Gas Water Heater Parts High Efficiency Thermistor Temperature Sensor Gas Water Heater Control Probe
Manufactured with medical-grade epoxy encapsulation and corrosion-resistant stainless steel sheath, the probe maintains measurement stability even under continuous exposure to high-temperature water flow and mineral deposits. Its fast-response NTC thermistor element achieves 95% step response within 8 seconds, while the hermetically sealed construction prevents moisture ingress and ensures long-term calibration integrity. Each unit undergoes individual thermal cycling validation to guarantee consistent resistance-temperature characteristics across the operational range.
Features
-
High-Precision NTC Thermistor – ±1% resistance tolerance at 25°C ensures accurate temperature tracking
-
Rapid Response Design – 8-second response time to 95% of temperature changes
-
Corrosion-Resistant Construction – 304 stainless steel sheath with IP68-rated epoxy seal
-
Wide Temperature Range – Operational from -30°C to 150°C covering all water heater scenarios
-
Direct OEM Replacement – Compatible with major brands including Rinnai, Noritz, and Bosch
-
Safety-Enhanced Design – Built-in fault detection capability for open/short circuit conditions
-
Easy Installation – Standard M4 thread with 35mm insertion depth fits most mounting ports
Product Parameter
| Parameter | Specification |
|---|---|
| Sensor Type | NTC Thermistor (Negative Temperature Coefficient) |
| Resistance Value | 10kΩ at 25°C (B Value: 3950K ±1%) |
| Temperature Range | -30°C to 150°C (Operational) |
| Accuracy | ±0.5°C at 50°C, ±1°C across full range |
| Response Time (τ) | 8 seconds in water (95% response) |
| Probe Material | 304 Stainless Steel (6mm diameter) |
| Insertion Length | Standard 35mm (Custom lengths available) |
| Thread Specification | M4 x 0.7mm (Standard hex nut installation) |
| Wire Configuration | 2-wire, 1m length (200°C rated silicone cable) |
| Protection Rating | IP68 (Submersible up to 2m, 24 hours) |
FAQ
Q1: Difference from thermocouple?
Higher accuracy (±0.5℃), faster response, designed for electronic temperature control systems.
Q2: Compatibility?
Suitable for electronically controlled gas water heaters (post-2005). Verify original sensor resistance is 10kΩ.
Q3: Can wire be shortened?
Yes, but must be sealed with waterproof heat shrink tubing. Do not extend.
Q4: Service life?
5–7 years in normal water; 3–4 years in hard water areas with regular inspection.
Q5: Common causes of failure?
Scale buildup, wire damage, seal degradation, voltage fluctuations.