---
product_id: 77112611
title: "Tel-Tru Bi-Metal Process Grade Thermometer, 3\" Dial, 1/2\" Npt Back Connection, 0.250\" Diameter x 2.5\" Long Stem, 50/500F, +/- 1% Full Span Accuracy"
brand: "tel-tru"
price: "$9.90"
currency: USD
in_stock: false
reviews_count: 2
url: https://www.desertcart.us/products/77112611-tel-tru-bi-metal-process-grade-thermometer-3-dial-1
store_origin: US
region: United States of America
---

# +/- 1% Accuracy 50/500°F Range Durable Stainless Steel Tel-Tru Bi-Metal Process Grade Thermometer, 3" Dial, 1/2" Npt Back Connection, 0.250" Diameter x 2.5" Long Stem, 50/500F, +/- 1% Full Span Accuracy

**Brand:** tel-tru
**Price:** $9.90
**Availability:** ❌ Out of Stock

## Summary

> 🔍 Precision Meets Durability in Every Degree!

## Quick Answers

- **What is this?** Tel-Tru Bi-Metal Process Grade Thermometer, 3" Dial, 1/2" Npt Back Connection, 0.250" Diameter x 2.5" Long Stem, 50/500F, +/- 1% Full Span Accuracy by tel-tru
- **How much does it cost?** $9.90 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/77112611-tel-tru-bi-metal-process-grade-thermometer-3-dial-1)

## Best For

- tel-tru enthusiasts

## Why This Product

- Trusted tel-tru brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Crafted with all-welded 303/304 stainless steel housing for unmatched durability.
- • **Chemical Resistance:** Corrosion-resistant design ensures longevity in harsh environments.
- • **American Made Quality:** Proudly manufactured in the USA with an 8-year warranty for peace of mind.
- • **Precision Performance:** Experience +/- 1% full span accuracy for reliable readings.
- • **User-Friendly Calibration:** Side calibration reset prevents tampering, keeping your measurements precise.

## Overview

The Tel-Tru Bi-Metal Process Grade Thermometer is a robust and reliable instrument designed for various industrial applications, featuring a 3-inch dial, a 1/2-inch NPT back connection, and a temperature range of 50 to 500°F. With an impressive +/- 1% full span accuracy and a durable stainless steel construction, this thermometer is built to withstand the rigors of food and beverage processing, HVAC, and more. Its hermetic seal ensures it remains dustproof and leakproof, while the user-friendly calibration feature enhances its usability. Backed by an 8-year warranty, this thermometer is a trusted choice for professionals.

## Description

The Model GT300R is the best 3" dial back connected thermometer for heavy duty applications. The unique stem groove to identify the min. immersion for accurate reading. Glass window that is fully gasketed.

## Features

- Commonly used in industrial, pulp and paper, food and beverage processing, HVAC, and OEM applications
- Durable and reliable, with an all welded 303/304 stainless steel housing. Corrosion resistant to most chemicals. Hermetic seal, dustproof and leakproof IP65 & NEMA 4x
- 90 degree Back angle, rear threaded connection design
- Accuracy +/-1% full span per ASME B40.3 Grade A. The calibration reset is located on the side of the case benefiting the calibrator, and requiring an Allen wrench to discourage inadvertent tampering
- Manufactured in USA, with an 8 year warranty

## Product Details

- **Brand:** Tel-Tru
- **Special Feature:** 304 stainless steel
- **Age Range (Description):** Adult
- **Outer Material:** Stainless Steel
- **Specification Met:** Nema,oem
- **Display Type:** Analog
- **Connectivity Technology:** Wired
- **Product Care Instructions:** Wipe Clean
- **Unit Count:** 1.0 Count
- **Item Length:** 2.5 Inches

## Images

![Tel-Tru Bi-Metal Process Grade Thermometer, 3" Dial, 1/2" Npt Back Connection, 0.250" Diameter x 2.5" Long Stem, 50/500F, +/- 1% Full Span Accuracy - Image 1](https://m.media-amazon.com/images/I/31wTEZHXC0L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good reliable product
*by A***R on February 23, 2025*

Used for my smoker and is accurate within a degree or so.

### ⭐⭐⭐⭐⭐ Excellent
*by S***T on October 29, 2024*

Well made and easily calibrated. Accurate

## Frequently Bought Together

- Tel-Tru Bi-Metal Process Grade Thermometer, 3" Dial, 1/2" Npt Back Connection, 0.250" Diameter x 2.5" Long Stem, 50/500F, +/- 1% Full Span Accuracy
- Steel 1/2" NPT Weld On Stepped Bung Female Nut Threaded Weldable .5 in. NPT for Automotive, Industrial, Plumbing, Barbecue Themometer Installation Kit Oil Pan Racing

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**Shop now:** [https://www.desertcart.us/products/77112611-tel-tru-bi-metal-process-grade-thermometer-3-dial-1](https://www.desertcart.us/products/77112611-tel-tru-bi-metal-process-grade-thermometer-3-dial-1)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-01*