Warsash Scientific offer a wide range of Pyroelectric Detectors in Single Element, Dual Element and Quad Element designs. To satisfy a broad range of applications, we provide various element geometries, filters and housings.
With the addition of the new DigiPyro® Family, setting the standard in digital motion and presence detection, we have successfully begun helping our customers convert analogue detectors to digital. The latest DigiPyro innovations include the "Smart" DigiPyro, for integrated motion electronic circuitry. Our clients are not limited to off-the-shelf designs; customised designs are also possible.
For a standard Dual Element Detector, the signals are in the range of 3000 V/W. That means the infrared radiation of a person moving at a speed of 1m/s with a distance of 10m from the detector generates a signal of some mV. Output signals can be analogue as well as digital.
Pyroelectric Detectors utilise the "Pyroelectric Effect" for non-contact radiation measurement. Several types of crystals create charges on the surface, induced by temperature changes in the material that cause a change in the polarisation of the sensor material. Whenever a change occurs in the radiation that is absorbed on the top surface of the sensitive material, the temperature of the material changes and the Pyroelectric Detector generates a signal. Using an IR filter allows one to select the sensitive wavelength range. If the radiation does not change, the temperature of the crystal will reach equilibrium and the Pyroelectric Element will discharge.The Smallest Pyroelectric IR & Thermopile Surface Mount Detectors (74KB)
The DigiPile™ family of Digital Thermopiles is the latest in digital infrared sensing technology innovation and provides OEM designers with reduced space requirements on printed circuit boards, requires fewer additional components, and provides improved resistance to electromagnetic interference (EMI). The DigiPile family is offered in a range of housing and sensing areas with applications in thermometry, pyrometry, and non-contact temperature sensing.
Warsash Scientific offer a wide range of Thermopile Detectors including Single-Element, Dual- Element and Quad-Element designs. The "Element" refers to the size of the infrared absorbing surface. We offer various surfaces and housings. Our clients are not limited to off-the-shelf designs; customised designs for the most demanding applications are also possible.The Smallest Pyroelectric IR & Thermopile Surface Mount Detectors (74KB)
Warsash Scientific offer a wide range of Thermopile Modules. The modules consist of a thermopile sensor mounted on a PCB with a connector. The PCB can also provide for optional features such as voltage regulation and a noise-reduction filter. The ISO-thermal sensor concept delivers an important upgrade to the thermopile family; by utilising the unique, patented construction of the ISO-thermal sensors, we are able to offer this range of devices with improved performance, delivering substantially improved temperature measurement performance under thermal shock conditions. The ISO-thermal module includes integrated temperature compensation for a defined temperature environment and the calibration to a certain object temperature range. Modules are offered as programmed per individual customer request, and there is a range of standard versions. For requirements of defined spot sizes, we offer sensors with a field of view defined by optical apertures, internal lenses or external mirror optics.
A temperature reference output is included. Upon request, the thermopile modules can also be supplied as calibrated modules but without internal temperature compensation. In this case the customer will do the temperature compensation externally with the use of the supplied reference output.
Thermopile detectors are composed of several thermocouples typically connected in series or, less commonly, in parallel. They are DC-type detectors and, thus, best suited for non-contact temperature measurement. These thermopile sensors are based on silicon micromachining technology. A special IR-absorption layer covers the hot junctions creating the sensor's sensitive area. The output of a thermopile is usually in the range of tens or hundreds of millivolts. In addition to increasing the signal level, the device may be used to provide spatial temperature averaging.
Thermopiles do not measure the absolute temperature, but generate an output voltage proportional to a local temperature difference or temperature gradient. Thermopiles are the key component of the infrared thermometers that are widely used by medical professionals to measure body temperature via the ear.Send Enquiry