ALRAD ELECTRONICS
PRODUCTS
ANALYTICAL SYSTEMS
DENSITOMETERS
ELECTRON MULTIPLIERS
HIGH VOLTAGE
INFRA RED DETECTORS
LASER DIODE MODULES
LASER GOGGLES
LASER PRODUCTS
LASER PROJECTORS
NUCLEAR PRODUCTS
OPTOELECTRONIC SOCKETS
PHOTODETECTORS

Dexter Thermopiles for Infrared detection

Dexter Research Centre is a leader in the manufacture of high quality; high output Bismuth Antimony thin film and Silicon based infrared sensing thermopiles.
Thermopiles have a very wide spectral response from the UV to the far infra red and the wavelength of response can be limited by the addition of various filters or windows which can be either be built into the detector encapsulation or can be external.

Thermopile detectors are voltage-generating devices, which can be thought of as miniature arrays of thermocouple junctions. Our detectors are hermetically sealed in TO-18, to-5 or TO-8 transistor type packages, purged with inert gas and heat treated to ensure long term stability. Since the detector acts as pure resistance,
it generates no 1/f or microphonic noise, but only the Johnson noise of its own resistance.

Applications for thermopiles are limitless, but include:-

• Non contact temperature measurement
• Gas analysis
• Hazard control including flame and explosion detection
• Horizon Sensors

Thermopile Development Tool- Miniature Amplifier PCB
Available in three amplifier gains: 300, 500 and 1,000, this PCB includes a LM20 temperature sensor and 1.25V voltage reference. Although sized for single channel TO-5 packages, this amplifier is electrically compatible with all Dexter Research Center detectors, providing convenient buffering and pre-amplification of thermopile signal. The amplifier circuit board is impressively small (0.35” x 0.85”) and is designed around the AD8628 amplifier with ultra low offset (<1μV), low drift (<0.005μV/°C), and low bias current (100pA). The Mini Amp will operate on a 2.7V to 5.5V single supply, is chopper stabilized and has greatly reduced digital switching noise (0.5μVp-p from 0Hz to 10Hz, input referred).

For further information, click here.