SHT1x / SHT7x
Humidity & Temperature Sensor

SHT7x

Evaluation Kit
Available

SHT1x- Relative humidity and temperature sensors- Dew point- Fully calibrated, digital output- Excellent long-term stability- No external components required- Ultra low power consumption- Surface mountable or 4-pin fully interchangeable- Small size
- Automatic power down

SHT1x / SHT7x Product Summary
The SHTxx is a single chip relative humidity andtemperature multi sensor module comprising a calibrated
digital output. Application of industrial CMOS processes withpatented micro-machining (CMOSens® technology) ensureshighest reliability and excellent long term stability. The
device includes a capacitive polymer sensing element for
relative humidity and a bandgap temperature sensor. Bothare seamlessly coupled to a 14bit analog to digital converter
and a serial interface circuit on the same chip. This results insuperior signal quality, a fast response time and insensitivity
to external disturbances (EMC) at a very competitive price.
Each SHTxx is individually calibrated in a precision humidity
chamber. The calibration coefficients are programmed into

the OTP memory. These coefficients are used internallyduring measurements to calibrate the signals from thesensors.
The 2-wire serial interface and internal voltage regulation
allows easy and fast system integration. Its tiny size and low
power consumption makes it the ultimate choice for eventhe most demanding applications.
The device is supplied in either a surface-mountable LCC(Leadless Chip Carrier) or as a pluggable 4-pin single-in-line
type package. Customer specific packaging options may beavailable on request.

Applications

Block Diagram_ HVAC_ Automotive_ Consumer Goods_ Weather Stations_ Humidifiers_ Dehumidifiers_ Test & Measurement_ Data Logging_ Automation_ White Goods_ Medical

SCK
DATA

D

i
-b
14

t

Ordering Information

A

Digital 2wire
Interface&
CRC
generator
GND

Humidity TemperaturePart
accuracy accuracy [K] Package
Number[%RH]@ 25 °C

Temp.
Sensor

SHT10

±4.5

±0.5

SMD (LCC)

SHT11

±3.0

±0.4

SMD (LCC)

SHT15

±2.0

±0.3

SMD (LCC)

SHT71

±3.0

±0.4

4-pin single-in-line

SHT75

±1.8

±0.3

4-pin single-in-line

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Calibration
Memory%RH
Sensor

Amplification

1

Sensirion

VDD

SHT1x / SHT7x Relative Humidity & Temperature Sensor System

1

Sensor Performance Specifications

Parameter

Conditions Min. Typ. Max. Units

Humidity
Resolution (1)0.58Repeatability
Accuracy (3)Uncertainty
Interchangeability
Nonlinearity
Range
Response time

0.03 0.03
12 12(2)±0.1
see figure 1

linearized

raw data
linearized
1/e (63%)

%RH
bit
%RH

Fully interchangeable
%RH
±3
<<1
%RH
0
100 %RH6810s

at 25°C, 1m/s air

Hysteresis
Long term stability

typical

±1
< 0.5

%RH
%RH/yr
°C
°F
bit
°C
°F

1/e (63%)

0.04 0.01 0.01
0.07 0.02 0.02
12 14
14
±0.1
±0.2
see figure 1
-40
123.8
-40
254.9
5
30

Temperature
Resolution (1)Repeatability
Accuracy (3)Range
Response Time
Table 1

2

°C
°F
s

Sensor Performance Specifications

Figure 1

Rel. Humidity, Temperature and Dewpoint accuracies

Interface Specifications
Vdd

GND

uC

DATA

(master)

SCK

SHT1x

I2C interfaces, see FAQ for details.

(slave)2.2.1 Serial clock input (SCK)The SCK is used to synchronize the communication between amicrocontroller and the SHTxx. Since the interface consists of fully
static logic there is no minimum SCK frequency.

Vdd 2.4 - 5.5V

Figure 2

Typical application circuit

2.1 Power Pins

2.2.2 Serial data (DATA)The SHTxx requires a voltage supply between 2.4 and 5.5 V. After
powerup the device needs 11ms to reach its “sleep” state. No
commands should be sent before that time.
Power supply pins (VDD, GND) may be decoupled with a 100 nF
capacitor.

