--- product_id: 154778250 title: "Testo 605i Thermohygrometer - Hygrometer & Indoor Thermometer for Humidity Measurement and Indoor Temperature - 90° Bendable In-Duct Temperature and Humidity Monitor with Bluetooth - iOS & Android" brand: "testo" price: "€ 321.74" currency: EUR in_stock: true reviews_count: 12 category: "Testo" url: https://www.desertcart.hr/products/154778250-testo-605i-thermohygrometer-hygrometer-and-indoor-thermometer-for-humidity-measurement store_origin: HR region: Croatia --- # 150h battery life with instant use Bluetooth-enabled smart monitoring 90° bendable probe for versatile access Testo 605i Thermohygrometer - Hygrometer & Indoor Thermometer for Humidity Measurement and Indoor Temperature - 90° Bendable In-Duct Temperature and Humidity Monitor with Bluetooth - iOS & Android **Brand:** testo **Price:** € 321.74 **Availability:** ✅ In Stock ## Summary > 📊 Elevate your HVAC game with smart precision and flexible reach! ## Quick Answers - **What is this?** Testo 605i Thermohygrometer - Hygrometer & Indoor Thermometer for Humidity Measurement and Indoor Temperature - 90° Bendable In-Duct Temperature and Humidity Monitor with Bluetooth - iOS & Android by testo - **How much does it cost?** € 321.74 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/154778250-testo-605i-thermohygrometer-hygrometer-and-indoor-thermometer-for-humidity-measurement) ## Best For - testo enthusiasts ## Why This Product - Trusted testo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Bluetooth Integration:** Seamlessly stream live temperature & humidity data to your iOS or Android device for real-time insights and effortless reporting. - • **Flexible 90° Bendable Probe:** Access hard-to-reach ducts, crawl spaces, and registers with a compact, bendable sensor head designed for precision in tight spots. - • **Accurate Environmental Metrics:** Measure temperature (-20 to 60°C) and relative humidity with ±0.5°C accuracy, plus automatic dew point and wet bulb calculations. - • **Pro-Grade App for Data Logging:** Leverage the free Testo Smart Probes app to log, analyze, and share custom reports—perfect for HVAC pros who demand precision and efficiency. - • **Instant Setup & Long Battery Life:** Comes calibrated and ready with 3 AAA batteries, delivering up to 150 hours of continuous use—no downtime, no hassle. ## Overview The Testo 605i Thermohygrometer is a professional-grade Bluetooth-enabled device designed for precise indoor temperature and humidity measurement. Featuring a 90° bendable probe for versatile access, ±0.5°C accuracy, and a powerful mobile app for live data streaming and reporting, it’s the ultimate tool for HVAC technicians and environmental monitoring. Ready to use out of the box with long battery life, it ensures you never miss a critical reading in rooms, ducts, or crawl spaces. ## Description Testo 605i smart thermohygrometer - 90° bendable temperature and humidity monitor for in-duct measurementsThe testo 605i humidity gauge and indoor thermometer for home is an efficient, easy-to-use tool for temperature and humidity measurement in rooms, ducts, crawl spaces, registers and environmental boxes/chambers. The hygrometer and indoor thermometer supports Bluetooth, making it easier than ever to create reports and generate automatic calculations such as calculations of dew point and wet bulb temperature.Technical data 605i:Measuring range: -4° to 140 °F / -20 to +60°CAccuracy: ±1.4 °F (-4° to 32 °F) / ±0.8 °C (-20 to 0 °C); ±0.9 °F (32° to 140 °F) / ±0.5 °C (0 to +60 °C)Storage temperature: -4° to 140 °F / -20 to +60 °CResolution: 0.1 %rHBattery life: 150hBattery type: 3 x AAAWeight: 3.05 oz. / 86.4 gDimensions: 10 x 1 x 1 in. / 243 x 30 x 24 mmSystem requirements: requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0Scope of Delivery:1 x testo 605i Bluetooth thermo-hygrometer with app, 3 x AAA batteries, certificate of calibration Review: Very good instrument - Best in class Use this thermohygrometer in many commissioning tests. Aside of a high accuracy, the online data capture and basic reports that can be exported in ccv format, makes this instrument a good option for field testing. Review: Wow thermostats are