Simple to Align and Commission
One person can easily align and commission the system without the need for special training or skills. No telescope or alignment mirrors are needed for the installation over any distance. After an initial coarse adjustment byeye, a hand held terminal provides separate “radar” displays of the Transmitter and Receiver alignments. This makes it easy tooptimise the adjustment for maximum signal strength.

The built-in calibration of the Polytron Pulsar does not need any manual adjustment or standard test gas. After the alignment procedure is finished a self-zeroing sequence is started to complete the commissioning of the system. The parameters about alignment and signal strength are logged and will be used to deter-mine any future misalignment or build up ofdeposits on the optical lenses.

Increased Performance
Continuous communication between Receiver and Transmitter across a signal line allows the system to adapt to difficult environmental conditions and ensure highest availability. The high power xenon lamps combined with a sophisticated algorithm which varies the irintensity and frequency makes the Polytron Pulsar immune to influences from solar radia-tion, stack flares, arc-welding or resonance effects associated with the vibration from rota-ting machinery, as well as environmental changes along the beam like fog, mist, and snow. A higher flash rate is also triggered by the first indication of gas, allowing a fully validated gasreading along with a reduced response time.

Failsafe
The detector is designed so that no fault cango undetected. In normal operation the output signal is 4 to 20 mA, depending on the gas concentration measured. Whereas a signal of< 1 mA indicates a fault and a signal of 2 mA indicates a beam blockage. In addition a continuous self-test of the Polytron Pulsar will issue a pre-warning signal of 3.5 mA where the detector is still operational but requires some attention – for example when there is a buildup of deposits on the optics, or misalignment of the transmitter or receiver. This way maintenance can be scheduled without downtime. The Polytron Pulsar carries a Safety IntegrityLevel rating of 2 (SIL 2).

Heated Optics
Controlled internal heating of the optical lenses prevent the formation of ice and build up of snow on the optics even under severe weather conditions. It also eliminates condensation build up on the lenses.

Built-in Data Logger
An internal data-logger keeps a detailed record for the previous 7 days of operation, and consolidated records for the previous 32weeks. These logs include such essential information as actual readings, events like “beam block” and gas alarms, warning flags, signal strength, alignment, supply voltage andinternal temperature.

Gas Library
The detector can be pre-calibrated for up to four gases. Each detector is supplied with methane and propane calibration as standard which are field selectable by the user.

Worldwide Approvals
The Pulsar can be used worldwide with the following approvals: ATEX, IECEx, UL, CSA and GOST.

The Hand Held Terminal
The hand held terminal (HHT) is a robust weatherproof unit, certified for use in a hazardous, classified area. The terminal is used to align and zero the Polytron Pulsar transmitter and receiver, and to provide configuration and diagnostic functions. More comprehensive diagnostics are provided in conjunction with the Polytron Pulsar PC software and a personal computer located in the non-hazardous area,when using the AI500 digital interface.

Polytron Pulsar Brochure
Polytron Pulsar Datasheet