Customizable Devices Provide High Sensitivity at Very Low Flows, Low Pressure Drop,
High Stability, and Help Reduce Production Costs

Honeywell announced the introduction of the Honeywell Zephyr™ Digital Airflow Sensors that deliver the industry’s most accurate airflow reading across the operating range of the sensor. The new HAF Series devices provide highly accurate digital output, enhanced reliability, and repeatable measurements to meet many medical and industrial application specifications.

The Honeywell Zephyr™ Digital Airflow Sensors offer several competitive advantages not found in other digital airflow sensors, including:

* High 2.5% accuracy that allows for very precise airflow measurement, often ideal for demanding applications with high accuracy requirements;

* Customization, which allows the sensor to be designed to meet specific end-user  needs;

* High sensitivity at very low flows to enable the detection of the presence or absence of airflow in the application;

* High stability to reduce errors due to thermal effects and null shift to provide accurate readings over time, often eliminating the need for system calibration after printed circuit board (PCB) mount, and periodically over time;

* Low pressure drop, which typically improves patient comfort in medical applications, and reduces noise and system wear in components such as motors and pumps;

* Linear output to provide a more intuitive sensor signal than the raw output of basic airflow sensors which can help customers reduce production costs and implementation time.

The Honeywell Zephyr™ Digital Airflow Sensors simplify the customer’s production requirements due to Application Specific Integrated Circuit (ASIC)-based I2C digital output that eases integration to micro-processors or microcontrollers, reducing PCB complexity and component count. Their small size occupies less space on the PCB, allowing for a smaller PCB, which can reduce production costs and simplify installation in space-restricted applications. Their low 3.3 Vdc voltage option and low power supply requirements allow for use in battery-powered and portable applications.

Honeywell Zephyr™ Digital Airflow Sensors are designed to measure mass flow of air and other non-corrosive gases. They are available in standard flow ranges, and are fully calibrated and temperature compensated. They provide a digital interface for reading airflow over the specified full scale flow span and temperature range, and their thermally isolated heater and temperature sensing elements help provide a fast response to air or gas flow.

Potential medical applications include anesthesia delivery machines, hospital diagnostics (spectrometry, gas chromatography), nebulizers, oxygen concentrators, patient monitoring systems (respiratory monitoring), sleep apnea machines, spirometers, ventilators, and ventricular assist devices. Potential industrial applications include air-to-fuel ratio, analytical instrumentation (spectrometry, chromatography), fuel cells, gas leak detection, gas meters, HVAC filters, meteorology equipment, and variable air volume (VAV) systems on HVAC systems.

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New feature makes further customization possible

Schurter proudly announces the addition of a colour anodized aluminium housing to the popular line of metal pushbutton switches. The red and green housings can be used to distinguish the start/stop switching functions.

The robust vandal proof switch has an IK07 protection class for high impact and IP67 ingress protection against water and dust. Its low profile flat front construction guards against side impact. The actuator is made of durable stainless steel.

The standard versions of the new MSM color housing are offered in 19 and 22mm mounting diameters with electrical rating of 5A @ 250 VAC. Additionally, custom lettering, other mounting diameters, and colours are available. Versions with switching current and voltage of 100 mA @ 30 VDC, or 10A @ 250 VAC are also available. A version with IP67 rated microswitch provides seal protection from the back. Terminals are quick-connect. Assembly includes pre-wiring of the contact module, which is then snapped onto the actuator housing. Typical applications include controller panels for automated machinery, construction machinery, industrial and medical equipment.

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Finder has extended its relay range with versions designed to suit photovoltaic (PV) inverters, domestic appliances and other equipment needing reinforced insulation, high ambient temperature handling and full disconnection contacts.  The latest product introductions comprise the 45.31 16A rated mini PCB relay and 3 special variants of the 66 Series 30A rated power relays.

With an extended 3mm contact gap, the single pole NO 45.31 relay meets the requirements of the EN60730-1 standard for household use and is rated for operation at an ambient temperature up to 105ºC.  It has a high sensitivity 24V DC coil rated at 360mW.  In common with the 66 Series specials, the 45.31 has been designed with an 8mm clearance and creepage distance, ensuring safe separation of supply and output, and reinforced insulation between coil and contacts, meeting the requirements of EN60335-1 (VDE0700).

The 2 pole NO (DPST-NO) 66.22-x600, 66.22-x600S and 66.82-x600 30 amp power relays ensure a contact gap separation of 1.5mm, fully meeting the requirements of the VDE0126-1-1 standard for PV inverter applications.  In addition, the 600S variant provides a 5mm airgap between relay base and PCB for extra cooling particularly in systems where forced air cooling is employed as with many PV inverters.

For added flexibility, the 66 Series relays provide the options of PCB and flange mounting and Faston 250 terminations.  A 35mm rail mounting adaptor is also available.  A wide range of coil voltages is offered, spanning from 6V through to 125VDC.

