Digital Humidity Sensors - HYT 939 Hermetically Sealed Digital Humidity Sensor

HYT 939 Hermetically Sealed Digital Humidity Sensor

Description

HYT 939 has a welded, hermetically sealed TO 39 housing with glass grommet and sinter filter designed for compressed air systems up to 16 bar.

Due to the humidity calibration process and special polynomial correction method, a high accuracy of ±0.1% rH is achieved in the the low humidity region of 0-10% rH up to 50 ppm water content. The sensor is suitable for dew point measurements up to -40C dp, such as for the evaluation of medical compressed air quality.

Because of its robust construction, the sensor withstands peak loading at high temperatures. Therefore, this special model is also ideal for extremely sophisticated industrial applications in drying systems and suitable for medical systems.

I²C compatible interface is standard.

Features

Measurement range of 0 to 100% rH, -40°C to 125°C
Accuracy ±1.8% rH and ±0.2°C
Accuracy ±0.1% rH + 17% a_w from 0-10% rH
Resistant to pressure up to 16 bar
I²C interface
High chemical resistance
Dew formation resistant
Low operating voltage of 2.7 to 5.5V
TO39 housing
RoHS conformance

Technical Features

Parameter	Value
Measuring Principle:	Capacitive polymer humidity sensor
Humidity Range:	0-100% relative humidity
Humidity Accuracy:	±1.8% rH from 10-80% rH
Accuracy 0-10% rH from 0-50°C	±0.1%rH + 17 a_w
Humidity Resolution:	0.02% rH
Temperature Measurement Range:	-40 to +125°C
Temperature Accuracy:	±0.2°C
Temperature Resolution	0.015°C
Hysteresis:	less than ±1% rh
Response Time:	less than 10 sec with sinter filter
Digital Interface:	I2C, Address0x28 Alternative address
Meets RoHS conformity:	Yes