The DATA tristate pin is used to transfer data in and out of thedevice. DATA changes after the falling edge and is valid on therising edge of the serial clock SCK. During transmission the DATA
line must remain stable while SCK is high. To avoid signal
contention the microcontroller should only drive DATA low. An
external pull-up resistor (e.g. 10 kΩ ) is required to pull the signal
high. (See Figure 2) Pull-up resistors are often included in I/Ocircuits of microcontrollers.
See Table 5 for detailed IO characteristics

2.2 Serial Interface (Bidirectional 2-wire)
The serial interface of the SHTxx is optimized for sensor readout
and power consumption and is not compatible with(1)
(3)

The default measurement resolution of 14bit (temp.) and 12bit (humidity) can be reduced to 12 and 8 bit through the status register. (2) Effective number of bits is 11bit.
Each SHTxx is tested to be fully within accuracy specifications at 25°C (77°F) and 3.3V.

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SHT1x / SHT7x Relative Humidity & Temperature Sensor System

2.2.3 Sending a command
To initiate a transmission, a “Transmission Start” sequence
has to be issued. It consists of a lowering of the DATA line
while SCK is high, followed by a low pulse on SCK andraising DATA again while SCK is still high.

DATA
SCK
Figure 3"Transmission Start" sequence

The subsequent command consists of three address bits
(only “000” is currently supported) and five command bits.
The SHTxx indicates the proper reception of a command bypulling the DATA pin low (ACK bit) after the falling edge ofthe 8th SCK clock. The DATA line is released (and goeshigh) after the falling edge of the 9th SCK clock.
Command
Code
Reserved
0000x
Measure Temperature
00011
Measure Humidity
00101
Read Status Register
00111
Write Status Register
00110
Reserved
0101x-1110x
Soft reset, resets the interface, clears the 11110
status register to default values
wait minimum 11 ms before next command
Table 2

therefore the controller can continue with other tasks andreadout as convenient.
Two bytes of measurement data and one byte of CRC
checksum will then be transmitted. The uC mustacknowledge each byte by pulling the DATA line low. All
values are MSB first, right justified. (e.g. the 5th SCK is MSB
for a 12bit value, for a 8bit result the first byte is not used).
Communication terminates after the acknowledge bit of the
CRC data. If CRC-8 checksum is not used the controller may
terminate the communication after the measurement data
LSB by keeping ack high.
The device automatically returns to sleep mode after themeasurement and communication have ended.
Warning: To keep self heating below 0.1 °C the SHTxx
should not be active for more than 10% of the time(e.g. max. 2 measurements / second for 12bit accuracy).

2.2.5 Connection reset sequence
If communication with the device is lost the following signal
sequence will reset its serial interface:
While leaving DATA high, toggle SCK 9 or more times. This
must be followed by a “Transmission Start” sequence
preceding the next command. This sequence resets theinterface only. The status register preserves its content.

DATA
Transmission Start

SHTxx list of commands

2.2.4 Measurement sequence (RH and T)

SCK

After issuing a measurement command (‘00000101’ for RH,‘00000011’ for Temperature) the controller has to wait for themeasurement to complete. This takes approximately
11/55/210 ms for a 8/12/14bit measurement. The exact timevaries by up to ±15% with the speed of the internal oscillator.
To signal the completion of a measurement, the SHTxx pulls
down the data line and enters idle mode. The controller must
wait for this “data ready” signal before restarting SCK toreadout the data. Measurement data is stored until readout,

Figure 4

Figure 5

1

2

3

4 -8

9

Connection reset sequence

2.2.6 CRC-8 Checksum calculation
The whole digital transmission is secured by a 8 bitchecksum. It ensures that any wrong data can be detected
and eliminated.
Please consult application note “CRC-8 Checksum
Calculation” for information on how to calculate the CRC.

