HUMIREL HS 1100, HS 1101 User Manual

TECHNICAL DATA

1

RELATIVE HUMIDITY SENSOR

HS 1100 / HS 1101

Based on a unique capacitive cell, these relative humidity sensors are designed for high
volume, cost sensitive applications such as office automation, automotive cabin
air control, home appliances, and industrial process control systems. They are
also useful in all applications where humidity compensation is needed.

FEATURES

● Full interchangeability with no calibration required in standard conditions

● Instantaneous desaturation after long periods in saturation phase

● Compatible with automatized assembly processes, including wave soldering,

reflow and water immersion

(1)

● High reliability and long term stability

● Patented solid polymer structure

● Suitable for linear voltage or frequency output circuitry

● Fast response time

● Individual marking for compliance to stringent traceability requirements

(1) soldering temperature profiles available on request

MAXIMUM RATINGS (Ta= 25°C unless otherwise noted)

CHARACTERISTICS

Ratings Symbol Value Unit

Operating Temperature T

a -40 to 100 °C

Storage Temperature Tstg -40 to 125 °C
Supply Voltage Vs 10 Vac
Humidity Operating Range RH 0 to 100 % RH
Soldering @ T = 260°C t10s

Characteristics Symbol Min. Typ. Max. Unit.

Humidity measuring range RH 1 99 %
Supply voltage Vs 5 10 V
Nominal capacitance @ 55% RH* C 177 180 183 pF
Temperature coefficient T

cc 0.04 pF/°C

Averaged Sensitivity from 33% to 75% RH

∆C/%RH 0.34 pF/%RH

Leakage current (Vcc = 5 Volts) I

x 1nA

Recovery time after 150 hours of condensation tr 10 s
Humidity Hysteresis +/-1.5 %
Long term stability 0.5 %RH/yr
Response time (33 to 76 % RH, still air @ 63%) ta 5 s
Deviation to typical response curve (10% to 90% RH) +/-2 % RH

(Ta = 25°C, measurement frequency @ 10kHz unless otherwise noted)

* Tighter specification available on request

HPC001 Rev. 7 June 2002

1

2

HS 1100

Top opening

HS 1101

Side opening

OPERATING RANGE

100

STEADY STATE

75

PEAK CONDITIONS

50

25

RELATIVE HUMIDITY IN %

0

-40 -20 0 20 40 60 80

TEMPERATURE IN °C

100

TECHNICAL DATA

2

CHARACTERISTICS (CONT’D)

PROPORTIONAL VOLTAGE OUTPUT CIRCUIT

Typical response curve

of HS 1100/HS 1101 in humidity

Calibration data are traceable to NIST
standards through CETIAT laboratory.

Measurement frequency : 10kHz

Ta = 25°C

Polynomial response : C(pf)=C@55%*(1.2510-7RH3-1.3610-5RH2+2.1910-3RH+9.010-1)

Measurement frequency influence

In this data sheet, all capacitance measurements are @ 10kHz. However, the sensor can operate without restriction from
5kHz to 100kHz. To calculate the influence of frequency on capacitance measurements :

C@fkHz=C@10kHz(1.027-0.01185Ln(fkHz))

Polarization

In order to get a better reproducibility during measurements, always connect the case of the header (pin 2) to the ground
of the circuit.
The case of the header is located on the opposite side of the tab.

Soldering instructions : see the Application Note HPC007

Internal Block Diagram

Typical Characteristics for Voltage Output Circuit

At Vcc5V - 25°C

Reference Oscillator

Sensor Oscillator

L.P. Filter

Gain

V

out

V

out=Vcc

*

(0.00474*%RH+0.2354)

for 5 - 99% RH

Typical temperature coefficient :

+0.1% RH/°C - From 10 to 60°C

DEMO BOARD AVAILABLE ON REQUEST (REF HM1510)

RH

Vo lt a ge (V)

0

-

1.41 1.65 1.89 2.12 2.36 2.60 2.83 3.07 3.31 3.55

10 20 30 40 50 60 70 80 90 100

HPC001 Rev. 7 June 2002

RH in % RH

205

200

195

190

185

180

capacitance (in pF)

175

170

165

160

010 2030 4050 6070 8090100

% RH