International
AMS 3211-860/150 Ex
The in line flue gas probe AMS 3211-860/150 is designed for applications in Ex Zone 1 according to ATEX II 2G Ex d IIB + H2 T3. The flue gas probe is equipped with an ATEX certified temperature control device, which switches off the heater of the ZrO2 sensor when the flue gas temperature exceeds 500 °C. The temperature control device is SIL 2 certified. AMS also manufactures Ex-certified flue gas probes for extreme applications and for flue gas temperatures up to 1200 °C.
All AMS flue gas probes can be fitted with a time controlled back-purge unit for applications with high dust content. Time controlled by the AMS transmitter instrument air with a pressure of up to 6 bar (g) is forced against the sinter metal filter from inside to blow off dust which has accumulated on the outer surface. Dust accumulation on the sinter metal filter surface which interferes with the diffusion of the measuring gas to the ZrO2 sensor can be avoided. The back-purge unit can be integrated into the pneumatic unit.
Additional product features:
- Immersion depth up to 860 mm
- Fast and easy sensor replacement
- Flanges are available in DIN or ANSI sizes
- Continuous monitoring of sensor signal, heater and measuring value on plausibility by the transmitters AMS 3220 or AMS 5200
- Back-purge and auto-calibration features are available as options
Technical data
| ZrO2 probe | AMS 3211-860/150 |
|---|---|
| Measuring principle | ZrO2 probe with Pt-electrodes |
| Application | Residual oxygen in flue gas |
| Construction | ZrO2 sensor installed in the tip of the probe with stainless steel sinter metal filter screwed on, designed as a flame arrestor |
| Flue gas temp., max. | 500 °C |
| Dust content (flue gas) | max. 5 grams/Nm3, if higher shield to protect against abrasion or separate protecting tube |
| Flue gas velocity | max. 20 m/Sec. or separate protecting tube |
| Time for pre-heating | ~ 10 Minutes |
| T90 time | < 10 Seconds |
| Reaction time | < 2 Seconds |
| Probe length | 150 – 860 mm |
| Connecting flanges | DN 80 PN 40 (larger on request) |
| Material | Stainless steel 1.4571 |
| Installation in the stack | pointing downward |
| Protection | IP65 |
| Reference air supply | by separate pneumatic unit |
| Calibration gas supply | by separate pneumatic unit |
| Ex classification | II 2G Ex d IIB + H2 T3 |
| Weight | ca. 10,5 kg |
| Accessoires | |
| Transmitter | AMS 5200 and AMS 3220 in housing IP 65 |
| Pneumatic unit | GRP housing, dimensions: 500 x 500 x 300 mm |
| Version: AMS 3211-860/150 E V01-2010-12 |