Products Sensors & transducers An integrated digital ambient-light sensor
Maxim Integrated Products has introduced the MAX9635, a fully integrated digital ambient-light sensor (ALS) with an adaptive gain block. Designed using the company's proprietary BiCMOS technol- ogy, this device integrates two photodiodes, an ADC, and all necessary digital functionality into a 2 x 2mm package.
This consumes low amounts of power, signifi- cantly extending battery life. In addition, it offers a 4,000,000 to one dynamic range to ensure ultra- precise lux readings in all ambient-light conditions. According to the company, the MAX9635 is suitable for tablet and notebook PCs, smartphones, TVs, digital lighting-management systems, and light-intensity monitoring applications. With ALS solutions, system designers can auto-
matically adjust display brightness based on the amount of ambient light. Since backlighting accounts for a significant portion of the system's power budget, dynamic brightness control can translate into substantial power savings. Maxim Integrated Products
www.maxim-ic.com/ALS
Compact combo inertial sensor Now available from Gleichmann Electronics is the SD746 combo sensor from SensorDynamics. Key features of the 6 x 6 x 1.2mm3 inertial sensor are three measurement axes each for angular rate and acceleration as well as a wide measurement range of up to ±2048°/s for angular rate and ±8g for acceleration. The maximum offset error at room temperature is ±5°/s for the gyro- scope signal and ±0.1g for the accelerometer signal. The SD746 is suitable for use both in battery powered consumer applications and industrial instrumentation and control applications. Gleichmann Electronics
Enter 675 T: +49 (0)7249 910435
www.msc-ge.com Stainless steel tape position sensors
ASM has introduced the POSI- TAPE family of stainless steel tape position sensors, with the WB10ZG series offering a 6.5ft (2000mm) measurement range in a compact 2 x 2 x 3.3in housing. The sensor consists of a specially produced stainless steel tape that is taken up onto a precision machined drum. With its high degree of flexibil- ity, the steel tape offers a very high lifetime and is well suited to applications where pulleys are required due to space con- straints that prevent the direct inline measurement.
In areas where icing can occur, the flat, smooth surface of the tape also allows for the quick removal of ice accumulation. The standard tape brush continu- ously wipes the tape surface to remove debris.
This position transducer offers an enclosure rating of IP65 (IP67 with mating connec- tor) and is available with 0.5-4.5V, 0.5-10V and 4-20mA analog outputs or SSI, CANopen, CAN SAE J1939 digital outputs. The output linearity is ±0.05% full scale over the 6.5ft measure- ment range. The WB10ZG is also resistant to 100g/11ms, 100 shocks and 20g 10Hz-2kHz, 10 cycles vibration.
At the heart of this position sensor is a magnetic encoder that translates the linear motion in an electrical signal. An M12 connector provides for a quick electrical connection to be made during installation. ASM T: 0845 122 2123
Enter 676
www.asm-sensor.co.uk 16 FEBRUARY 2011 Instrumentation Intelligent laser Enter 674
voltage range When position indication is needed on pneumatic cylinders but feedback is 110V, ifm elec- tronic has introduced the MR range of cylinder sensors. The MR range is simple to fit. If the cylinder has a T-shaped slot the sensor just drops in and a twist of the fastening disc secures it. If there is a tie-rod or another cylinder form, the com- pany supplies many adapters for common cylinder types. The insert moulding technique used to manufacture the MR range of reed switches renders them extremely robust mechanically and also absolutely sealed against moisture ingress. LED indication is standard, and in-line connectors are offered. Operating voltage of these two-wire devices ranges from five to 120V AC or DC (limited to 50V AC or 60V DC in the connector versions) which on DC will switch PNP or NPN. ifm electronic T: 020 8213 0000
www.ifm.com/uk
Cylinder sensors for a wide
Enter 677
displacement sensor An intelligent all-in-one laser displacement sensor has been launched by Panasonic Electric Works. The HL-G1's state-of-the-art CMOS sensing method allows for high precision measurement of objects impossible for the conven- tional PSD method. For example, objects with non-reflective surfaces such as black rubber, or metal sur- faces with hairline cracks, can now be sensed reliably and precisely. In addition, the laser sensor's lightweight body makes it suitable for mounting on moving parts. A clear digital display indicates the displacement value, allowing the user to adjust settings on site using the operation button. By combining the company’s SUNX HL-G1 laser sensor with a GT touch panel, the sensor settings can be checked and/or modified quickly from any location. Panasonic Electric Works T: 01908 231555
Enter 678
www.panasonic-electric-works.co.uk
LVDTs for demanding applications
RDP Electronics’ linear variable displacement transducers (LVDTs) are inherently robust and durable enough to meet the rigours of testing in situ- ations generating vibration or shock. Such test situations are numerous, but typical applications will include vehicle testing, recoil testing, switchgear testing, and use on rolling mills and steel production machines, which often involve high levels of shock and vibration. The rugged LVDT technology means they have a high cycle life, excellent accuracy and repeatability, with the added benefit of being an absolute device with infinite resolution. Because the sliding core of an LVDT does not touch the inside of the tube in which it is housed it can move without friction, ensuring reliability, while the absence of any sliding or rotating contacts allows the device to be totally sealed. Typically, the housing is made of stainless steel, thus providing high levels of protection against the operational environment. A wide range of LVDTs are available
from the company for different types of accurate displacement measurement. RDP Electronics T: 01902 457512 Enter 679
www.rdpe.com
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