Replacement 3" Dial x 6" Stem Thermometer for Dodds & Dwyer Systems
Overview:
The 20813 3" Dial x 6" Stem Mechanical Thermometer is designed for dependable temperature monitoring in HVAC, mechanical, commercial, and industrial applications. Built as a direct aftermarket replacement for compatible Dodds Thermometer units and the Dwyer BTB3605D, this analog thermometer provides accurate temperature readings without requiring batteries, wiring, or electronic components.
Its mechanical bi-metal sensing element delivers consistent, real-time temperature readings across a 0°F to 250°F (20°C to 120°C) operating range. The large 3-inch dial and durable 6-inch stainless steel stem make it well suited for monitoring temperatures in ducts, piping, boilers, hydronic systems, and other equipment where reliable performance is essential.
Key Features:
- Direct aftermarket replacement for Dodds Thermometer models and Dwyer BTB3605D.
- Mechanical bi-metal sensing eliminates the need for batteries or external power.
- Measures temperatures from 0°F to 250°F (20°C to 120°C).
- Large 3-inch analog dial for easy viewing.
- Dual-scale display in Fahrenheit and Celsius.
- Durable 6-inch stainless steel stem resists corrosion and everyday wear.
- Suitable for HVAC, boiler, duct, hydronic, and general industrial temperature monitoring.
- Designed for dependable long-term operation with minimal maintenance.
Important Information:
This is an aftermarket replacement thermometer. Any manufacturer names, trademarks, or part numbers are used solely to identify compatibility. This product is not manufactured by or affiliated with the original equipment manufacturers listed.
FAQs:
Q: Does this thermometer require batteries?
A: No. It uses a mechanical bi-metal sensing element and requires no batteries or external power.
Q: What temperature range does it measure?
A: It measures from 0°F to 250°F (20°C to 120°C).
Q: Is this a direct replacement for Dwyer BTB3605D?
A: Yes. It is designed as a direct aftermarket replacement for the Dwyer BTB3605D.
Q: Is it compatible with Dodds thermometers?
A: Yes. It is designed as a replacement for compatible Dodds Thermometer models.
Q: Can it be used in HVAC systems?
A: Yes. It is suitable for HVAC systems, ductwork, boilers, hydronic heating systems, and other compatible temperature monitoring applications.
Fit / Measuring / Safety Notes:
- Verify the required dial diameter and stem length before ordering.
- Confirm your existing part number matches the listed compatible replacement numbers.
- Ensure the required temperature range is appropriate for your application.
- Install using proper industry practices to avoid damage to the stem or sensing element.
- Do not exceed the rated operating temperature.
- Always follow the equipment manufacturer's installation and maintenance procedures.
Helpful Links:
Product Details / Specifications:
- Model: 20813
- Dial Diameter: 3 inches
- Stem Length: 6 inches
- Temperature Range: 0°F to 250°F (20°C to 120°C)
- Display Type: Analog dual-scale dial
- Sensing Element: Mechanical bi-metal
- Stem Material: Stainless steel
- Power Requirement: None
- Installation Style: Direct stem insertion
- Application: HVAC, boilers, ductwork, hydronic systems, mechanical equipment, industrial temperature monitoring
Direct Replacement for:
- DODDS THERMOMETER
- DWYER BTB3605D
Manufacturer Warranty
Warranty Coverage: 1-Year Limited Warranty
This replacement part from NBK includes a 1-year manufacturer's warranty covering defects in materials and workmanship under normal use.
If you experience an issue within the warranty period, please contact us with your order details so we can assist with evaluation and next steps. Warranty coverage does not apply to damage caused by improper installation, misuse, or external electrical issues.
Estimated Lead Time
Orders typically leave our warehouse within 2–3 business days. After your order ships, delivery time will depend on your location and the carrier's transit schedule.
Processing and shipping times may vary based on product availability and carrier service. If you have any questions about current stock or estimated delivery dates, please contact us before placing your order.
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