The PX 09 started as an EMF meter long ago but after some deep thought I changed the concept.

The PX 09 is not frequency limited
Contains two pick-up coils variable selectable by the user
A visible 10 LED display
A tone generator relative to a detected energy field
An audio amplifier to enable the user to hear (if within our normal hearing range) an electro magnetic field.
A line out socket to record events
Can be used interactively with external electro magnetic fields.
Positive action on/off toggle switch - no need to hold a switch on.
Easy to use, highly advanced
Portable or stationary use.

APLS click for details
Active and Passive Light Sensor

Asked some time ago to build equipment measure the level of light in a dark room, I built a prototype but with no light to detect it sat on the shelf.
After some inspired thinking it is reborn.
APLS is designed to detect and indicate on a LED display and via an audio tone, changes in relative light intensity.
When I added pulsing LED emitters it became a useful tool, the addition of switched ultraviolet and infrared allows various uses.
The ultraviolet light is a subtle light source for use when a low light is permissible.
The Infrared light is for use when an investigation is required in complete darkness ( a night shot camcorder can make use of this setting)

The detection range is approximately 3-4 meters using infrared light, any object seen or un seen capable of reflecting light, when in range of the emitters will cause the display to pulse, relative to the distance from the APLS.
The APLS can be used portably or stationary, and monitor a varied range of light sourses

DIGITAL LIGHTING click for details
An active system

DL is a high frequency pulsed lighting system using Blue, Ultraviolet and Infrared LED's it offer a new concept for still photography and video.

The pulsed light captures-freezes motion.
Individually switchable blue and ultraviolet light is a high energy monochromatic light source.
Infrared light is used by night vision camcorders.
Each colour LED is modulated by a lower harmonic of its primary frequency, the light vibrates.
A manual frequency setting allows the uses further options to experiment.

SENTINEL click for details
A passive system

Another alternative to the conventional EMF meter.
it can detect electric or magnetic fields independently.
auxiliary inputs.
It has wide ranging sensitivity controls, (+) and (-) LED display, audio alerts.
It can be used in many ways.
Can be used stand alone or whilst in motion.