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A growing requirement for DC switch disconnectors for solar photovoltaic (PV) power supply systems has motivated Kraus & Naimer to introduce a brand new range of disconnectors specifically designed for this particular DC application.

With rated operational currents from 16 amps to 64 amps and voltages from 450 to 800 using a utilization category of DC-22A, a solution for most isolator applications within the solar photovoltaic market can be found.

Available in a totally insulated enclosure with the option of a red/yellow or grey /black padlockable handle and with a degree of protection to IP 66/67 they can be installed in the most arduous of environments.

To complement this series a complete range of AC switch disconnectors is also available in totally insulated enclosures, this enables the contractor to obtain his switch disconnector requirements for the entire installation from one source.

A new up to date catalogue giving part numbers and technical details is available on request.
http://www.krausnaimer.co.uk/photovoltaic-disconectors

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The PSE EX piezo switch from SCHURTER has achieved approval according to ATEX class II 2 G Ex ib IIB T4. This approval enables the switch to be employed in explosive facilities above ground.

The protection class refers to the permissible application in areas where an explosive atmosphere can arise from a mix of air and gases, vapors or mists. The switch may be typically used in oil/gas production systems, in petrochemistry, as well as in paint and varnish mixing facilities. Preparations for extending the approval to include dust-Ex applications are underway. The standard design is available for a mounting diameter of 16mm with pin connections and various housing colors. Additional mounting diameters and connection designs are available
upon request.

The switches for Ex applications are labeled with the type of approval and an identification number. In accordance with the ATEX guidelines, an installation manual is included in the scope of delivery.

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Bulgin announces new version of MPI range of illuminated vandal resistant switches.

All MPI switches have bodies and buttons machined from high-grade stainless steel. A tough Polycarbonate lens in the stainless steel actuator gives a robust and aesthetically-pleasing switch.

All switches are front-panel sealed to IP66. However, Bulgin’s new range is also rear-of-panel sealed. This makes them suitable for use outdoors or in other situations where condensation or leakage behind control panels can be problematic. Rear panel sealing is available in a variety of styles, including single and dual colour with dot or ring LED illumination. Independent switch and LED terminals allows customers the flexibility to choose between permanent or controlled illumination. Contacts are single-pole push-to-make.

“The MPI series of switches boast IP66 sealed properties combined with a rugged design and a variety of style options,” comments John Wilson, MD of Elektron Technology. “With this latest addition to the Bulgin range Elektron Technology further enhances its complete design-and-manufacture service, offering our customers across a number of industries a flexible, quality solution to meet their control panel design needs.”

The switches have either solder tags or screw terminals, which facilitates easy field servicing, and also feature potted moulding and flying leads to the rear of the switch. With integral supply resistors the LEDs can now be driven directly from 6, 12 and 24V supplies.

The MPI series is tested to 750,000 mechanical and 35,000 electrical operations and rated at 50mA, 24V dc. The series has also recently undergone design improvements at construction stage, incorporating surface mount LEDs and TVS’s.

All switches in the MPI series have momentary action contacts making them ideal for access control and door entry applications including lifts, panic buttons, car park barriers, emergency telephones, vending machines and food processing.

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Wireless Technology Eliminates the Need for Communications Cabling or Power Line Installation, Saving Time and Money

Honeywell’s XYR6000 Wireless Position Sensor is based on one of the company’s most-proven sensor technologies. The XYR6000 position sensor helps improve overall reliability by giving users the ability to remotely monitor a number of applications ranging from valve position to safety shower emergency use.

Originally introduced by Honeywell Process Solutions (HPS) in June 2009, the XYR6000’s broad spectrum of potential is now being offered by Honeywell Sensing and Control to targeted OEM customers.

Based on the MICRO SWITCH™ CX hazardous area switch, the XYR6000 Wireless Position Sensor monitors position when used in conjunction with OneWireless™ systems, sending the signal from remote or potentially hazardous areas. Featuring full UL, ATEX, and IEC Ex approvals, the XYR6000 Series has calibration within 270 degrees rotation to apply in most linear and/or rotary position sensing applications. Its analog output provides true position span output in both percentages and degrees.

In addition to eliminating manual monitoring, the sensor’s accuracy improves safety by identifying linear or rotary valve positions, minimizing the risk of unwanted fluid release or unplanned product contamination. When used for safety shower notification, the sensor can serve as an emergency response trigger. The XYR6000 Wireless Position Sensor also simplifies maintenance by electronically tagging each valve in the system by identifying valves that have degraded or been damaged. This reduces the need for field technicians to manually inspect valves for maintenance.

