523769 Pentair IntelliChlor® Plus & LT Replacement Sensor Board / Sensor Module Kit

523769 Pentair IntelliChlor® Plus & LT Replacement Conductivity, Temperature, Flow Sensor Sensor Module Kit

ELECTRICAL ITEM, FINAL SALE, NOT RETURNABLE.

Restore accurate salt readings and get your salt chlorinator back online — fast. The Pentair IntelliChlor Plus & LT Replacement Sensor (Mfg. Part No. 523769) is a genuine Pentair Sensor Module Replacement Kit engineered for the modular IntelliChlor Plus and IntelliChlor LT family of salt chlorine generators. When your cell starts throwing false “Inspect Cell,” “Low Salt,” or salinity-reading faults, a worn sensor module is the most common culprit — and this kit lets you fix it in minutes instead of replacing the entire salt cell.

This is the part that makes the new IntelliChlor generation worth owning: thanks to Pentair’s modular design, swapping the sensor module is over 50% faster than servicing a first-generation IntelliChlor cell. One genuine part, one quick service call, and your customer’s saltwater pool is reading accurately again.

What This Part Is — and Why It Matters

The 523769 is the integrated sensor module at the heart of every IntelliChlor Plus and LT salt chlorine generator. It combines all three sensors in a single unit:

• Conductivity sensor — reads pool salinity. Pentair’s redesigned conductivity sensor is 98% as accurate as a laboratory-grade salinity meter, so the cell reports a salt level you can trust.
• Temperature sensor — monitors local water temperature at the cell for accurate chlorine output and cold-water protection.
• Flow sensor — confirms adequate water flow (the SCG needs a minimum of 25 GPM) before producing chlorine, protecting the cell and your equipment.

Because all three sensors live in one replaceable module, a single part number restores full sensing accuracy — no guesswork, no full-cell replacement. The kit also includes the sensor module O-ring for a clean, leak-free reinstall.

Compatible Models — Fits the Entire IntelliChlor Plus & LT Lineup

This sensor module is designed for all models of the IntelliChlor Plus and IntelliChlor LT salt chlorine generators:

• IntelliChlor LT15 (15,000-gallon)
• IntelliChlor LT25 (25,000-gallon)
• IntelliChlor Plus30 (30,000-gallon)
• IntelliChlor Plus40 (40,000-gallon)
• IntelliChlor Plus60 (60,000-gallon)

Important compatibility note: This part fits the new modular Plus & LT generation only. It does NOT fit the legacy first-generation IntelliChlor cells (IC15, IC20, IC40, IC60) or the iChlor® series, which use different, non-modular sensor designs. If you are servicing an older IC-series or iChlor cell, you’ll need the part specific to that model.

Key Benefits

• Genuine Pentair OEM part — guaranteed fit, performance, and reliability for IntelliChlor Plus & LT systems.
• Over 50% faster service — modular design means quick sensor swaps versus replacing a whole legacy cell.
• Lab-grade salinity accuracy — the upgraded conductivity sensor reads within 98% of a laboratory salinity meter.
• 3-in-1 sensing — conductivity, temperature, and flow in one integrated module.
• O-ring included — everything needed for a clean, sealed reinstallation comes in the kit.
• Cost-saving repair — renew sensor accuracy without buying a complete salt cell.

Common Symptoms That Point to a Worn Sensor Module

• False or fluctuating “Low Salt” / “SYS OFF LOW SALT” warnings when salt is actually correct (target 3,600 ppm).
• Salinity readings that don’t match a separate salt test.
• Inaccurate water-temperature display at the cell.
• Flow faults or the cell failing to confirm water flow despite good circulation.
• General loss of chlorine output traced to bad sensor data rather than worn cell blades.

Related Pentair IntelliChlor Plus & LT Parts

• 523769 (PAC-451-3407) — Replacement Sensor Module / Sensor Board — this product
• 523771 — Sensor Module Replacement O-Ring
• 523747 — IntelliChlor LT25 Salt Chlorine Generator (25K)
• 523730 — IntelliChlor Plus30 Salt Chlorine Generator (30K)
• 523735 — IntelliChlor Plus40 Salt Chlorine Generator (40K)
• 523738 — IntelliChlor Plus60 Salt Chlorine Generator (60K)
• 523753 — IntelliChlor LT15 Power Pack
• 520590 / PC100 — IntelliChlor Power Center

Also Known As / Common Search Terms

Customers also search for this part as: Pentair 523769, PAC-451-3407, IntelliChlor Plus sensor board, IntelliChlor LT sensor board, IntelliChlor sensor module replacement kit, IntelliChlor Plus30 sensor, IntelliChlor LT25 sensor, Pentair salt cell sensor board, IntelliChlor conductivity sensor, and IntelliChlor flow/temperature sensor module.

Frequently Asked Questions

Which IntelliChlor units does 523769 fit?
It fits all IntelliChlor Plus and LT salt chlorine generators: LT15, LT25, Plus30, Plus40, and Plus60. It does not fit legacy IC15/IC20/IC40/IC60 or iChlor cells.

What sensors are in the module?
All three are integrated into one unit: conductivity (salt level), temperature, and flow.

Does the kit include the O-ring?
Yes. The sensor module replacement kit (523769) includes the O-ring. A standalone replacement O-ring is also available as 523771.

Will replacing the sensor module fix a false “Low Salt” warning?
Often, yes. When salinity is confirmed correct (around 3,600 ppm) but the cell still reports low or fluctuating salt, a worn or failed sensor module is a leading cause, and this part restores accurate readings.

Is this a genuine Pentair part?
Yes — this is an authentic Pentair OEM sensor module replacement, ensuring correct fit and performance with IntelliChlor Plus & LT systems.

Order the Pentair IntelliChlor Plus & LT Sensor Board (523769) Today

Get accurate salt readings and reliable chlorine production back with a genuine Pentair IntelliChlor Plus & LT Replacement Sensor Module (523769). Fast, modular service for LT15, LT25, Plus30, Plus40, and Plus60 salt chlorine generators — in stock and ready to ship. Keep one on the truck so you’re never caught without the part that brings a salt system back to life.