Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	SHT40
Interface Type	I2C (IIC)
Supply Voltage	1.7V to 3.6V
Temperature Range	-40°C to +125°C
Humidity Range	0% to 100% RH
Temperature Accuracy	±0.2°C
Humidity Accuracy	±1.8% RH
Package Type	DFN8 Module with Probe
Compatibility	Replace SHT20, SHT30
Application	HVAC, IoT, Weather Stations

6 reviews

Anonymous

Mar 31, 2026

Rating: 5/5

Reliable for plant monitoring

I replaced several sensors in my automated greenhouse with these. They handle the high humidity environment perfectly without drifting.

Anonymous

Mar 17, 2026

Rating: 5/5

Perfect upgrade from SHT30

The accuracy on this SHT40 module is noticeably better than my old SHT30 setup. The I2C communication was stable right out of the box with my ESP32 project.

Anonymous

Mar 12, 2026

Rating: 5/5

Fast response time

Impressed by how quickly this reacts to changes in temperature compared to older models. Ideal for logging rapid environmental shifts.

Anonymous

Mar 06, 2026

Rating: 4/5

Great sensor, needs pull-up resistors

The sensor works great, but remember you need external pull-up resistors on the SDA and SCL lines if your board doesn't have them built-in. Once sorted, data is crisp.

Anonymous

Mar 05, 2026

Rating: 5/5

Compact and easy to wire

The probe form factor makes it easy to place inside enclosures where space is tight. Wiring is straightforward for anyone familiar with I2C.

Anonymous

Mar 02, 2026

Rating: 4/5

Solid performance

Very consistent readings over a week of testing. Deducting one star only because the documentation link on the package was broken, but datasheets are easy to find online.

5 FAQ

Q: Does this come with a library for Raspberry Pi?

A: We do not bundle physical media, but the SHT40 is widely supported. You can easily use existing Python libraries like 'sht4x' available via pip for Raspberry Pi projects.

Q: Is this module compatible with 5V Arduino boards?

A: Yes, but since the SHT40 operates between 1.7V and 3.6V, you must use a logic level converter or an I2C breakout board with voltage regulation when connecting to 5V systems.

Q: How long is the probe cable?

A: This specific listing is for the compact DFN8 module with short leads suitable for direct PCB mounting or very short connections. It does not include a long extension cable.

Q: What is the default I2C address for this sensor?

A: The default I2C address for the SHT40 is typically 0x44. Some variants may allow address selection via hardware pins, so please check the specific schematic included.

Q: Can I use this outdoors in direct rain?

A: The sensor chip itself is robust, but the module PCB is not waterproof. You should house it in a breathable weatherproof enclosure to protect the electronics while allowing air flow for accurate readings.

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