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    Parts    Sensirion SHT4x Family    SHT40    SHT40I-HD1F-R2
SHT40I-HD1F-R2

SENSHT40I-HD1F-R2

Sensirion AG
Humidity, Temperature 0 ~ 100% RH Analog Voltage ±2.5% RH 4 s Surface Mount
Active2,147 in stock
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Overview

The SHT40I-HD1F-R2 is an industrial-grade digital humidity and temperature sensor from Sensirion featuring an integrated PTFE membrane for protection against dust and liquids. It provides high-accuracy environmental sensing with an analog voltage output, making it compatible with legacy systems and PLC analog input cards. This sensor is designed for high-reliability applications with a wide operating temperature range of -40 to 125 degrees Celsius.

Why Choose This Part

The sensor features a rugged design with a 4-WDFN package and an integrated filter membrane that ensures long-term stability in harsh conditions. Its analog voltage output simplifies the interface for systems without I2C support, while maintaining low power consumption with a typical average current of 0.4 microamps.

Applications

Industrial Process Control
Monitoring humidity and temperature in factory environments where analog signal chains are standard.
HVAC System Integration
Providing environmental feedback for climate control units that utilize analog voltage inputs.
Cold Chain Monitoring
Tracking storage conditions for perishables in harsh industrial refrigeration environments.
Weather Stations
Outdoor environmental sensing where the PTFE membrane provides necessary protection against moisture ingress.

Key Specifications

Accuracy +/-2.5% RH
Output Type Analog Voltage
Sensor Type Humidity, Temperature
Mounting Type Surface Mount
Response Time 4 s
Humidity Range 0 ~ 100% RH
Package / Case 4-WDFN Exposed Pad
Voltage - Supply 4.5V ~ 5.5V
Operating Temperature -40degC ~ 125degC
Supplier Device Package 4-DFN (1.5x1.5)

Getting Started

To integrate this sensor, connect the 4.5V to 5.5V supply voltage and route the analog output to an ADC or PLC analog input. Ensure the DFN package is correctly soldered following the recommended reflow profile, and keep the PTFE membrane clear of obstructions to maintain the 4-second response time.

Part of Sensirion SHT4x family » SHT40

SHT40 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Accuracy Output Type Response Time Package Voltage Stock
SHT40I-HD1F-R2 (this part) +/-2.5% RH Analog Voltage 4 s WDFN-4 4.5V 2,147
SHT40-AD1F-R2 +/-1.8% RH I2C 4 s WDFN-4 1.08V 13,226
SHT40-BD1B-R3 +/-1.8% RH I2C 4 s UDFN-4 1.08V 13,490
SHT40-AD1B-R3 +/-1.8% RH I2C 4 s WDFN-4 1.08V 16,564
SHT40-BD1B-R2 +/-1.8% RH I2C 4 s UDFN-4 1.08V 11,341
SHT40-CD1B-R3 +/-1.8% RH I2C 4 s UDFN-4 1.08V 13,798
SHT40-AD1B-R2 +/-1.8% RH I2C — WDFN-4 1.08V 9,656
SHT40I-BD1B-R3 +/-2% RH I2C 4 s UDFN-4 2.3V 12,446
SHT40I-HD1B-R2 +/-2.5% RH I2C 4 s WDFN-4 4.5V 868
SHT40-AD1P-R2 +/-1.8% RH I2C 6 s UDFN-4 1.08V 6,395
SHT40-BD1F-R2 +/-1.8% RH I2C 4 s WDFN-4 1.08V —

Also Consider

SHT40-AD1F-R2 SENSensirion AG - Standard I2C version for digital-first architectures needing the same PTFE membrane protection.
SHT31-ARP-B SENSensirion AG - Previous generation analog output humidity sensor with a different voltage range and footprint.