---
product_id: 2166671
title: "Extech 445815 Hygro-Thermometer Humidity Alert with Dew Point Programmable Alarm warns of High Humidity Conditions"
brand: "extech instruments"
price: "₨54664"
currency: LKR
in_stock: true
reviews_count: 13
category: "Extech"
url: https://www.desertcart.lk/products/2166671-extech-445815-hygro-thermometer-humidity-alert-with-dew-point-programmable
store_origin: LK
region: Sri Lanka
---

# Programmable Humidity Alarm 10-99% RH Range ±1°C Temp Accuracy Extech 445815 Hygro-Thermometer Humidity Alert with Dew Point Programmable Alarm warns of High Humidity Conditions

**Brand:** extech instruments
**Price:** ₨54664
**Availability:** ✅ In Stock

## Summary

> 💧 Stay dry, stay sharp — never miss a moisture moment!

## Quick Answers

- **What is this?** Extech 445815 Hygro-Thermometer Humidity Alert with Dew Point Programmable Alarm warns of High Humidity Conditions by extech instruments
- **How much does it cost?** ₨54664 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/2166671-extech-445815-hygro-thermometer-humidity-alert-with-dew-point-programmable)

## Best For

- extech instruments enthusiasts

## Why This Product

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

## Key Features

- • **Remote 18" Probe:** Measure hidden or hard-to-reach spots behind walls with ease.
- • **Triple Large Display:** Instantly monitor humidity, temperature & dew point at a glance.
- • **Customizable Alarm Alerts:** Stay ahead of mold risks with audible & visual humidity warnings.
- • **Versatile Mounting Options:** Desk stand or wall bracket included for flexible placement.
- • **Reliable & Energy Efficient:** Long-lasting AAA battery power with ±4% RH accuracy ensures trustable readings.

## Overview

The Extech 445815 Hygro-Thermometer combines precise temperature (±1°C) and humidity (10-99% RH) monitoring with a programmable alarm to alert you of critical moisture levels. Featuring a large triple display, an 18-inch remote probe, and versatile mounting options, it’s engineered to protect your space from mold and humidity damage with reliable, battery-powered performance.

## Description

From the Manufacturer The Extech 445815 Humidity Meter with Alarm and Remote Probe is an attractive humidity meter, which features large triple display of relative humidity, temperature and dew point. Built-in stand for setting on a desk or can be mounted to a wall with included bracket. A visual and audible alarm warns when the humidity level goes above or below the adjustable set point. Also stores the maximum and minimum reading. Remote probe extends 18" for measuring behinds walls. Ideal for use in humid areas where mold can become a problem. Comes complete with built-in stand, wall mount bracket, and 2- AAA batteries.

Review: A fine instrument that is accurate, well made, and reliable. - I am glad I purchased this humidity & temperature indicator before I purchased a humidifier. I found out that I did not need a humidifier ( found out the bedroom is 45% to 50% RH ). The unit is well made, does not run through batteries, & I am happy with it.
Review: Nice Humidly Alert and Temp Display - I set mine up for my T room. With the nice large LCD readout at a quick glance I can see what each enclosure's humidity and temperature is. I don't use the alarm features since I have a room humidifier control system that has alerts for the overall room humidity. Overall, this is a nice, easy to ready, humidity and Temperature display + options with audible alarms for Max and Minimum thresholds. I have one sitting on each of my enclosures with the probe inserted to measure humidity. Works Great. Would like to have seen included a probe attachment; such as a suction cup for glass and or a hook for wire enclosures.

## Features

- General purpose, standard size glass bulb pH sensing electrode
- Rugged, polycarbonate construction
- Glass pH sensing bulb surrounded by protective teeth
- 0 to 14pH range
- 0 to 80-Degrees C operating temperature

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000GFCN1I |
| Batteries | 1 AAA batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Battery Description | Alkaline |
| Best Sellers Rank | #226,423 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #29 in Humidifier Humidity Meters #506 in Humidifier Accessories |
| Brand | Extech Instruments |
| Customer Reviews | 4.4 4.4 out of 5 stars (623) |
| Date First Available | June 21, 2006 |
| Description Pile | Alkaline |
| Global Trade Identification Number | 00793950458150, 04016138375534 |
| Included Components | Built-in Stand, Wall Mount Bracket, 1 AAA battery |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 6.7 ounces |
| Item model number | 445815 |
| Manufacturer | Extech |
| Measurement Accuracy | Temp: ±1°C / RH: ±4% |
| Mounting Type | Wall Mount |
| Number Of Pieces | 1 |
| Operating Humidity | 10 to 99% RH |
| Part Number | 445815 |
| Power Source | Battery Powered |
| Product Dimensions | 3.9 x 0.78 x 4.3 inches |
| Shape | Rectangular |
| Size | Dew Point Hygro-Thermometer |
| Style | With Alarm |
| Temperature Accuracy | 1 degree Celsius |
| UPC | 885866191235 793950458150 |
| Upper Temperature Rating | 140 Degrees Fahrenheit |
| Voltage | 1.5 Volts |
| Warranty Description | 1 Year Parts and Labor |

