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Company Info
Shenzhen Isweek Ltd Shenzhen Isweek Ltd

Street Address: 16 Floor, Building #3, Zhongke Mansion, Gaoxin South 1st Rd, Hi-Tech Park, Nanshan

City: Shenzhen

Province: Guangdong

Country/Region: China

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Thin-Film Humidity Sensing Element

Thin-Film Humidity Sensing Element

Application:  -

Market Type:  After Market

Product Attribute:

Applicationt: 

-

Production Description:

Thin-film Humidity Sensing Element SH

Low cost
Wide T/RH operating zone
Operating temperature up to 200°C
Excellent sensibility
Very good dynamic properties
Short response time
Long-term stability

The SH relative humidity sensing element consists of a system of electrodes on a glass-ceramic substrate, covered by a humidity-sensitive polymer coating and a water-vapor permeable metallic membrane. This coating system represents a humidity-dependent capacitor. Utilizing the principal of capacitive measurement, SH measures relative humidity in air or other non-aggressive gases and gas mixtures with good long-term stability and linearity, small hysteresis, and excellent dynamic response.

SH Thin-film Humidity Sensing Element Technical specifications


Variant		 1 2 3
Measurement range 0 - 100 %RH
Operating temperature -60~200°C; with protective cap (option): -40~120 °C
Temperature dependence RH' = [RH + a*(T-25)]*(b0 +b1 *T+b2 *T2),  where: a = 0.04 for T 25°C, 0 for T < 25°C; b0 = 0.98; b1 = 6x10-4; b2 = 6x10-6
Permissible voltage max. 3 VAC (no DC voltage allowed!)
Nominal capacitance 115 ± 15 pF at 20°C 135 ± 10 pF at 20°C 1050 ± 50 pF at 20°C
Sensitivity 0.25 pF / %RH 0.35 pF / %RH 2.5 pF / %RH
Non-linearity < 1.5% at 5 - 95 %RH < 1.5% at 5 - 95 %RH < 1.5% at 5 - 95 %RH
Hysteresis < 1.5 %RH at 5 - 95 %RH < 1.5 %RH at 5 - 95 %RH < 1.5 %RH at 5 - 95 %RH
Long-term stability < 1 %RH per year < 1 %RH per year < 1.5 %RH per year
Response time < 10 s < 10 s < 10 s
Loss factor < 0.03 at 10 kHz < 0.03 at 10 kHz < 0.03 at 10 kHz
Operating frequency 30 - 300 kHz 30 - 300 kHz 30 - 300 kHz
Application climate control, handheld meters, humidifiers, dehumidifiers, 
HVAC and industrial applications, high-temperature applications

SH Thin-film Humidity Sensing Element Ordering code  SH* - #1

Code		 Feature or option Code values
* Variant 1, 2, 3
#1 Protective cap X - none, P - plastic protective cap

Thin-Film Humidity Sensing Element
 

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