bullet Sensors & Transducers e-Digest (S&TD)



No. 5, May 2002



Table of Contents




Embedded Web Sensor


The device is a WEB sensor board (duty-cycle output temperature sensor SMT130-160, or Universal Transducer Interface giving the possibility to connect any resistive or capacitive sensor) based on a Microchip’s PIC16F877 single chip microcontroller. The device is connected to the Internet by a standard Ethernet Local Area Network. The device is using a standard TCP/IP protocol. In order to have a proper connection to the Internet the user should configure a valid IP address for the LAN being used. For that case, the device should be connected to a Personal Computer using a standard RS232 interface – 9600 baud, 8 data bits, 1 stop bit, No parity error check, No hardware flow control. The communication is implemented like a normal terminal program (for example Hyper Terminal). The user could use different programs in order to communicate with the device. For example, a standard browser Internet Explorer or Netscape Communicator. After sending the IP Number of the device, the result will be displayed in the browser window. In this case, the device simulates a simple WEB server. The HTML page sent to the computer is compatible with any standard browser (you should just write the IP address in the address window of your browser. Another way for communication is to use a terminal program like Telnet or Hyper Terminal. First, a normal connection to the Embedded PIC WEB Sensor IP address should be opened. After, the user should send the command “m” (to measure) and will receive the current temperature as a reply.

Ratcho Ivanov, 

Alexander Kerezov,

Ivan Lesichkov.


Technical University - Sofia, Bulgaria

E-mail: akerezov@tu-sofia.acad.bg

Web sensor board




Ultra Low Noise and Low Cost Dual Axis Accelerometer


ANDOVER, Mass., May 28, 2002 - The Ultra Low Noise Accelerometer, the most recent in a successful line of standard, submicron CMOS accelerometers from MEMSIC, Inc., the leading provider of CMOS-based MEMS accelerometers/sensors, is redefining the accuracy of tilt and inclinometry functions in many applications across a wide array of industries, including Automotive and Consumer Electronics. The new accelerometer, because of its low noise floor and high degree of accuracy, has proven to be well-suited for automotive applications - such as car alarms, rollover, and navigational devices - and in consumer electronics, such as Personal Digital Assistants (PDAs), Cell Phones and Global Positioning Systems (GPS). "We have found that these markets in particular have a strong need for the Ultra Low Noise Accelerometer," said Yang Zhao, CEO of MEMSIC. "As with all of MEMSIC's products, our standard CMOS structure cuts costs by up to 50 percent; in addition, the Ultra Low Noise accelerometer offers unparalleled low noise resolution due to its low noise floor, eliminates the need for external offset adjustments because of its tighter offset, and can allow tilt angles approaching .1° to be measured, improving accuracy and reliability of products that rely on tilt."The Ultra Low Noise accelerometer is based on heat convection and requires no proof mass, eliminating stiction and particle problems associated with other devices. Because MEMSIC has successfully integrated MEMS technology with leading-edge IC processes to create MEMS ICs, the ICs are fully programmable at the end of the manufacturing cycle and integrate the electronics and sensor on the same IC, saving customers money and space - a significant benefit for manufacturers of small electronic devices such as cell phones and PDAs.


Input International bvba

Tel.: +32 12 67 20 02

Fax: +32 12 67 20 03

E-Mail: marleen@inputint.com

Accelerometer MXA2500V



Isfet pH Sensors


(ISFET) Ion Sensitive Field Effect Transistors are electronic devices, similar to MOS transistors, that measure pH of solutions. They can be fabricated using microelectronic technologies and, thus, they have advantages of small size and cost compared to standard pH macro electrodes. Biomedical, environmental and analytic process control are attractive applications of ISFET chemical sensors. CNM pH-ISFET sensor parameters are <here>.