Since the sensor carries all the appropriate hazardous location certifications, it is often ideal for applications such as monitoring valve position status, manual process valve position, safety shower and eye bath notification, tank overflow alarms, damper and louver position, gate/door position, and other applications where installing wires is inefficient, cost prohibitive, or simply unsafe.

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Schurter expands its family of EMI-Line Filters for one phase systems with a new and compact high end filter series, called the FMBB NEO. Three variations of 2-stage filter designs allow a specific selection of FMBB NEO filter products for efficient EMI solutions.

The new FMBB NEO Filter series consists of 3 different compact 2-stage filter designs. The 3 filter designs (Design C, Design D and Design F) are characterised by a high symmetrical and asymmetrical attenuation. The FMBB NEO filter Design C attenuates potentially strong conducted interferences. Design D is laid-out for the attenuation of high frequency interferences, whereas the Design F is designed more for low frequency noise attenuation. All designs come up with a high insertion loss performance. The FMBB NEO one phase filter is dimensioned as a 250 VAC filter at a rated current of 1-36 A according IEC and 125/250 VAC, 1-30 A according UL/CSA. The connection to the filter is made by quick connect terminals or with bolts and nuts, style M4. Optional flexible wire leads are available on request.

The compact NEO designed EMI-Filter is intended for use in industrial applications such as frequency converters, stepper motors, UPS-systems, current converters. On request medical versions with leakage currents of < 80μA (M80) respectively < 5μA (M5) are available. The series is ENEC and cURus approved and is qualified for use in equipment according IEC/EN standard 60950.

Technical Features:
- One phase EMI-Line Filter according IEC60939 and UL1283 available in 3 designs (design C/D/F)
- Current ratings: 1-36 A at 250 VAC (ENEC) or 1-30 A at 125/250 VAC (UL/CSA)
- Quick connect terminals / bolt and nut M4 terminals / flexible wire leads optional
- Standard or medical version M5 or M80
- Screw-on chassis mounting from top

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Joining Crydom’s broad line of Panel Mounted Solid State Relays, the new “EL” series offers AC & DC Outputs in a compact 21 mm wide package featuring imbedded quick connect terminals.  

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Crydom’s new “EL” series  of Compact Solid State Relays include models with output ratings up to 20 Arms from 24 to 280 VAC or 10 Adc from 3 to 100 VDC with optional external heat sink.  Logic compatible control input versions include 5, 12 or 24 VDC.  Output termination is via 0.25” (6.35 mm) quick connect terminals, while input terminals are 0.187” (4.75 mm) quick connects.
 
Featuring 4kV all solid state optical isolation, the Triac output AC versions are available with either zero voltage turn-on for resistive load
applications or random turn-on for inductive load applications, while  DC output versions feature low RDS on resistance FETs suitable for most DC resistive or inductive loads. “EL” series SSRs are RoHS & China RoHS compliant, CE certified, UL and cUL recognized.

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Finder has introduced surge protection devices (SPD) designed specifically for photovoltaic (PV) panel installations.  Additions to its popular 7P Series of SPDs, three new Type 2 surge arresters will protect PV systems from the effects of lightning strike and electrical switching transients.  The products are already supporting the company’s own PV panels at its primary manufacturing plant.

Featuring encapsulated spark gap and/or replaceable varistor modules, the three devices protect the more vulnerable DC side of commonly used earth free and mid point earthed PV systems.  The range includes: the 7P.26.9.420, providing 2 varistors and 1 spark gap for 420V DC systems; the 7P.23.9.700, providing 3 varistors for 700V DC systems and the 7P.23.9.000, providing 3 varistors for 1000V DC systems.

Each device integrates both a visual indicator and a signalling contact to warn when a varistor module needs replacing.  Connection to the signalling contact is via a convenient plug-in terminal block.  The SPDs comply with EN 61643-11 standard and can be 35mm rail (EN 60715) mounted.

Finder’s introduction of a range of SPDs tailored to the needs of PV installations comes at a time when UK government Feed-In Tariffs (FITs) appear to have stimulated a step increase in interest in PV system in the country.  The UK is now the fastest growing market for PV solar energy installations, estimated to produce 96MW of electricity in 2010 compared with 6MW in 2009.

At the same time, a prospective revision of the UK wiring regulations, placing far more emphasis on the provision of protection from electrical surges, has meant there is a resurgence of interest in associated products, in particular varistor and spark gap type SPDs.

PV panels at Finder’s prime manufacturing site in Almese near Turin in North West Italy have been producing an output power of 55kW since early 2009, equating to 61,000 kWh/year.  So pleased with the performance, the company has this month commissioned a further 60kW of PV panels, which of course will be protected by the new 7P Series surge arresters.

Constructed using multicrystalline silicon PV modules, Finder’s initial PV system is calculated to have reduced CO2 emissions by about 37 tons/year, achieving annual cost savings of around 11 TOE (tonnes of oil equivalent).

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