Professional Lab-Grade ORP Probe with Double Junction & 2-Meter Cable
The Milwaukee MA921B/2 is a precision lab-grade ORP (Oxidation-Reduction Potential) probe featuring a platinum sensing element and double junction design for accurate redox measurement in laboratory, industrial, and water treatment applications. Compatible with Milwaukee BNC connector meters, this probe features an extended 2-meter (6.56 ft) cable for exceptional reach and a gel-filled reference system for superior stability in challenging testing environments.
Key Features:
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Platinum Sensing Element: High-quality platinum electrode delivers accurate, stable ORP/redox potential measurements from -2000 to +2000 mV
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Lab-Grade Precision: Professional-quality probe engineered for accurate, repeatable ORP measurements in research and industrial settings
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Double Junction Design: Dual reference junction provides superior protection against sample contamination and extends probe life in difficult samples
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Extended 2-Meter Cable: Extra-long 6.56 ft cable provides exceptional reach for large tanks, deep vessels, and hard-to-access monitoring locations
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Gel-Filled Reference: Ag/AgCl reference with gel electrolyte ensures stable readings and minimal maintenance
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Universal BNC Connector: Quick-connect BNC fitting ensures tight, reliable attachment to Milwaukee monitors, controllers, and meters
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Wide Temperature Range: Operates from 32 to 212°F for diverse testing conditions
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Rugged Construction: Durable design built to withstand frequent use in demanding laboratory and industrial environments
Technical Specifications:
- ORP/mV Range: -2000 to +2000 mV
- Temperature Range: 32 to 212°F (0 to 100°C)
- Sensing Element: Platinum
- Reference Type: Double junction, Ag/AgCl with gel electrolyte
- Connector Type: BNC (quick-connect)
- Cable Length: 6.56 ft (2 meters)
- Weight: 8 oz
- Grade: Laboratory grade
- SKU: MA921B/2
- Barcode: 810666009220
- Made in Romania
Applications:
Essential for water treatment plant monitoring, wastewater oxidation control, swimming pool and spa sanitization verification, aquaculture dissolved oxygen correlation, hydroponics nutrient solution optimization, laboratory research, environmental water testing, food and beverage production (sanitizer effectiveness), pharmaceutical manufacturing, and any application requiring accurate redox potential measurement.
Compatible Equipment:
Works with Milwaukee monitors, controllers, and any ORP/mV meter featuring a BNC connector. The universal BNC connection ensures broad compatibility across the Milwaukee equipment lineup and other BNC-compatible instruments.
Understanding ORP Measurement:
ORP (Oxidation-Reduction Potential), also called redox potential, measures the ability of a solution to oxidize or reduce substances. Positive ORP values indicate oxidizing conditions (common in chlorinated water), while negative values indicate reducing conditions. ORP measurement is critical for monitoring water treatment effectiveness, sanitizer levels, and chemical process control.
Why Choose Double Junction?
The double junction design provides an additional barrier between the reference electrolyte and your sample, preventing contamination and extending probe life—especially important when testing samples with high protein content, heavy metals, sulfides, or other interfering substances that can poison single-junction probes.
Maintenance & Care:
The gel-filled reference system requires minimal maintenance. Store the probe with the protective cap in place. Keep the platinum sensing element clean and free from deposits. Regular calibration with ORP standard solutions ensures optimal accuracy.
Note: Meters, monitors, and controllers sold separately. Regular calibration with ORP standard solutions (e.g., 200 mV, 470 mV) recommended for optimal accuracy.
