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Digital Compass Products

Ancient Compass The compass is the oldest scientific instrument. Invented in China, it was used for magical purposes as well as for navigation. The ancient compass pictured here consists of a spoon made of magnetic lodestone, resting on a bronze plate. The circular center represents heaven, and the square plate represents the Earth. The handle of the spoon points south. The plate bears Chinese characters which denote the eight main compass points and symbols from the I Ching oracle books which were correlated with directions.

Geosensory Compass The GEOSENSORY products take contemporary compass technology yet another step forward with the introduction of the GEOSENSORY range of solid-state miniature digital compasses. Our unique compass construction uses no moving parts or bulky fluxgate magnetometer coils. Instead, we rely on precise magnetoresistive technology to deliver the most reliable, smallest and most power-efficient electronic compasses available.


C2 Compass The C2 Compass is a miniature hand-held battery-operated eight-point compass with digitised voice output and auxiliary color indication. Applications include novelty gifts, mobility tools for the vision-impaired, jogging accessories, etc.

RDCM-802 Module The RDCM-802 Digital Compass Module is a miniature low-cost orientation-sensing module for industrial and scientific applications, toys and experiments. Based entirely on solid-state magnetoresistive technology (no moving parts, no fluxgate coils), this is a primary choice digital compass module where small size, low cost and reliable performance are important.

EBCM-802 Evaluation Board The EBCM-802 Evaluation Board is designed to demonstrate and evaluate the RDCM-802 module. The unit contains one such module in a convenient arrangement including a battery holder and orientation indicating LEDs. This low-cost evaluation board provides an excellent basis for introduction and experimenting with digital compass modules.

GPS Receivers

GPS satellite The Global Positioning System, originally developed for military use, has become a universally indispensable means of navigation. The system consists of 29 geostationary satellites. Each satellite transmits radio signals which contain an encoded time stamp. Using the transmitted time stamp, the GPS receiver determines how long it takes for the signal to travel between the satellites and the receiver. As the speed of electromagnetic waves is known, the receiver can determine the distance to each satellite. The location of the receiver can then be calculated by triangulating the known distances between the receiver and several satellites.


GPS-1200 The GPS-1200 miniature GPS receiver module is suitable for a direct connection to a computer (for example a laptop), to provide fast and cost-efficient GPS implementation.

The receiver comes in two versions, a USB interface version and a serial interface version. The tiny receiver contains its own antenna, and derives its power from the host computer interface. A CD ROM with drivers for Windows 95, 98, ME, 2000 and XP is supplied. The output format complies with the NMEA0183 standard, making it compatible with most popular mapping software, for example Microsoft Streets and Trips as well as with field strength measurement applications, such as WiNRADiO Field Strength Logger.

Electromagnetic Radiation Detectors

Base Station Antenna Electromagnetic radiation is all around us, with ever-increasing intensity, an inescapable fact of living in the information age. Some of this radiation is desired (TV, radio) some of it is not (bugging devices, electromagnetic interference), and some of it may be a potentially dangerous by-product of an otherwise useful function. GEOSENSORY electromagnetic radiation detectors can be used to determine the location of such radiation sources, or for safety checks and testing of electric appliances. GEOSENSORY detectors are suitable for home use, as well as for professional applications such as EMC pre-testing, surveillance countermeasures or communication systems installation.


ERD-1500 The ERD-1500 Electromagnetic Radiation Detector is an exceptionally efficient "RF Sniffer" developed to quickly and reliably locate sources of electromagnetic radiation. The detector contains a miniature wide-band antenna with a high-performance amplifier and detection circuit for maximum sensitivity. The detector features optical (LED) and acoustic (buzzer) indication. The brightness of the indicator LED and the pitch of the audible tone will increase proportionally with the strength of the detected signal, making it simple and easy to locate the radiation source. The ERD-1500 covers a very wide frequency range from approximately 50 Hz to 1500 MHz.