inaccurate!!! - I purchased this highly rated Testo 605i thermohygrometer to add to my arsenal of HVAC tools. This device measures both temperature and humidity very accurately. Even better it allows for a bluetooth connection to your phone and the Testo Smart app to trend both of these measurements. I just go to the Climate/Air Velocity section and select the Basic View at the top of the screen to see these. One of the issues I was having was what appeared to be poor dehumidification with our AC system. This turned out to be inaccurate because our Ecobee thermostats are incredibly inaccurate. In fact, one of them was off by 10% humidity and we thought we were going to have a mold problem because we could not get below 60%. This is outragous as we have struggled with this issue for a long time. In any case, I did several tests of this probe including with humidity packets in a ziplock bag and this thing was absolutely faithful in measuring humidity accurately. I was able to use the temperature and humidity correction (under settings, advanced options, thresholds and scroll to the bottom) within the Ecobee to get it dialed in correctly. I had to do this on 4 other Ecobee thermostats and based upon reading other comments/reviews on the Internet this is a known problem with these thermostats even when sealing the thermostat wiring hole. Sadly, our Airthings Plus is also reading too high humidity by about 8% but it does not provide any way to correct the reading. I'll have to use the Ecobees as our Hubitat home automation reference going forward as we have been using it to control a whole-house dehumidifier. Although this was a bit pricey and I didn't have time to shop around for a deal this was a fantastic tool to have in the tool box and can highly recommend it. It may end up saving you $$$ in the long run before having to invest in equipment to solve a problem that isn't necessary for dehumidification. 5/5 stars. ## Features - Efficient; The testo 605i thermohygrometer is ideal for measurements in rooms, ducts, crawl spaces, registers and environmental boxes and chambers due to the compact probe head bendable to 90° - Smart; Enabling live data feed integration and automatic calculations which are conveniently displayed on your terminal device, the 605i temperature and humidity monitor is ideal for all HVAC/R technicians - Versatile; The testo 605i hygrometer and indoor thermometer measures relative air humidity and temperature in rooms and ducts and calculates dew point and wet bulb temperature automatically - Easy to use; The 605i digital humidity meter and indoor thermometer for home allows accurate remote monitoring and is operated via mobile device. Supplied calibrated and with 3 AAA batteries for instant use - App for Android and iOS; The free testo Smart Probes App is a powerful tool that allows you to read and log measurements of the thermometer and humidity gauge and create custom reports which can be saved and shared ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07V717PFD | | Battery Description | Alkaline | | Best Sellers Rank | #42,570 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #112 in Indoor Thermometers | | Brand | Testo | | Brand Name | Testo | | Color | black/orange | | Customer Reviews | 4.7 out of 5 stars 377 Reviews | | Global Trade Identification Number | 04029547022531 | | Included Components | industrial-and-scientific-temperature-indicators | | Item Dimensions W x H | 1"W x 10"H | | Item Weight | 95 Grams | | Manufacturer | Testo | | Model | 0560 2605 03 | | Mounting Type | Tabletop | | Operating Humidity | 10-35%, 35-65%, 65-90%, <10% RH or >90% RH (at 77°F) | | Part Number | 0560 2605 03 | | Product Dimensions | 1"W x 10"H | | Temperature Accuracy | 0.5 Degrees Celsius | | Temperature Reading Accuracy | plus_minus_0_point_5_degrees_celsius | | Unit Count | 1.0 Count | | Upper Temperature Range | 140 Degrees Fahrenheit | | Voltage | 3 Volts | ## Product Details - **Battery Description:** Alkaline - **Brand:** Testo - **Color:** black/orange - **Item Weight:** 95 Grams - **Product Dimensions:** 1"W x 10"H ## Images ![Testo 605i Thermohygrometer - Hygrometer & Indoor Thermometer for Humidity Measurement and Indoor Temperature - 90° Bendable In-Duct Temperature and Humidity Monitor with Bluetooth - iOS & Android - Image 1](https://m.media-amazon.com/images/I/516IbfqIX0L.