## Product Details

- **Battery Description:** Alkaline
- **Brand:** Extech Instruments
- **Item Weight:** 0.19 Kilograms
- **Mounting Type:** Wall Mount
- **Operating Humidity:** 10 to 99% RH

## Images

![Extech 445815 Hygro-Thermometer Humidity Alert with Dew Point Programmable Alarm warns of High Humidity Conditions - Image 1](https://m.media-amazon.com/images/I/61IzukYZWCL.jpg)

## Questions & Answers

**Q: Is two degrees hotter normal for this thermometer.  The humidity is good but checkiing normal for the product.**
A: Not normal. Accurate to within a half-degree when calibrated.

**Q: How do we select either of the 2 Certificate of Traceablitity options?  Or is this already in the box?**
A: The product does not come with a certificate & it's a hassle to obtain.  The Extech website notes the following:Is my meter calibrated out of the box? How often should it be calibrated? Does it come with a calibration certificate? How & where can I get my meter calibrated?All Extech products are factory calibrated prior to shipment. This calibration is valid for one year. An annual factory calibration is recommended. Extech does not include calibration certificates with our products. NIST calibrations with data can be purchased for an additional charge for most products. To send your meter to be NIST calibrated please contact our return department for a return authorization number and other return information.

**Q: Can it display the temperature in Celsius unit?**
A: Yes! Good question, and I did not know, so I dug out my instructions. I am now looking at those and my unit and there is a switch in the battery compartment below the battery for degrees F and degrees C. Using this, I have 78.6 F showing as 25.9 C. BTW, I'm actually considering getting another one for my car and work. It will need some protection, like a plastic sandwich box with some paper towel padding, but that will do it for me. Hope you enjoy yours as much as I like mine.

**Q: May i know does this item come together with a calibration certificate?**
A: The calibration certificate is not included; it can be ordered together with 17030-28 calibration.

## Customer Reviews

### ⭐⭐⭐⭐⭐ A fine instrument that is accurate, well made, and reliable.
*by S***D on October 27, 2025*

I am glad I purchased this humidity & temperature indicator before I purchased a humidifier. I found out that I did not need a humidifier ( found out the bedroom is 45% to 50% RH ). The unit is well made, does not run through batteries, & I am happy with it.

### ⭐⭐⭐⭐⭐ Nice Humidly Alert and Temp Display
*by D***K on September 16, 2013*

I set mine up for my T room. With the nice large LCD readout at a quick glance I can see what each enclosure's humidity and temperature is. I don't use the alarm features since I have a room humidifier control system that has alerts for the overall room humidity. Overall, this is a nice, easy to ready, humidity and Temperature display + options with audible alarms for Max and Minimum thresholds. I have one sitting on each of my enclosures with the probe inserted to measure humidity. Works Great. Would like to have seen included a probe attachment; such as a suction cup for glass and or a hook for wire enclosures.

### ⭐⭐⭐⭐⭐ Dew point display is helpful
*by J***S on July 13, 2008*

Dew point display was the feature that made me buy this product. It has worked well, has a long battery life, and is accurate. The dew point shows how much humidity I can safely add in the winter without condensation forming on the windows. It also indicates the efficiency of the air conditioner in the summer. "Delta T" (the change in temperature, the temperature of the intake air minus the temperature of the chilled air) shows how much heat the air conditioner is removing. Since the a/c also removes moisture, the dew point tends to be the same as the evaporator plates, which is the temperature of the chilled air. (Unless you live in a dry climate.) So, just noting the difference between the ambient air and dew point indicates the efficiency. It is amazing how much more efficient the a/c is in the morning, when the outside temperature is in the 70s versus how little chilling happens in the afternoon in the 90s. I quit running the a/c in the mid afternoon, and save a few buck on the electricity. It is a fine product. Spread the word about the dew point!

## Frequently Bought Together

- Extech Digit Thermometer
- Extech 445580 Humidity and Temperature Pen Sized Meter with Pocket Clip

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-03-16*