---
product_id: 611404322
title: "UEi PDT655 Differential Temperature Folding Pocket Thermometer, HVAC Digital Thermometer with Backlit Display and Magnetic Mount, Measures -58 to 572Ã‚°F"
brand: "uei test instruments"
price: "$247"
currency: NZD
in_stock: false
reviews_count: 5
category: "U Ei Test Instruments"
url: https://www.desertcart.nz/products/611404322-uei-pdt655-differential-temperature-folding-pocket-thermometer-hvac-digital-thermometer
store_origin: NZ
region: New Zealand
---

# Built-in magnetic mount 500ms fast response Temp range -58 to 572°F UEi PDT655 Differential Temperature Folding Pocket Thermometer, HVAC Digital Thermometer with Backlit Display and Magnetic Mount, Measures -58 to 572Ã‚°F

**Brand:** uei test instruments
**Price:** $247
**Availability:** ❌ Out of Stock

## Summary

> 🌟 Stay cool, measure smarter — the ultimate HVAC sidekick!

## Quick Answers

- **What is this?** UEi PDT655 Differential Temperature Folding Pocket Thermometer, HVAC Digital Thermometer with Backlit Display and Magnetic Mount, Measures -58 to 572Ã‚°F by uei test instruments
- **How much does it cost?** $247 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/611404322-uei-pdt655-differential-temperature-folding-pocket-thermometer-hvac-digital-thermometer)

## Best For

- uei test instruments enthusiasts

## Why This Product

- Trusted uei test instruments brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Hands-Free Efficiency:** Magnetic mount lets you attach the device to ducts for effortless, hands-free monitoring.
- • **Read Anytime, Anywhere:** Large backlit digital display ensures clear readings even in dim basements or attics.
- • **Pocket-Sized Powerhouse:** Compact folding probe fits tight spaces and slips easily into your toolkit.
- • **Speed Meets Reliability:** Updates temperature every second with a rapid 500ms response time—never miss a change.
- • **Precision at Your Fingertips:** Measures differential temps (T1 - T2) for HVAC pros who demand accuracy.

## Overview

The UEi PDT655 is a professional-grade differential folding pocket thermometer designed for HVAC technicians and field professionals. It measures temperatures from -58 to 572°F (-50 to 300°C) with a fast 500ms response time and calculates differential temperature (T1 - T2). Featuring a large backlit digital display, a foldable probe for tight spaces, and a built-in magnet for hands-free use, it delivers quick, accurate readings in any environment. Compact yet robust, it’s engineered for precision, convenience, and durability in demanding work conditions.

## Description

Uei PDT655 Temperature measurement range: -58 to 572°F (-50 to 300°C)Differential temperature calculationsBack-fold out probe - reads open or closedMin/Max, Auto Power Off, Low Battery Warning, Built-in MagnetLarge, easy-to-read backlit display in °F or °C Large Display Differential Pocket Thermometer The UEi PDT655 Differential Folding Pocket Thermometer has a temperature measurement range of -58 to 572°F (-50 to 300°C). The PDT655 calculates differential temperature and will display temperature at either °F or °C on the large, easy-to-read backlit display. The UEi PDT655 features a back-fold out probe and will take readings whether it is open or closed.

Review: The device is somewhat on the larger size, but for most users this is a plus. Its length is 6 inches and the width is 1.5 and it about ¾ inch thick. It will fit in a pocket but there will be no hiding it there, too long for that. However, it’s actually about ½ inch shorter that the Samsung phone I carry. The readout numbers are ¾ high and easy to read from 10ft away with good lighting. The display does light up, but only for about 4 seconds, just long enough to see the number if you’re in a dark basement or attic. The probe length is 5 inches and has enough mechanical resistance that it holds the position as you place it into a vent or hole. I was able to hang it onto a vertical return grill by the probe only, since in this case the grill was aluminum. The built-in magnets will hold it nicely on a flat metal area but probably not on a round duct. On those you could easily hang it by the probe though. It uses 1 CR2032 battery which helps keep the weight down. It’s a common enough battery that big box and drug stores sell them and they are cheap. It will self-power off after one hour, a nice feature, but it also means that any readings you have also disappear. It updates very quickly and follows the temp rise in a duct very near real time. It followed the rise I saw with my Fluke thermocouple and I was impressed with that. Accuracy seems reasonable and matches up nicely with other thermometers that I believe to be accurate. See photo
Review: I do air conditioning and this is a great thermometer keeps track of the high and low temperatures and read out is very big numbers

