Adafruit SHT45 Trinkey - USB Temp and Humidity Sensor with PTFE

SKU: ADA6260 Brand: Adafruit

It's half USB Key, half temperature-humidity sensor... it's the Adafruit SHT45 Trinkey with a PTFE filter. We wanted to make it super-easy to add...

$41.10 AUD, inc GST

$37.36 AUD, exc GST

Available with a lead time
Expect dispatch between Jun 30 and Jul 02

Quantity Discounts:

10+ $35.87 (exc GST)
25+ $34.75 (exc GST)

It's half USB Key, half temperature-humidity sensor... it's the Adafruit SHT45 Trinkey with a PTFE filter. Adafruit wanted to make it super-easy to add one of Adafruit's most popular combination environmental sensors to any computer with a USB A port.

The PCB is designed to slip into any USB A port on a computer or laptop. There's an ATSAMD21 microcontroller on board with just enough circuitry to keep it happy. One pin of the microcontroller connects to a NeoPixel LED. Another pin is used as a capacitive touch input on the end. A reset button lets you enter bootloader mode if necessary. That's it!

The SAMD21 can run CircuitPython or Arduino nicely - both have existing SHT4x, NeoPixel, and Adafruit's FreeTouch (capacitive touch) libraries. Over the USB connection, you can have serial, MIDI, or HID connectivity.

The star of this Trinkey is the SHT45 from Sensirion. Sensirion Temperature/Humidity sensors are some of the finest and highest-accuracy devices you can get. The SHT45 sensor is the fourth generation (started at the SHT10 and worked its way up to the top!). The SHT45 has an excellent ±1.0% typical relative humidity accuracy from 25 to 75% and ±0.1°C typical accuracy from 0 to 75 °C.The reported temperature may be a few degrees higher than ambient due to self-heating.

The SHT45 Trinkey is perfect for simple projects that want to read the ambient temperature and humidity without extra wiring, soldering, drivers, or complex software. Adafruit even ship the board pre-programmed with code that will print a unique serial number, the temperature, humidity, and touch sensor over a serial/COM port in CSV (comma-separated value) format so you can use it immediately. If you need to measure farther than the computer port, simply use any USB A extension cable.

If you don't need high precision, save a few $ with the SHT41 Trinkey, which has ±1.8% typical relative humidity accuracy from 25 to 75% and ±0.2°C typical accuracy from 0 to 75 °C.

We think it's just an adorable little board. It's small, durable, and inexpensive enough to be a first microcontroller board or an inspiration for advanced developers to make something simple and fun.

ATSAMD21E18 32-bit Cortex M0+ - 48 MHz 32-bit processor with 256KB Flash and 32 KB RAM
Native USB CDC ACM supported by every OS (Mac OS X, Windows 7~11, Linux) - can be used in Arduino or CircuitPython as a USB serial console, MIDI, Keyboard/Mouse HID, and even a little disk drive for storing Python scripts.
Can be used with Arduino IDE or CircuitPython
One RGB NeoPixel LED
One Capacitive Touchpad
SHT45 Temperature + Humidity sensor with thermal-isolation cutout and a PTFE filter
Reset switch to start your project code over or enter bootloader mode
Slim and cute, keychain-friendly!

Technical Details

SHT45-AD1F-R2 specifications:

PTFE Filter cover for protection:
The filter membrane option for SHT4x family members inherently provides an additional barrier for all pollutants to enter the sensor opening, thus lowering negative influences on the sensing element. Mostly designed to keep particles and dust from accumulating and reducing the response time, the membrane also enables more efficient and easy cleaning, as it helps to reduce liquid intrusion into the sensor opening. Even though not selectively filtering, in general, physical barriers allow to reduce the amount of unwanted chemical contamination and help to remove potentially harmful components by facilitating wiping (flat sensor surface).
The integrated SHT4x PTFE membrane provides additional protection from particles and enables sensor operation in harsh conditions (according to IP67). The membrane has a thickness of 100 µm offering a filtration efficiency of >99.99% for particles of 200 nm size and larger. Owing to the high permeability and the small volume between sensing element and membrane, the specified response time of the RH sensor is unaltered.
Accuracy Specification: ?RH = ±1.0 %RH, ?T = ±0.1 °C
Breakout board Vdd/logic: 3.3V to 5V
Avg. current: 0.4 µA, Idle current: 80 nA (not including on-board regulator quiescent)
I2C FM+, CRC checksum, default I2C addr 0x44
Operating range: 0 … 100 %RH, -40…125 °C
Fully functional in condensing environment
Power heater, true NIST-traceability
JEDEC JESD47 qualification
Sensor-specific calibration certificate acc. to ISO 17025 : 2017, 3-point temp. calibration
More information at Sensirion!

Learn

Primary Guide: Adafruit SHT4x Trinkey Half USB key, half temperature-humidity sensor

Product Comments

Start the conversation

Exact shipping can be calculated on the view cart page (no login required).

Products that weigh more than 0.5 KG may cost more than what's shown (for example, test equipment, machines, >500mL liquids, etc).

We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):

$3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
$7+ for Standard Post (typically 6+ business days, tracked)
$11+ for Express Post (typically 2+ business days, tracked)
Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.

Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.

Some batteries (such as LiPo) can't be shipped by Air. During checkout, Express Post and International Methods will not be an option if you have that type of battery in your shopping cart.

International Orders - the following rates are for New Zealand and will vary for other countries:

$12+ for Pack and Track (3+ days, tracked)
$16+ for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount will increase based on the weight of your order.

Our physical address (here's a PDF which includes other key business details):

40 Aruma Place
Cardiff
NSW, 2285
Australia

Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.

Have a product question? We're here to help!