Testo 605i Thermohygrometer - Hygrometer & Indoor Thermometer for Humidity Measurement and Indoor Temperature - 90° Bendable In-Duct Temperature and Humidity Monitor with Bluetooth - iOS & Android
Condition: New
$139.19
Holiday Deal
· 5% off
was $146.19
Buy Now, Pay Later
As low as
$23.20
/ mo
Learn more
- – 6-month term
- – No impact on credit to apply
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Free shipping on this product
Extended holiday returns
FREE refund/replacement until Jan 31, 2027 Learn more
FREE refund/replacement until Jan 31, 2027 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2027
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
In Stock.
Arrives
Sunday, Nov 15
Recently Viewed
At a glance
- Condition
- New
- Dimensions
- 1"W x 10"H
- Weight
- 95 g
- Color
- black/orange
- Battery Description
- Alkaline
- Mounting Type
- Tabletop
- Voltage
- 3 volts
- In the box
- industrial-and-scientific-temperature-indicators
Features 5
- 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
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
Specs 20
| Color | black/orange |
|---|---|
| Brand | Testo |
| Product Dimensions | 1"W x 10"H |
| Item Weight | 95 g |
| Battery Description | Alkaline |
| Mounting Type | Tabletop |
| Operating Humidity | 10-35%, 35-65%, 65-90%, <10% RH or >90% RH (at 77°F) |
| Upper Temperature Range | 140 °F |
| Voltage | 3 volts |
| Temperature Accuracy | 0.5 °C |
| Temperature Reading Accuracy | plus_minus_0_point_5_degrees_celsius |
| Item Dimensions W x H | 1"W x 10"H |
| Brand Name | Testo |
| Number of Items | 1 |
| Manufacturer | Testo |
| Unit Count | 1 Count |
| Number of Packs | 1 |
| Global Trade Identification Number | 31 |
| Model | 0560 2605 03 |
| Part Number | 0560 2605 03 |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Nov 15
Yes, absolutely! This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2027.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- Zip Pay in 4
- Financing through Apple Pay
- Financing through Google Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Wow thermostats are inaccurate!!!
Style: Thermohygrometer
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.
...
show more
Reviewed in the United States on May 31, 2026 by AW2222
Excellent quality and integration with the testo app
Style: Thermohygrometer
Excellent for differential temperature testing on testo app. Well made and blue tooth goes really far distance.
Reviewed in the United States on September 30, 2026 by Paul W.
Very useful
Style: Thermohygrometer
Bought (3) nice for checking return, supply and ambient temps, works great with MeasureQuick app.
Reviewed in the United States on April 22, 2025 by Michael Cofske
Very good instrument
Style: Thermohygrometer
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.
Reviewed in the United States on February 15, 2026 by L.Lopez
Best bluetooth thermometer
Style: Thermohygrometer
Awesome to have something to check temps in a RIC
Reviewed in the United States on December 29, 2025 by Adam P.
Work well
Style: Thermohygrometer
Work fineExcept the power on switch which gets pushed accidentally a lot if you place them in anything but the OEM case, they are great I prefer fieldpiece now though
Reviewed in the United States on August 16, 2025 by BO
Testo 605i
Style: Thermohygrometer
Excelente Producto!.
Reviewed in the United States on December 13, 2025 by martin gabriel
Works great and connectivity it’s seamless
Style: Thermohygrometer
Turn on and throw it inside of a refrigerator you’re temping down and checking cut in cut out temps on and don’t have to worry about opening the door to check on it just download the app and see everything on your phone. Bluetooth distance is further then I thought it’d go. Also batteries last pretty long as well
...
show more
Reviewed in the United States on September 4, 2023 by Randall Adams