Commercial Pool and Spa Supplies
Link Automation, Temperature Sensor for Legacy Controllers (1000 Series)
Link Automation, Temperature Sensor for Legacy Controllers (1000 Series)
SKU:LINK-TEMPA
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The Link Automation Temperature Sensor for Legacy Controllers (1000 Series) (Pool Link / Link Automation) is a dedicated solid-state electronic thermistor/RTD sensor probe engineered specifically for legacy Pool Link 1000 Series commercial water chemistry automation systems. Plumbed directly into an acrylic bypass flow manifold or tapping saddle on the filtration line, it delivers continuous, real-time thermal readings directly to the controller for system display tracking, high/low freeze or overheat safety alarms, and automated temperature-compensated pH/ORP dosing algorithms.
Hardware Architecture & Sensing Elements
Engineered for continuous immersion in chlorinated, brominated, and chemically aggressive commercial water systems:
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Sensing Element: Encapsulated precision thermistor or platinum resistance temperature detector (RTD) element (typically standard $10\text{k}\Omega$ or $100\text{k}\Omega$ NTC thermistor, or standard 2-wire RTD matching legacy 1000 Series input circuitry).
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Protective Thermowell Housing: The sensing bead is encapsulated in a heavy-duty, corrosion-resistant 316 stainless steel, titanium, or chemical-grade polymer body filled with thermally conductive epoxy to ensure rapid heat transfer while isolating electronics from water pressure.
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Shielded Instrumentation Cable: Features a heavy-duty, double-conductor shielded lead with an internal drain wire and a durable PVC/TPE outer jacket that resists ozone, UV degradation, and equipment room chemical vapors.
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Controller Interface: Terminated with stripped and tinned bare-wire leads (or spade terminals) configured for direct connection to the dedicated low-voltage temperature terminal block on the legacy 1000 Series mainboard.
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Process Mounting Fitting: Standard 1/2" NPT or 1/4" NPT external male threads (or smooth gland barrel) designed to fit directly into legacy acrylic bypass flow cells or pipe saddles.
Technical Specifications
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Measurement Range: 32°F to 140°F (0°C to 60°C).
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Measurement Accuracy: $\pm 0.5^\circ\text{F}$ ($\pm 0.3^\circ\text{C}$) across the typical commercial pool operating range (65°F to 105°F).
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Thermal Response Time ($T_{90}$): Typically reaches $90\%$ of stabilized temperature reading within 5 to 15 seconds under active bypass flow.
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Cable Length: Standard 10-foot (approx. 3.0 m) factory jacketed lead (with 20-foot or 30-foot variants for extended panel mounts).
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Maximum Working Pressure: 50 PSI (approx. 3.45 bar) within standard acrylic flow cells.
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Output Signal: Variable resistance/analog voltage curve scaled to legacy 1000 Series firmware calibration curves.
Replacement & Verification Procedure
Restore AC power to the controller and open bypass isolation valves. Compare the controller's displayed water temperature against an independent calibrated handheld thermometer or photometer reading taken at the petcock. Verification: Displayed temperature stabilizes and tracks within $\pm 1^\circ\text{F}$ of the reference thermometer.
Disconnect main AC power to the legacy 1000 Series controller enclosure. Close the bypass supply and return isolation valves to relieve hydraulic pressure in the probe manifold.
Verification: Pressure gauge on the manifold reads 0 PSI and the controller display is unpowered.
Disconnect the two temperature sensor wires from the controller's mainboard terminal strip (noting polarity/terminal designations). Unscrew the sensor probe from the acrylic manifold port counter-clockwise using an open-end wrench.
Verification: Port threads are clean and free of remnants from old Teflon tape or cracked plastic.
Apply 2 to 3 wraps of PTFE thread sealing tape to the new sensor's male NPT threads. Hand-tighten into the flow cell port and snug an additional 1 turn with a wrench. Route the cable into the low-voltage knock-out and secure the leads into the temperature terminals.
Verification: Sensor is seated firmly without leaking under line pressure, and wire terminals are clamped tight.
Restore AC power to the controller and open bypass isolation valves. Compare the controller's displayed water temperature against an independent calibrated handheld thermometer or photometer reading taken at the petcock.
Verification: Displayed temperature stabilizes and tracks within $\pm 1^\circ\text{F}$ of the reference thermometer.
