---
product_id: 2175291
title: "445713 Big Digit Indoor Outdoor Hygro-Thermometer - Large LCD, Temperature & Humidity Display, Min/Max Tracking, Comfort Level Icons, Wall or Desk Mount, Accurate Digital Sensor"
brand: "extech"
price: "$185"
currency: NZD
in_stock: true
url: https://www.desertcart.nz/products/2175291-445713-big-digit-indoor-outdoor-hygro-thermometer-large-lcd-temperature
store_origin: NZ
region: New Zealand
---

# Humidity range 10-99% RH Fast 500ms response time Dual indoor/outdoor temp display 445713 Big Digit Indoor Outdoor Hygro-Thermometer - Large LCD, Temperature & Humidity Display, Min/Max Tracking, Comfort Level Icons, Wall or Desk Mount, Accurate Digital Sensor

**Brand:** extech
**Price:** $185
**Availability:** ✅ In Stock

## Summary

> 🌿 Stay ahead of your environment with precision you can see!

## Quick Answers

- **What is this?** 445713 Big Digit Indoor Outdoor Hygro-Thermometer - Large LCD, Temperature & Humidity Display, Min/Max Tracking, Comfort Level Icons, Wall or Desk Mount, Accurate Digital Sensor by extech
- **How much does it cost?** $185 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/2175291-445713-big-digit-indoor-outdoor-hygro-thermometer-large-lcd-temperature)

## Best For

- extech enthusiasts

## Why This Product

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

## Key Features

- • **Ready to Use:** Comes with outdoor sensor cable and included AAA battery for immediate setup and continuous monitoring.
- • **Memory Recall Function:** Max/Min readings stored and resettable to track climate trends effortlessly.
- • **Versatile Installation:** Includes built-in stand and wall mount bracket for flexible placement anywhere in your space.
- • **Dual Display Convenience:** Simultaneously shows indoor and outdoor conditions for instant environmental awareness.
- • **Precision Climate Tracking:** Accurately monitors temperature from -10 to 60°C and humidity from 10 to 99% RH with ±1°C and ±5% RH accuracy.

## Overview

The Extech 445713 Big Digit Indoor/Outdoor Hygro-Thermometer delivers fast, accurate temperature and humidity readings with a clear dual display. Designed for both indoor and outdoor use, it features a memory function for max/min values, flexible mounting options, and comes ready to operate with an included outdoor sensor and battery. Ideal for professionals who demand reliable environmental data at a glance.

## Description

445713 Big Digit Indoor Outdoor Hygro-Thermometer - Large LCD, Temperature & Humidity Display, Min/Max Tracking, Comfort Level Icons, Wall or Desk Mount, Accurate Digital Sensor

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Extech |
| Special Feature | Alarm |
| Color | green/white |
| Age Range (Description) | Adult |
| Included Components | Built-in stand |
| Outer Material | Plastic |
| Display Type | Digital |
| Connectivity Technology | Wired |
| Product Care Instructions | Wipe Clean |
| Unit Count | 1.0 Count |
| Power Source | Battery Powered |
| Model Name | 445713 |
| Number of Batteries | 1 AAA batteries required. (included) |
| Item Length | 109 Millimeters |
| Upper Temperature Rating | 60 Degrees Celsius |
| Response Time | 500 Milliseconds |
| Reusability | Reusable |
| Resolution | ±0.1°F or ±0.1°C |
| Style | 445713 |
| Indoor/Outdoor Usage | Outdoor |
| UPC | 793950457139 885510089208 |
| Global Trade Identification Number | 00793950457139 |
| Manufacturer | Extech |
| Part Number | 445713 |
| Item Weight | 6.3 ounces |
| Item model number | 445713 |
| Batteries | 1 AAA batteries required. (included) |
| Is Discontinued By Manufacturer | No |
| Material | Plastic |
| Item Package Quantity | 1 |
| Number Of Pieces | 1 |
| Measurement Accuracy | +/-0.5% |
| Special Features | Alarm |
| Batteries Included? | Yes |
| Batteries Required? | No |
| Battery Cell Type | Alkaline |
| Warranty Description | 1 Year |

## Product Details

- **Brand:** Extech
- **Special Feature:** Alarm
- **Color:** green/white
- **Age Range (Description):** Adult
- **Included Components:** Built-in stand
- **Outer Material:** Plastic
- **Display Type:** Digital
- **Connectivity Technology:** Wired
- **Product Care Instructions:** Wipe Clean
- **Unit Count:** 1.0 Count

## Images

![445713 Big Digit Indoor Outdoor Hygro-Thermometer - Large LCD, Temperature & Humidity Display, Min/Max Tracking, Comfort Level Icons, Wall or Desk Mount, Accurate Digital Sensor - Image 1](https://m.media-amazon.com/images/I/71YKBQLGkbL.jpg)

## Questions & Answers

**Q: What diameter is the probe?**
A: The probes diameter is .575 inches measured with a caliper, a little over 9/16 inch.

**Q: Has anyone tested RH accuracy? +/- 5% accuracy for humidity seems a rather large margin of potential error.**
A: Just checked around: The best professional relative humidity meters measure +/-2%. Accuracy is best in the center of the range (50%) and falls off considerably at either end. These very accurate meters (such as the Cooper Atkins Model SRH77A) cost over five hundred dollars. So +/-5% is a great deal for about thirty dollars.

**Q: Is this item calibratable?**
A: No! You can not calibrate. Do not buy! I am surprised this thing is still for sale. I returned mine a long time ago all it does is represent a bunch of numbers that are totally inaccurate.

**Q: water proof**
A: The exterior probe is water proof, but the main portion of the thermometer with the display is not.

## Frequently Bought Together

- Extech 445713 Big Digit Indoor/Outdoor Hygro-Thermometer
- Extech EXTRH300 EXTECH RH300 - Humidity Meter with Dew Point
- Extech 401014A Big Digit in/Outdoor Thermometer with Alarm

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**Shop now:** [https://www.desertcart.nz/products/2175291-445713-big-digit-indoor-outdoor-hygro-thermometer-large-lcd-temperature](https://www.desertcart.nz/products/2175291-445713-big-digit-indoor-outdoor-hygro-thermometer-large-lcd-temperature)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-03-08*