Description
- Power Supply: 12.5–42 V DC
- Measurement Range: 0–12% conductivity (NaOH equivalent)
- Accuracy: ±0.1% full scale
- Output Signal: 4–20 mA (isolated) + HART protocol
- Communication: HART 7, Modbus RTU (optional)
- Operating Temperature: -20°C to +60°C
- Humidity: Up to 90% non-condensing
- Enclosure Rating: IP65 (NEMA 4X)
- Certifications: FM, CSA, CE
- Response Time: ≤ 2 seconds
- Weight: 1.5 kg
- Dimensions: 200 × 150 × 50 mm
Engineering Pain Points
Industrial processes requiring conductivity measurement often face challenges with fouling, corrosion, and electrode maintenance. Traditional contacting sensors require frequent cleaning and calibration, increasing downtime and labor costs. Electrodeless designs eliminate these issues, but reliable, compatible transmitters with fast spare availability are critical for continuous operations. OEM lead times for legacy FOXBORO models can stretch 4–6 weeks, risking production interruptions in water treatment, chemical, and power applications.
Typical Application Scenarios
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Water & Wastewater Treatment – Boiler & Cooling WaterMonitors conductivity in boiler feedwater and cooling tower systems to prevent scaling and corrosion. Electrodeless design withstands high solids and fouling without performance degradation.
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Chemical Processing – Acid/Alkali ConcentrationMeasures conductivity for precise control of acid and alkali solutions in chemical manufacturing. Ensures product consistency and compliance with process specifications.
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Power Generation – Demineralized Water MonitoringUsed in power plant demineralization systems to verify water purity. Critical for protecting turbines and heat exchangers from mineral deposits.
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Food & Beverage – Clean-in-Place (CIP) SystemsValidates rinse water conductivity in CIP cycles to ensure proper equipment cleaning. Meets FDA and USDA hygiene standards.
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Mining – Process Water & Effluent ControlMonitors conductivity in mining process water and effluent streams. Helps maintain environmental compliance and optimize water reuse.
Real-World Case: Chemical Plant Emergency Replacement
Background: A specialty chemical plant in the Southeast experienced a sudden failure of its FOXBORO conductivity transmitter controlling a caustic neutralization process. The unit was a legacy 870ITEC model, and the OEM quoted a 5-week lead time for a replacement.
Problem: The neutralization process was critical for meeting discharge permit limits. A prolonged outage would result in regulatory fines and production shutdowns, with estimated losses of $450,000 per day.
Solution: The plant’s maintenance team contacted our warehouse, confirming immediate availability of the 870ITEC-AYFNZ-7. We shipped the unit same-day via expedited courier. The team installed the transmitter within 24 hours, using our pre-configured HART settings to minimize calibration time.
Result:
- Total downtime: 30 hours (vs. projected 5 weeks)
- Avoided financial loss: ~$5.6 million
- Post-installation: The electrodeless design reduced maintenance frequency by 70% compared to the previous contacting sensor.
- Follow-up: The plant added two 870ITEC-AYFNZ-7 units to its strategic spare inventory.
- 870ITEC-AYFNZ-7 FOXBORO
- 870ITEC-AYFNZ-7 FOXBORO




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