Product Details
The Foxboro 870ITPH-FYFNZ-7, also cataloged as the 870ITPH-FYFNZ-7 pH/ORP Transmitter, operates as a dedicated hardware component for electrochemical signal conditioning and loop-powered process measurement within industrial control loops. The unit accepts raw potential inputs from pH and oxidation-reduction potential sensors, converting them into standardized proportional outputs across a 12.5 VDC to 42.0 VDC excitation span.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 870ITPH-FYFNZ-7 |
| Brand | Foxboro |
| Origin | Standard Manufacturing Facility |
| Weight | 4.20 lbs (1.91 kg) |
| Dimensions | Standard Field-Mount Enclosure |
| Operating Temp | -20 deg C to 85 deg C (-4 deg F to 185 deg F) |
| Power Consumption | 1 W max |
| Input Range | 0 to 14 pH / ORP |
| Operating Voltage | 12.5 to 42.0 VDC |
| Output Signal | 4-20 mA with digital communication |
| Enclosure Rating | NEMA 4X / IP66 |
Channel-to-Channel Isolation and 4-20 mA Loop Integration
When deployed within Foxboro distributed control architectures, the transmitter interfaces directly with 4-20 mA HART loop protocol loops to deliver real-time chemical concentration feedback to central automation controllers. Internal circuit designs implement galvanic channel-to-channel isolation and cold junction compensation (CJC) equivalents for temperature-compensated electrode measurements, effectively suppressing common-mode electrical noise and ground loops from industrial process media.
Frequently Asked Questions
Q: Does the 870ITPH-FYFNZ-7 support hot-swapping while the loop is energized?
A: No, field wiring must be disconnected and power de-energized before removing or replacing the transmitter unit to prevent signal spikes on the 4-20 mA loop.
Q: How does the unit maintain measurement accuracy under severe electromagnetic interference?
A: The transmitter utilizes internal shielding and optical galvanic isolation across its microprocessor and sensor input stages to ensure stable pH/ORP conversion in high-noise electrical environments.
Field Installation Guidelines
- Mount the transmitter securely to a 2-inch pipe or rigid vertical surface using approved stainless steel bracket hardware, ensuring minimal vibration exposure.
- Terminate all signal and power cables using shielded twisted-pair wire, grounding the shield exclusively at the control system cabinet ground bus to prevent ground loops.
- Ensure weather-tight cable glands and conduit seals are fully tightened to maintain the NEMA 4X / IP66 environmental protection rating against moisture ingress.
- Verify that loop power supply voltage remains strictly within the 12.5 VDC to 42.0 VDC range prior to activating the circuit.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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