Yokogawa TDLS8200 Probe-Type Laser Gas Analyzer

TDLS8200 is the probe-type member of the TDLS family. It measures O2, CO, CH4, NH3 and HCl by near-infrared absorption; in the multiple model, two laser systems measure O2 with CO and/or CH4 together. The company's spectrum area method is less affected by side gases than 2f wavelength modulation and includes temperature and pressure correction.

Installation and operation

• No need for two opposing flanges, light alignment or cross-wiring; measuring area 0.5 m.
• Probe, flow cell and reflector type options are available; the reflector type allows pipes of 0.25-0.5 m diameter.
• Blaster purge function for dusty processes; in a boiler application, O2 and CO response time is stated as 2 seconds.
• Trace levels monitored thanks to a reference cell; HART, 7.5-inch HMI and 50-day trend logging.
• SIL 2 compliant; SIL 3 with two instruments.

Choosing TDLS8200

Active compensation can be used in processes with fluctuating pressure and temperature. Besides boiler combustion control, oxygen monitoring in hydrogen-containing environments in chlor-alkali electrolysis and methane safety at chemical plants are sample applications.

Tetra selects the probe length and configuration according to boiler or pipe dimensions and directs the single-flange mounting on site. Commissioning the blaster purge line and verifying the measurement with reference gas are within the scope of service; because no filter or pump diaphragm is required, maintenance visits are kept short.