Products

In-situ Optics

Designed for In-Situ measurements, these sensors consists of a transmitter and receiver creating single, dual and multi-path measurement situations. The configuration used depends on measurement conditions and sensitivity requirements. The transmitter includes a lens and a connection for the optical fiber cable. The receiver contains a lens, a detector with preamplifier and driver electronics for the optical return signal. The laser light is coupled from the optical fiber in the transmitter to the transmitter lens and passes through the measurement volume. The lens in the receiver focuses the in-coming laser light on the detector where it is converted to an electrical signal. This signal, which may be amplified if necessary, is transmitted via coax cable to the central controller, or it may be converted to an optical signal and returned to the central controller via fiber optic cabling. The latter configuration is employed in electrically noisy environments or where the measurement location is more than 200-300 m from the analyzer.

In-Situ Single Pass Optics

In the single pass configuration, the laser beam is brought to one of the optics by a fibre-optic cable that couples via an APC connector to a ‘special’ lens rigidly mounted on an x-y tilt stage. This is the launching element. The laser beam is transmitted through the stack/duct and collected at the other side. The beam is focused into an infrared detector located in the receiving element. The voltage output of the detector is transmitted to the LasIR analyzer via a coaxial cable. In cases where there is excessive electrical noise in the vicinity of the coax return cable, or if the separation of the optical head from the analyzer is very long (>200-300 m) an optical preamplifier is employed to convert the detector signal to an optical signal for transmission to the analyzer via a second optical fiber.

In-Situ Dual Pass Optics

In the dual pass configuration, the laser beam is brought to one of the stack optics by a fibre-optic cable that couples via an APC connector to a specially constructed launch/receiver element. The laser beam is transmitted across the stack/duct and when it arrives at the opposite side it is reflected back to the detector by a retro-reflector.