## Features

- DIFFERENTIAL TEMPERATURE: PDT655 can store temperature readings and measure differential temperature by Measuring (T1 - T2)
- VERSATILE: The PDT655 fits in your pocket and can take readings in tight spaces with a folding probe.
- EASY-TO-READ: The PDT655 comes equipped with a large digital display for easy reading. There is also a backlight to illuminate display in dark spaces.
- HANDS-FREE: The PDT655 includes a built in magnet that enables hands free operation for easy measurement of ducts and vents
- FAST READING: The PDT655 provides quick readings with a temperature probe that refreshes every second.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0938HPW8R |
| Age Range (Description) | Adult |
| Are batteries included? | No |
| Brand | UEi Test Instruments |
| Colour | Multicoloured |
| Country of Origin | USA |
| Customer Reviews | 4.4 4.4 out of 5 stars (307) |
| Date First Available | 1 June 2022 |
| Display Type | Digital |
| Global Trade Identification Number | 00053533508543 |
| Included Components | PDT655 |
| Indoor/Outdoor Usage | Indoor |
| Item Length | 6 Inches |
| Item Weight | 90.7 g |
| Item model number | PDT655 |
| Manufacturer | UEI. |
| Model Name | Differential Folding Pocket Thermometer w/ T1/T2 |
| Model number | PDT655 |
| Net Quantity | 1 Count |
| Number of Memory Sticks | 1 |
| Outer Material | Plastic |
| Power Source | See Product Details |
| Product Care Instructions | Wipe Clean |
| Response Time | 500 Milliseconds |
| Reusability | Reusable |
| Special Feature | Backlit |
| Specific Product Use | Professional |
| Specification Met | CE |
| Style | Foldable UV/White Beam |
| UPC | 053533508543 535335085434 |
| Upper Temperature Rating | 572 Degrees Fahrenheit |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** UEi Test Instruments
- **Colour:** Multicoloured
- **Included Components:** PDT655
- **Special Feature:** Backlit

## Images

![UEi PDT655 Differential Temperature Folding Pocket Thermometer, HVAC Digital Thermometer with Backlit Display and Magnetic Mount, Measures -58 to 572Ã‚°F - Image 1](https://m.media-amazon.com/images/I/31ItvoWe59S.jpg)
![UEi PDT655 Differential Temperature Folding Pocket Thermometer, HVAC Digital Thermometer with Backlit Display and Magnetic Mount, Measures -58 to 572Ã‚°F - Image 2](https://m.media-amazon.com/images/I/41JoOKL26XL.jpg)
![UEi PDT655 Differential Temperature Folding Pocket Thermometer, HVAC Digital Thermometer with Backlit Display and Magnetic Mount, Measures -58 to 572Ã‚°F - Image 3](https://m.media-amazon.com/images/I/41d7ZiWKRRL.jpg)
![UEi PDT655 Differential Temperature Folding Pocket Thermometer, HVAC Digital Thermometer with Backlit Display and Magnetic Mount, Measures -58 to 572Ã‚°F - Image 4](https://m.media-amazon.com/images/I/41g8A4ZvhTS.jpg)
![UEi PDT655 Differential Temperature Folding Pocket Thermometer, HVAC Digital Thermometer with Backlit Display and Magnetic Mount, Measures -58 to 572Ã‚°F - Image 5](https://m.media-amazon.com/images/I/41kS2GL-6XL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***E on 1 February 2024*

The device is somewhat on the larger size, but for most users this is a plus. Its length is 6 inches and the width is 1.5 and it about ¾ inch thick. It will fit in a pocket but there will be no hiding it there, too long for that. However, it’s actually about ½ inch shorter that the Samsung phone I carry. The readout numbers are ¾ high and easy to read from 10ft away with good lighting. The display does light up, but only for about 4 seconds, just long enough to see the number if you’re in a dark basement or attic. The probe length is 5 inches and has enough mechanical resistance that it holds the position as you place it into a vent or hole. I was able to hang it onto a vertical return grill by the probe only, since in this case the grill was aluminum. The built-in magnets will hold it nicely on a flat metal area but probably not on a round duct. On those you could easily hang it by the probe though. It uses 1 CR2032 battery which helps keep the weight down. It’s a common enough battery that big box and drug stores sell them and they are cheap. It will self-power off after one hour, a nice feature, but it also means that any readings you have also disappear. It updates very quickly and follows the temp rise in a duct very near real time. It followed the rise I saw with my Fluke thermocouple and I was impressed with that. Accuracy seems reasonable and matches up nicely with other thermometers that I believe to be accurate. See photo

### ⭐⭐⭐⭐⭐ Review
*by T***Y on 1 July 2025*

I do air conditioning and this is a great thermometer keeps track of the high and low temperatures and read out is very big numbers

### ⭐⭐⭐⭐ Review
*by D***. on 22 August 2025*

It works good but it is much larger than the older ones definitely can’t keep two in your shirt picked anymore. Also one of them the back light does not work

## Frequently Bought Together

- UEi PDT655 Differential Temperature Folding Pocket Thermometer, HVAC Digital Thermometer with Backlit Display and Magnetic Mount, Measures -58 to 572°F
- UEi Test Instruments PDT650 Folding Pocket Digital Thermometer,Yellow
- WGGE WG-026 10 Pieces and 5 Colors Test Lead Set & Alligator Clips,20.5 inches / 22 AWG Copper Wire. The Clips soldered and Stamped to The Wires. (1 Pack)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-26*