Centro Nacional de Microelectrуnica Instituto de Microelectrуnica de Barcelona

Campus U.A.B. Phone: +(34) 935 947 700

E-08193 - Bellaterra, Fax: +(34) 935 801 496

Barcelona (SPAIN) http://www.cnm.es/

ISFET pH sensor



Capacitance Accelerometer Measures Low-Level Accelerations

in Aerospace and Automotive Environments


New Endevco's Model 7292-XM1 utilizes unique variable-capacitance microsensors for the measurement of low-level accelerations in rugged aerospace and automotive environments. Because it can respond to DC accelerations (steady-state events), the accelerometer is ideal for measuring whole-body motion immediately after being subjected to shock motion and in the presence of severe vibration inputs. Depending upon the particular model (X number), range is 2 to 100 g's full-scale. Higher/special ranges are available. Over-range stops are provided. The accelerometer is an excellent replacement for the popular 2262 series of piezoresistive models, which are used in many flight-test and automotive applications. The 10-32 mounting and electrical interface of the 7292-XM1 accelerometer are similar to that of the 2262 series and is compatible with most bridge instrumentation. Shunt calibration simulation is included as part of the unit. Designed to provide years of reliable service, the Model 7292-XM1 is packaged in a ruggedly designed, stainless steel, hermetically sealed case. A 30" shielded cable is provided. The 7292-XM1 accelerometer operates from a 10 VDC source and provides a high-level (±2V) differential, DC-coupled, low-impedance output. The use of gas damping allows for the near-critically damped characteristics found in the 2262 series of accelerometers without thermally induced changes in frequency response. The 7292-XM1 accelerometer is insensitive to magnetic fields and requires a warm-up time of only one millisecond.


Bruce Lent

Product Manager

ENDEVCO Corporation

Tel: 949.493.8181

E-mail: bruce.lent@endevco.com

7292 Accelerometer



STAR250 - Radiation Hard CMOS Image Sensor


The STAR250 sensor is a radiation hard CMOS active pixel sensor. It contains integrating APS (Active Pixel Sensor) with 0.5mm CMOS technology. Its resolution is 512 x 512 pixels with 25mm pitch, the frame rate is up to 30 full frames per second. To improve MTF (Modulation Transfer Function) and PRNU (Photo Response Non Uniformity) there are 4 diodes per pixel. To avoid fixed pattern noise there is an on-chip double sampling circuit. An electronic shutter and an on-chip 10-bit ADC are included. The ceramic package is a JLCC-84 type.


FRAMOS Electronic Vertriebs GmbH

Dauthendeystrasse 2, D-8 1377 Munchen

Tel. +49.89710667-0, fax +49.89.710667-66

E-Mail: info@framos.de

STAR250 CMOS Image Sensor



New Silicon Digital-Output Temperature Sensors from Texas Instruments


The TMP100 and TMP101 are the first in a new line of silicon, digital-output, temperature sensors from TI. Available in miniature SOT23-6 packages, the TMP100 and TMP101 contain a 12-bit A/D converter, silicon temperature sensor and two-wire serial interface. The TMP101 also features programmable thresholds with ALERT function. Key features are very low quiescent current (75 uA max), typical temperature measurement within 1.0°C and resolution of 0.0625°C, wide temperature range (-55°C to +125°C) and low cost. They will benefit any system requiring temperature measurement, programmable temperature thresholds or temperature control.


TI News, May 2002 



Owl Ultra Sensitive Line Scan Camera


The Owl Ultra Sensitive Line Scan Camera is the first of a family of high performance line scan cameras from Pixel Devices. The Owl cameras, using Pixel Devices' Low Noise Linear Sensors, have high sensitivity, low noise and a maximum clock rate of 50 Mpixels/sec per output. All cameras in the Owl family will use Camera Link to further ease the integration of the camera into a user's application. The cameras will produce 14 bits per pixel and can be configured to optimize their performance for your application. The Owl Cameras have the sensitivity of a TDI camera with the ease of integration of a line scan camera. The initial release will operate with less than 10e-/pixel read noise at 40,000 lines/sec. The beta release of the camera is scheduled for late August 2002 and production cameras will be available in October of this year. We have called our cameras the Owl since it has many characteristics in common with owls -Sensitivity - the ability to see in very low light (>1900 DN/nJ/cm2) Quiet - Very low noise (< 10e- RMS) Speed - Can operate (fly) very fast (up to 50Mpixels/sec/output).


Gary Glaser 

408-616-8852 x 156

E-mail: glaser@pixeldevices.com





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