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Is there a sdk/api - can one programmatically read the output (write my own app)?** A: I don't know, But I use the Measure Quick app. **Q: Hi there. Is this a second gen?** A: Mine has the magnet and stick bend also. My Bluetooth range is somewhere around 50 ft or so through normal wood walls. Works great. **Q: will it stay easily in side an air vent?** A: It comes with a magnetic collar. I find it stays nicely on all types of tin just put the tip through a 1/4" hole in the duct (easily plugged or covered when your done) and let the collar do it's job. I got two so I can do real time we and dry bulb delta T. It also has a magnet in the Handel. However, if you want to place the whole unit in the vent it will not read as well as the probe is ment to be perpendicular to the airflow. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Very good instrument *by L***Z on February 15, 2026* Best in class Use this thermohygrometer in many commissioning tests. Aside of a high accuracy, the online data capture and basic reports that can be exported in ccv format, makes this instrument a good option for field testing. ### ⭐⭐⭐⭐⭐ Wow thermostats are inaccurate!!! *by A***2 on May 31, 2026* I purchased this highly rated Testo 605i thermohygrometer to add to my arsenal of HVAC tools. This device measures both temperature and humidity very accurately. Even better it allows for a bluetooth connection to your phone and the Testo Smart app to trend both of these measurements. I just go to the Climate/Air Velocity section and select the Basic View at the top of the screen to see these. One of the issues I was having was what appeared to be poor dehumidification with our AC system. This turned out to be inaccurate because our Ecobee thermostats are incredibly inaccurate. In fact, one of them was off by 10% humidity and we thought we were going to have a mold problem because we could not get below 60%. This is outragous as we have struggled with this issue for a long time. In any case, I did several tests of this probe including with humidity packets in a ziplock bag and this thing was absolutely faithful in measuring humidity accurately. I was able to use the temperature and humidity correction (under settings, advanced options, thresholds and scroll to the bottom) within the Ecobee to get it dialed in correctly. I had to do this on 4 other Ecobee thermostats and based upon reading other comments/reviews on the Internet this is a known problem with these thermostats even when sealing the thermostat wiring hole. Sadly, our Airthings Plus is also reading too high humidity by about 8% but it does not provide any way to correct the reading. I'll have to use the Ecobees as our Hubitat home automation reference going forward as we have been using it to control a whole-house dehumidifier. Although this was a bit pricey and I didn't have time to shop around for a deal this was a fantastic tool to have in the tool box and can highly recommend it. It may end up saving you $$$ in the long run before having to invest in equipment to solve a problem that isn't necessary for dehumidification. 5/5 stars. ### ⭐⭐⭐⭐⭐ Very useful *by M***E on April 22, 2025* Bought (3) nice for checking return, supply and ambient temps, works great with MeasureQuick app. ## Frequently Bought Together - Testo 605i | Thermohygrometer for Indoor Temperature and Humidity Measurement | with Bluetooth Support - testo 405i – Anemometer handheld for air velocity, in-duct airflow, and temperature – CFM meter with Bluetooth and App operation - Testo 0560 1510 510I Differential Pressure Manometer Smart and Wireless Probe, 1" Height, 1" Width, 6" Length --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/154778250-testo-605i-thermohygrometer-hygrometer-and-indoor-thermometer-for-humidity-measurement](https://www.desertcart.hr/products/154778250-testo-605i-thermohygrometer-hygrometer-and-indoor-thermometer-for-humidity-measurement) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-28*