 VDC / 4 – 20 mA) linear to distance signal. Rectangular 8mm × 8mm analog output sensors are also available with 0 to 4mm sensing range.

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Ultrasonic Weather Multisensors

Airmar® Technology Corporation (Milford, NH) is releasing their new 110WXS and 150WXS Weatherstation® Multisensor instruments, designed for real-time, site-specific weather information.

Built upon the proven high performance of Airmar’s preceding Weatherstation products, the 150WXS ensures accurate measurement of seven critical weather parameters including ultrasonic measurement of true and apparent wind speed and direction, barometric pressure, air temperature, calculated wind chill, and relative humidity with dew point and heat index. With a built-in GPS and 2-Axis compass, the 150WXS provides heading and time stamping functionality, making it perfect for remote mounting of a network of stationary or deployable sensors. The 110WXS offers the same features as the 150WXS with the exception of relative humidity, GPS, and compass.

Both instruments’ UV and solar radiation-stabilized housings are rugged, compact, and rated to IPX4 ingress protection with CE, RoHS, and IEC60945 product certifications. They are ideal as stand-alone instruments or can easily be integrated into systems designed for weather monitoring over larger geographic areas.

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Glass-Free ISFET pH Sensors

Endress+Hauser (Greenwood, IN) has launched Memosens CPS47D, CPS77D, and CPS97D ISFET pH sensors for applications where glass pH sensors present a risk of breaking. They are made of unbreakable PEEK and are available with three different reference systems.

The CPS47D and CPS77D sensors are designed for hygienic applications. They deliver stable and reproducible measured values, even after sterilization and autoclaving up to temperatures of 275 °F (135 °C); come with the usual hygienic approvals for the food and life sciences industries, such as USP, EHEDG, and 3A; and are TSE/BSE-free. In addition, the CPS77D offers maximum bacteria tightness because of its microporous ceramic diaphragm.

The CPS97D has a fast response time and is chemically stable thanks to its PEEK stem. Also, its open diaphragm does not become clogged in the case of high solids concentrations. The sensors store calibration, sensor, and process data.

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Relative Pressure Sensor IC for EVAP Systems in ICE and Hybrid Vehicles

Melexis (Tessenderlo, Belgium) announces the MLX90821 relative pressure sensor IC designed for measuring very low pressures in automotive applications. Using the latest MEMS technology closely integrated with an analog signal chain and digital signal processing, it is a system-in-package IC solution for the reliable measurement of fuel vapor pressure as low as 50 mbar and up to 700 mbar. This makes it suitable for EVAP systems designed for internal combustion engine or hybrid vehicles.

Implementing fuel pressure vapor detection using so-called EVAP (evaporation) systems is increasingly important for automotive manufacturers, as more regions introduce strict legislation that prohibits the venting of fuel vapor to the atmosphere. As vapor builds up inside fuel tanks and crankcases, the EVAP systems are designed to capture, store, and responsibly dispose of the vapor, preventing it from escaping into the air. Pressure sensors that can operate at very low pressures, like the MLX90821, are a crucial part of these systems, as they are able to detect even the smallest leaks that can potentially appear at any point in the EVAP system.

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Handling of Multi-Port, Low-Pressure MEMS Sensors

Boston Semi Equipment (Billerica, MA) announced that it has enhanced its Zeus gravity feed handlers with the capability of handling extremely low-pressure MEMS devices with multiple ports. The Zeus MEMS handler is faster, more economical, and requires significantly less floor space than their existing solution. Automotive, medical, industrial and consumer markets will benefit from the efficiencies and lower cost of test by handling pressure MEMS ICs in BSE’s Zeus handler.

The Zeus pressure MEMS stimuli include 0 to 18 inches of H2O, 0 – 3 psia vacuum, and up to 150 psi. A 70-bar stimulus is in development. The Zeus is a tri-temperature handler that can be configured with up to eight test sites. Cold temperature testing is achieved using LN2 or a BSE-designed, two-stage chiller, the MR2.

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Smart Helicopter Load Sensor

The Sensor Technology HeliNav-LoadMaster — an intelligent load sensor designed for use in weight-lifting workhorse helicopters has been introduced by Saelig Company, Inc. (Fairport, NY). This sensing system simply incorporates a strain gauge into the underslung cargo load hook. Inclinometers have been added so that it can be used with three-point fixing for large loads; a new receiver wirelessly collects live load data for analysis, interpretation, and reporting, and a new touch-sense display gives real-time information on operational variables to aid calculation of flight and operational profiles. The Load Sensor works in the license-free 2.4GHz band using dual antennas and advanced error-correcting technologies to send and receive data error-free. Data is transmitted to a compatible cockpit-mounted full-color touch display. Data can also be stored internally. Its built-in 32Mb memory can hold up to 280 hours of data, which can then be downloaded to a PC via a USB cable. The sensor is available in ranges from 1.5 to 10 tons.

