7Semi SHT45 Digital Humidity and Temperature Sensor Probe 0.1°C Accuracy 1% RH 16-bit I2C - 94cm Cable

Name: 7Semi SHT45 Digital Humidity and Temperature Sensor Probe 0.1°C Accuracy 1% RH 16-bit I2C - 94cm Cable
Brand: 7Semi
SKU: SENS-3784
Price: 1309.00 INR
Availability: OutOfStock

₹1,309.00 (Inclusive of all taxes)

Out of Stock

The 7Semi SHT45 is a high-precision digital humidity and temperature sensor probe with a 94cm cable, featuring a 16-bit I2C interface for seamless integration with microcontrollers like Arduino, Raspberry Pi, and ESP32. It delivers 0.1°C temperature and 1% RH humidity accuracy across a -40 to 125°C range, making it ideal for demanding environmental monitoring applications.

Features

High-precision sensing with 0.1°C temperature and 1% RH humidity accuracy.
Integrated power-trimmed heater with three selectable levels for stable operation in condensation-prone environments.
Robust metal probe with copper sintered filter and breathable protective membrane for dust and contaminant resistance.
Standard 4-wire I2C interface (VCC, GND, SDA, SCL) simplifies connection to 3.3V logic systems.
Includes a 94cm cable for flexible installation in industrial, HVAC, and research monitoring setups.

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Description

The 7Semi SHT45 sensor probe utilizes advanced capacitive sensing technology for humidity and a band-gap sensor for temperature, delivering calibrated digital outputs via a 16-bit I2C interface. Its integrated, power-trimmed heater actively prevents condensation on the sensing element, ensuring measurement integrity and long-term stability even in high-humidity or rapidly changing conditions.

Housed in a durable metal probe with a copper sintered filter and a breathable protective membrane, the SHT45 is shielded from dust, particulates, and chemical contaminants. This robust construction, combined with its wide operating temperature range (-40 to 125°C) and low power consumption, makes it suitable for integration into industrial process control, HVAC systems, meteorological stations, and precision agricultural monitoring networks.

Key Features

High-accuracy digital humidity and temperature sensor with 16-bit I2C output.
Integrated, configurable heater with three power levels for reliable operation in condensing environments.
Durable metal probe housing with a breathable membrane and sintered filter for environmental protection.
Ultra-low power consumption ideal for battery-powered or energy-efficient embedded systems.
Wide operating range from -40°C to 125°C and 0% to 100% relative humidity.
Pre-calibrated and tested for plug-and-play integration with 3.3V microcontrollers and SBCs.
Includes a 94cm 4-wire cable (Red: VCC, Black: GND, Yellow: SDA, Green: SCL) for flexible installation.

Applications

Precision climate monitoring and control in industrial HVAC and cleanroom environments.
Environmental data logging for meteorological stations and agricultural research networks.
Condensation prevention and humidity control in appliance manufacturing (e.g., dryers, dehumidifiers).
Process monitoring in pharmaceutical production, food storage, and laboratory incubators.
Integration into building automation systems (BAS) for energy management and indoor air quality (IAQ) monitoring.

Technical Specifications

Manufacturer Part Number	SHT45
Brand	7Semi
Interface	I2C (4-wire)
Operating Voltage	3.3 V
Temperature Range	-40 to 125 °C
Typ. Temperature Accuracy	±0.1 °C
Humidity Range	0 to 100 % RH
Typ. Humidity Accuracy	±1 % RH
Integrated Heater	Yes, 3 configurable levels
Cable Length	94 cm
Probe Material	Metal with copper sintered filter/PE membrane
Probe Length	72 mm
Probe Diameter	14 mm
Weight	53 g

Frequently Asked Questions

What is the operating voltage for the 7Semi SHT45 sensor?

The SHT45 sensor operates at 3.3V DC. It is designed for direct compatibility with 3.3V logic microcontrollers like many ESP32, STM32, and Raspberry Pi models. Ensure your power supply is regulated to 3.3V to prevent damage to the sensitive internal circuitry.

How do I connect the SHT45 probe to my microcontroller?

Connection is straightforward via the included 4-wire cable using the I2C protocol. Connect Red wire to 3.3V VCC, Black wire to GND, Yellow wire to the microcontroller's SDA pin, and Green wire to the SCL pin. No additional pull-up resistors are typically required as they are integrated on the sensor module.

What is the purpose of the integrated heater?

The power-trimmed internal heater serves two primary functions. First, it can be activated to drive off condensation, ensuring accurate readings in high-humidity environments. Second, it can be used for diagnostic purposes to verify sensor functionality. The heater has three configurable power levels for optimized performance and power management.

Is the SHT45 sensor pre-calibrated?

Yes, the 7Semi SHT45 is factory calibrated. Each unit is tested, and the calibration coefficients are stored in its integrated memory. This allows for plug-and-play operation without user calibration, providing the specified 0.1°C and 1% RH accuracy directly out of the package.

Can this sensor be used outdoors or in harsh industrial environments?

Yes, its robust metal probe housing, breathable protective membrane, and copper sintered filter provide excellent resistance to dust, contaminants, and splashes. With an operating temperature range of -40 to 125°C, it is well-suited for outdoor meteorological applications and many demanding industrial monitoring scenarios.