I didn't see calibration mentioned in the instructions and there's no calibrate button, is the humidity sensor fairly accurate?

Cannot be calibrated. I bought this and 2 cheaper adjustable AcuRite units. In addition, I have an older ThermoPro indoor/outdoor and two Honeywell smart thermostats that are supposed to be able to control a Honeywell dehumidifier. Six readings ranging from 38% on the indoor/outdoor for it's indoor reading; THIS ThermoPro and one of the AcuRites at 43%, the other AcuRite at 42%, and the Honeywell thermostats at 44% and 45% (although they're on different floors--the 44% was nearer my three new units). So, six opinions from 38% to 44% (ignoring the Honeywell on the other floor), with two at 43%.

Does the backlight stay on constantly or does it shut off and u can turn it on if you need?

When you press the lightbulb icon it activates the backlight and will automatically shut off in around 15 seconds giving a time to view the display, or if you press the lightbulb icon again before the 15 seconds it will shut off when you press it. There is no way to keep the backlight on or extend it beyond 15 seconds except to press the backlight icon after it shuts off, and cannot press it again to extend time before that or it will turn off.

How long do the batteries last under normal usage?

I purchased this on January 26th, 2019 so Ive had it a year and 2 months and the battery gauge reads on the lower end but it still works!

Will sitting this on a window ledge above the kitchen sink result in inaccurate readings?

Sitting on a window ledge above the kitchen sink will not give you accurate readings for the ROOM. The window will affect temperature readings and if you are running hot water in the sink, the humidity readings will probably go up.

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ThermoPro TP55 Digital Hygrometer Thermometer with Jumbo Touchscreen and Backlight, Indoor Temperature Humidity Monitor with Humidity Gauge Temperature Metre

ThermoPro TP55 Digital Hygrometer Thermometer with Jumbo Touchscreen and Backlight, Indoor Temperature Humidity Monitor with Humidity Gauge Temperature Metre

Product ID: 474741272

Details

Brand
TempPro
Display type
LCD
Global Trade Identification Number
Manufacturer
ThermoPro
Number of batteries
2 AA batteries
Power source
Battery

💡4'' jumbo backlit touchscreen

📊Max/Min trend tracking

📏±1°F/°C accuracy

Description

🌡️ Master your indoor climate with precision and style!

VERSATILE PLACEMENT - Wall mount, tabletop, or magnet mount options let you position it perfectly anywhere—from office to nursery.
READY OUT OF THE BOX - Includes batteries and intuitive touchscreen controls for instant setup and seamless daily use.
EFFORTLESS VISIBILITY - Large 4-inch backlit touchscreen display ensures easy reading even in low light or nighttime settings.
STAY AHEAD WITH TRENDS - Max & Min records update every 10 seconds, showing trends so you can proactively adjust your environment.
PRECISION YOU CAN TRUST - Highly accurate temperature and humidity readings within ±1°F/°C and ±2-3% RH for optimal indoor climate control.

The ThermoPro TP55 is a sleek, battery-powered digital hygrometer and thermometer featuring a jumbo 4-inch backlit touchscreen display. It delivers highly accurate temperature and humidity readings with ±1°F/°C and ±2-3% RH precision. Designed for versatile placement with wall, tabletop, and magnetic mounts, it tracks max/min values every 10 seconds and displays trends to help you maintain the perfect indoor environment. Ideal for health-conscious professionals managing home, office, or specialty rooms.

Specifications

ASIN	B06XTPTG1J
Brand	TempPro
Customer Reviews	4.6 4.6 out of 5 stars (23,862)
Display Type	LCD
Global Trade Identification Number	06927082802183, 08904296700557
Item Weight	2.7 Ounces
Manufacturer	ThermoPro
Manufacturer Part Number	TP-55
Model Number	TP-55
Number of Batteries	2 AA batteries required. (included)
Power Source	Battery Powered
Response Time	10 seconds
Special Features	Digital
Unit Count	1.0 count

Reviews

E**N

Great quality thanks

9.07.2025

C**A

Gives a lot of information for the price. Easy to read even without the light. I have a family room that has a wood stove for the heat. I want to know the temperature of the room so i don't get it too hot and waste wood which is expensive. So I put the thermometer in that room and determine the temperature of when I should start the stove and how much wood I need to add maintain the temperature I want. Works great for that.

22.02.2026

A**ー

見やすく数字も大きめで見やすく便利です。 1点ダンバンボールの中に商品が、いつものアマゾンのビニール固定でなく、馬鹿でかい段ボールに10分の1以下の箱入りの温度計がはっていました。明らかに箱の中で大暴れして精密機械なのでこれから故障が心配です。ブラッアマゾンはかんべん。

31.08.2018

R**B

Excellent Hygrometer and Thermometer. It seems to provide a very reliable reading. Batteries come included. The temperature readings can be changed between Deg F or Deg C. I like the magnet at the back that makes it installing easier on a mettalic surface e.g. a fridge door.

11.07.2020

J**F

Nice large screen with backlight for easy viewing at night. Also shows temp with an extra decimal point so you can tell the temps better.

28.10.2021

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