Example RH measurement sequence for value “0000’1001 ’ 0011’0001”= 2353 = 75.79 %RH (without temperature compensation)www.sensirion.com

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SHT1x / SHT7x Relative Humidity & Temperature Sensor System

Figure 6

Overview of Measurement Sequence (TS = Transmission Start)

2.3 Status Register
Some of the advanced functions of the SHTxx are available
through the status register. The following section gives abrief overview of these features. A more detailed description
is available in the application note “Status Register”

after switching on the heater, proper functionality of both
sensors can be verified.
• In high (>95 %RH) RH environments heating the sensor
element will prevent condensation, improve responsetime and accuracy
Warning: While heated the SHTxx will show higher
temperatures and a lower relative humidity than with noheating.

2.4 Electrical Characteristics(1)Figure 7

Status Register Write

Figure 8

Status Register Read

Bit Type
7
6
R

Description
reserved
End of Battery (low voltage detection)‘0’ for Vdd > 2.47
‘1’ for Vdd < 2.47

5
4
3
2
1
0

reserved
reserved
For Testing only, do not use
Heaterno reload from OTP’1’ = 8bit RH / 12bit Temperature resolution’0’ = 12bit RH / 14bit Temperature resolution

R/W
R/W
R/W

Table 3

VDD=5V, Temperature = 25 °C unless otherwise noted
Parameter
Power supply DC
Supply current

Default
0
X No default value,
bit
is
only
updated after ameasurement
0
0
0
0 off
0 reload
0 12bit RH
14bit Temp.

Status Register Bits

2.3.1 Measurement resolution
The default measurement resolution of 14bit (temperature)and 12bit (humidity) can be reduced to 12 and 8bit. This isespecially useful in high speed or extreme low power
applications.

Min. Typ. Max. Units
2.4
5 5.5(2) V
measuring
550
μA
average2(3) 28(4)
μA
sleep
0.3
1 μA
Low level output voltage
020% VddHigh level output voltage
75%
100% Vdd
Low level input voltage Negative going 0
20% VddHigh level input voltage Positive going 80%
100% Vdd
Input current on pads
1 μA
Output peak currenton
4 mA
Tristated (off)10μA

Table 4

Conditions

SHTxx DC Characteristics

Parameter
FSCK SCK frequency

Conditions
Min Typ. Max. Unit
VDD > 4.5 V
10 MHz
VDD < 4.5 V
1 MHz
TRFO DATA fall time
Output load 5 pF
3.5 10 20 ns
Output load 100 pF 30 40 200 ns
TCLx SCK hi/low time
100
ns
TV
DATA valid time250
ns
TSU DATA set up time100ns
THO DATA hold time
0 10
ns
TR/TF SCK rise/fall time
200
ns

Table 5

SHTxx I/O Signals Characteristics

Figure 9

Timing Diagram

2.3.2 End of Battery
The “End of Battery” function detects VDD voltages below
2.47 V. Accuracy is ±0.05 V

2.3.3 Heater
An on chip heating element can be switched on. It will
increase the temperature of the sensor by 5-15 °C (9-27 °F).
Power consumption will increase by ~8 mA @ 5 V.
Applications:
By comparing temperature and humidity values before and
(1)
(2)
(3)
(4)

Parameters are periodically sampled and not 100% tested
Recommended voltage supply for highest accuracy is between 2.4…3.6V, due to sensor calibration at 3.3V.
With one measurement of 8 bit accuracy without OTP reload per second
With one measurement of 12bit accuracy per second

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SHT1x / SHT7x Relative Humidity & Temperature Sensor System

3

Converting Output to Physical Values

3.1 Relative Humidity

3.2 Temperature

To compensate for the non-linearity of the humidity sensor
and to obtain the full accuracy it is recommended to convert
the readout with the following formula 1 :RHlinear = c 1 + c 2 • SORH + c 3 • SORH 2

The bandgap PTAT (Proportional To Absolute Temperature)temperature sensor is very linear by design. Use thefollowing formula to convert from digital readout totemperature:

SORH
c1
c2
c3
12 bit-40.0405-2.8 * 10-6
8 bit
-4
0.648
-7.2 * 10-4
Table 6 Humidity conversion coefficients

For simplified, less computation intense conversion formulas
see application note “RH and Temperature Non-Linearity
Compensation”.
Values higher than 99% RH indicate fully saturated air andmust be processed and displayed as 100% 2 RH.
The humidity sensor has no significant voltage dependency.

