Sentry Sample Sentry II

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The Sentry Sample Sentry II is designed to meet requirements for representative sampling by maintaining a constant flow rate with varying inlet conditions. EPRI-sponsored research and plant chemistry experts agree on the need for sampling at a constant velocity of 5–6 feet per second (1.5–.8 meters per second) for water samples with varying source pressures. Automated flow control is the only way to obtain constant sample flow regardless of source pressure.

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The Sample Sentry II, a patented automated sample conditioning module for remote or centralized sampling, has been designed to meet today’s requirements for representative sampling by maintaining a constant flow rate despite varying conditions and employs industry-proven Sentry conditioning components.
Digital control and display with alarm and shutoff capability improves operator safety and protects analyzers against over-temperature and pressure conditions. “Smart” sample modules with network communications for remote computer display and control:

Make remote sampling possible
Allow for unattended sampling
Simplify data acquisition or interface with DCS

Advantage:

Fully automated sample conditioning system provides automatic startup (including blowdown), flow control, and shutdown
Improves sample accuracy
Offers better chemistry control
Lengthens analyzer cell life
Self-cleaning
Increases operator efficiency
Automatic blowdown operation reduces buildup and improves sample representativity
Meets sampling guidelines recommended by EPRI (Report #CS-5164, ASME PTC 19.11, ASTM D5540, VGB Guidelines)

Ambient Temperature	32°–122°F (0°–50°C); RH 95% max. non-condensing at 104°F (40°C)
Display	graphical vacuum fluorescent display
Flow Control	0–3400 cc per minute, ± 5% of full scale
Input Power	100–240 Vac, 1 ph, 50/60 Hz
Instrument Air Required	80–120 psi (5.5–8.3 bar); air consumption <0.2 scfm (<0.34 scmh)