Retractable probe housing EXtract 821M

manual

Product overview
EXtract 821M is a manually operated retractable probe housing in plastic designed for installation on process tanks or piping. The drive inserts and withdraws sensors between the process and a cleaning chamber, with secure locking in the measuring and service positions. Cleaning, rinsing and calibration can be performed while the process remains running.

Your advantages

• Robust design with integrated scraper
• Automatic locking system with indicators for measuring and service positions
• Automatic safety lock when the sensor is removed
• Safe handling at elevated process pressures due to rotary drive
• Material options: PVDF or PEEK
• High-stability protection cage in Alloy C22 for PVDF version
• Suitable for use in ATEX zones
• Immersion length options up to 194 mm
• Wide variety of process connections and sealing materials
• Rated for up to 10 bar and 140 °C
• Easy retrofit to pneumatic drive possible

Applications

• For sensors Ø12 — 325 mm or Ø12 — 380 mm liquid-filled with PG13.5 thread (pH glass and ISFET sensors, conductivity, temperature, turbidity and optical sensors)
• Chemicals
• Water and wastewater treatment
• Harsh processes
• Situations requiring sensor replacement under process conditions

Configuration / options

• Wetted materials: PVDF or PEEK
• Sealing materials (wetted): EPDM (FDA/USP VI), FPM (Viton), FFKM (Kalrez)
• Sensor types: 325 mm Ø12 PG13.5 gel-filled or 380 mm Ø12 PG13.5 liquid-filled
• Process connection: Flange DN50 PN16 or Flange ANSI 2" 150lbs
• Cleaning connection: G 1/8" female, G 1/4" female, or 1/4" NPT female
• Position feedback: without or electrical (NAMUR) option

Technical specifications

• Process pressure: 0…10 bar
• Process temperature: -10…140 °C
• Ambient temperature: -10…70 °C
• Immersion length: up to 194 mm
• Sensors: 325 mm Ø12 PG13.5 (gel-filled) / 380 mm Ø12 PG13.5 (liquid-filled)
• Materials: PVDF / Alloy C22, PEEK
• Sealings: EPDM, FPM (Viton), FFKM (Kalrez)
• Process connection: Flange DN50 PN16 / ANSI 2" 150lbs
• Cleaning ports: G 1/8", G 1/4", FNPT 1/4"
• Operating power: manual
• Limit switches: optional electrical NAMUR switches