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Efficiency-Testing Dynamometer Systems for Environmental Standards

SAKOR Technologies Inc. (Owosso, MI) has developed a series of dynamometer systems ideal for customers required to test and verify the level of efficiency of electric motors in accordance with a variety of national and international standards, including IEC 60034-2-1; IEEE 112B; and Canadian standard C390-93. The SAKOR units can be used for testing from two to eight-pole motors ranging from 10 watts to more than 3 megawatts.

The new line of SAKOR motor testing dynamometers offers high-accuracy testing for designers and manufacturers of electric motors of any size, for use in applications ranging from large industrial equipment to consumer appliances, including fans, refrigerators, and washing machines. They have been optimized so that individual machines can test the widest possible range of motor sizes and still maintain necessary accuracy tolerances. These systems meet the standards’ tight tolerances and exacting requirements regarding data precision and accuracy.

Capable of precisely measuring motor efficiency, these dynamometers provide an essential tool to engineers seeking to reduce fossil fuel consumption and enhance energy efficiency to meet strict environmental standards and regulations.

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Integrated Differential Pressure (DP) Flow Meter Solution

A new integrated differential pressure (DP) flow meter solution — the Rosemount 9295 Process Flow Meter — has been introduced by Emerson Automation Solutions (Round Rock, TX).

Design and purchasing consists of specifying and buying one assembly — instead of specifying up to 15 individual components, creating a custom design and assembling these components. Installation is simplified, as most field welding, cutting, and fabrication tasks are not required because all components are fully assembled and leak checked.

The 9925 eliminates the common DP flow meter requirement for up to 44 pipe diameters of straight run upstream and six diameters downstream of the meter by including Emerson’s patented conditioning orifice technology in the assembly.

  • All-welded design meets piping requirements for hydrocarbon applications and reduces potential leak points.

  • Impulse lines allow removal of impulse line blockages without a process shutdown.

  • Dual-tap configurations support fully redundant DP transmitter assemblies for safety instrumented systems.

  • Uses the Rosemount 3051S DP transmitter to deliver flow readings and device diagnostic information via HART®.

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RF Module for Bluetooth 5.1 IoT Applications

Insight SiP (Sophia Antipolis, France) is launching their ISP1907-LL RF module, designed for classic IoT applications that require Bluetooth 5.1 standard communication for Long Range and Direction-Finding connectivity.

At an ultra-miniature size of 8 × 8 × 1 mm, with its integrated antenna, the ISP1907-LL RF module provides huge computing capability coupled with best-in-class battery life, with power consumption around 20 – 50% lower than previous generations of technology, making this Bluetooth Low Energy / BLE module a ready-to-use solution for most IoT applications with connected sensors for medical, healthcare, sport, fitness, and industrial devices as well as home automation and beacons. Its long-range capabilities enable wireless connectivity over an open field range of up to 400 meters between modules.

The RF module on the ISP1907-LL is based on the nRF52811 Nordic Semiconductor 2.4GHz wireless System on a Chip (SoC) integrating a 2.4 GHz transceiver, a 32-bit ARM CortexTM-M4, with 192 kB flash memory, and 24 kB SRAM and analog and digital peripherals.

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Position Sensor for Hydraulic Cylinders

The posichron® EasyMount from ASM Sensors, Inc. (Elmhurst, IL) is an absolute, non-contact and wear-free linear position sensor system with measurement ranges up to 5750 mm. The core part of the sensor is a strong, maintenance-free magnet fixed inside the cylinder. The sensor itself is mounted on the outside of the hydraulic cylinder and not inside the cylinder as is the case with commercially available solutions. No deep hole drilling is necessary for sensor installation. In case of maintenance or repair, the sensor is easily accessible from the outside. With this new design, hydraulic cylinders can now be equipped with displacement sensors much more cost-effectively. Small piston diameters with insufficient installation space can be equipped with sensors. Redundant sensor configurations are an option up to fourfold. Various designs are available to fit different installation conditions (including rod, profile, ultra-flat profile designs). The degree of protection is up to IP68 / IP69. The sensors reach a linearity of up to 0.02% of the measurement length.

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Sensor Technology Magazine

This article first appeared in the March, 2020 issue of Sensor Technology Magazine.

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