---
title: UNI-T Mini Temperature Humidity Meter (UT333BT)
date: 2024-01-18 09:00:07
permalink: https://lesterchan.net/blog/2024/01/18/uni-t-mini-temperature-humidity-meter-ut333bt/
author: Lester Chan
categories:
  - Tool
tags:
  - humidity sensor
  - Lazada
  - temperature sensor
  - UNI-T
---

I have multiple gadgets for reading and displaying temperatures and humidity like the [Aqara Temperature and Humidity Sensor](https://lesterchan.net/blog/2023/09/18/aqara-temperature-and-humidity-sensor/), [Aqara TVOC Air Quality Monitor](https://lesterchan.net/blog/2023/09/25/aqara-tvoc-air-quality-monitor/), or the [Xiaomi Mi Multifunctional Digital Clock](https://lesterchan.net/blog/2021/07/21/xiaomi-mi-multifunctional-digital-clock/). But none of them give you real-time readings, and you are unsure when the reading displayed is taken.

So I decided to get the [UNI-T Mini Temperature Humidity Meter (UT333BT)](https://meters.uni-trend.com/product/ut333-ut333bt/), which gives me the real-time reading of the temperature and humidity in the room. UT333BT is the Bluetooth version; hence, the letters BT are at the back of the product name.

Judging from the packaging, three AAA batteries were supposed to be included with the UT333BT, but when I received it, it was empty.

[![UNI-T Mini Temperature Humidity Meter (UT333BT) - Packaging Front](https://live.staticflickr.com/65535/53469398210_d6a8466ce2_c.jpg)](https://live.staticflickr.com/65535/53469398210_0915387863_o.jpg "UNI-T Mini Temperature Humidity Meter (UT333BT) - Packaging Front")

[![UNI-T Mini Temperature Humidity Meter (UT333BT) - Packaging Back](https://live.staticflickr.com/65535/53469397920_087075a62f_c.jpg)](https://live.staticflickr.com/65535/53469397920_1351fbfaf1_o.jpg "UNI-T Mini Temperature Humidity Meter (UT333BT) - Packaging Back")

[![UNI-T Mini Temperature Humidity Meter (UT333BT) - Packaging Contents](https://live.staticflickr.com/65535/53469116578_81d380eca8_c.jpg)](https://live.staticflickr.com/65535/53469116578_d9cd4ec3a9_o.jpg "UNI-T Mini Temperature Humidity Meter (UT333BT) - Packaging Contents")

UNI-T Mini Temperature Humidity Meter (UT333BT) is a no-frills tool and does exactly what the name describes. I bought it for **S$27.49** on [Lazada](https://s.lazada.sg/s.Y67Ck).

[![UNI-T Mini Temperature Humidity Meter (UT333BT) - Front](https://live.staticflickr.com/65535/53469397925_2e4c494a3c_c.jpg)](https://live.staticflickr.com/65535/53469397925_7d26d670a9_o.jpg "UNI-T Mini Temperature Humidity Meter (UT333BT) - Front")

[![UNI-T Mini Temperature Humidity Meter (UT333BT) - Back](https://live.staticflickr.com/65535/53469116573_21b9f5b930_c.jpg)](https://live.staticflickr.com/65535/53469116573_c52992b796_o.jpg "UNI-T Mini Temperature Humidity Meter (UT333BT) - Back")

Three AAA batteries power it, and it will auto-switch off after five minutes of inactivity.

[![UNI-T Mini Temperature Humidity Meter (UT333BT) - 3x AAA Batteries](https://live.staticflickr.com/65535/53469297034_856f55f7f1_c.jpg)](https://live.staticflickr.com/65535/53469297034_75345e52f8_o.jpg "UNI-T Mini Temperature Humidity Meter (UT333BT) - 3x AAA Batteries")

[![UNI-T Mini Temperature Humidity Meter (UT333BT) - Sensor Tip](https://live.staticflickr.com/65535/53468980011_c71938e65b_c.jpg)](https://live.staticflickr.com/65535/53468980011_8b4cd2e56d_o.jpg "UNI-T Mini Temperature Humidity Meter (UT333BT) - Sensor Tip")

You can connect the UT333BT to your phone via Bluetooth using the iENV app, which is available on iOS and Android.

[![iENV iOS App - Readings](https://live.staticflickr.com/65535/53468092467_d7d97c9375_c.jpg)](https://live.staticflickr.com/65535/53468092467_9738e78020_o.png "iENV iOS App - Readings")

[![iENV iOS App - Settings](https://live.staticflickr.com/65535/53469316554_acdf178f78_c.jpg)](https://live.staticflickr.com/65535/53469316554_cab0223975_o.png "iENV iOS App - Settings")

Interestingly, the RH of my house is around 68%, and after I shower, the RH of the toilet is about 78%.

[![UNI-T Mini Temperature Humidity Meter (UT333BT) - Powered On](https://live.staticflickr.com/65535/53469116433_10fdef602b_c.jpg)](https://live.staticflickr.com/65535/53469116433_94d1c54509_o.jpg "UNI-T Mini Temperature Humidity Meter (UT333BT) - Powered On")

I am using the [Philips Series 5000 2-in-1 Air Purifier and Dehumidifier](https://www.philips.com.sg/c-p/DE5205_30/series-5000-2-in-1-air-dehumidifier) and often set it to 40% RH. Using my UT333BT, the difference in the reading is about 5%. The dehumidifier will detect 40%, while the UT333BT will see about 45%.

[![UNI-T Mini Temperature Humidity Meter (UT333BT)](https://live.staticflickr.com/65535/53469116558_2628b5f57f_c.jpg)](https://live.staticflickr.com/65535/53469116558_6d2f555ea4_o.jpg "UNI-T Mini Temperature Humidity Meter (UT333BT)")