Temperature = d1 + d 2 • SOT

VDD
5V
4V
3.5V(3)3V( 3 )
2.5V(3)
Table 8d1 [°C]d1 [°F]SOT
d2 [°C] d2 [°F]-40.00-40.00
14bit
0.01
0.018
-39.75-39.55
12bit
0.04
0.072
-39.66-39.39-39.60-39.28-39.55-39.19Temperature conversion coefficients

For improved accuracies in extreme temperatures with morecomputation intense conversion formulas see applicationnote “RH and Temperature Non-Linearity Compensation”.

3.3 Dewpoint
Since humidity and temperature are both measured on thesame monolithic chip, the SHTxx allows superb dewpoint
measurements. See application note “Dewpoint calculation”
for more.

Figure 10 Conversion from SORH to relative humidity

3.1.1 Humidity Sensor RH/Temperature compensation
For temperatures significantly different from 25 °C (~77 °F)
the temperature coefficient of the RH sensor should beconsidered:

RHtrue = (T°C - 25) • (t1 + t 2 • SORH ) + RHlinear

SORH
t1
t2
12 bit0.01
0.00008
8 bit
0.01
0.00128
Table 7 Temperature compensation coefficients

This equals ~0.12 %RH / °C @ 50 %RH

1 Where SORH is the sensor output for relative humidity
2 If wetted excessively (strong condensation of water on sensor surface),
sensor output signal can drop below 100%RH (even below 0%RH) insome cases, but sensor will recover completely when water droplets
evaporate. Sensor is not damaged by water immersion or condensation.

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3 For improved temperature accuracy with SHTxx-V4 set d1
for 3.5V: d1[°C]_3.5V=-39.60 / d1[°F]_3.5V=-39.28;
for 3V: d1[°C]_3V=-39.50 / d1[°F]_3V=-39.10;
for 2.5V: d1[°C]_2.5V=-39.45 / d1[°F]_2.5V=-39.01

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4

Applications Information

4.1 Operating and Storage Conditions

4.6 Light
The SHTxx is not light sensitive. Prolonged direct exposure
to sunshine or strong UV radiation may age the housing.

4.7

Figure 11 Recommended operating conditions

Conditions outside the recommended range may temporarily
offset the RH signal up to ±3 %RH. After return to normal
conditions it will slowly return towards calibration state byitself. See 4.3 “Reconditioning Procedure” to accelerate thisprocess. Prolonged exposure to extreme conditions may
accelerate ageing.

4.2 Exposure to Chemicals
Chemical vapors may interfere with the polymer layers used
for capacitive humidity sensors. The diffusion of chemicals
into the polymer may cause a shift in both offset andsensitivity. In a clean environment the contaminants willslowly outgas. The reconditioning procedure described
below will accelerate this process. High levels of pollutants
may cause permanent damage to the sensing polymer.

4.3 Reconditioning Procedure
The following reconditioning procedure will bring the sensor
back to calibration state after exposure to extreme conditions
or chemical vapors.
80-90 °C (176-194°F) at < 5 %RH for 24h (baking) followed by
20-30 °C (70-90°F) at > 74 %RH for 48h (re-hydration)

4.4 Temperature Effects
The relative humidity of a gas strongly depends on its
temperature. It is therefore essential to keep humidity
sensors at the same temperature as the air of which therelative humidity is to be measured.
If the SHTxx shares a PCB with electronic components thatgive off heat it should be mounted far away and below theheat source and the housing must remain well ventilated.
To reduce heat conduction copper layers between the
SHT1x and the rest of the PCB should be minimized and aslit may be milled in between (see figure 13).

4.5 Membranes
A membrane may be used to prevent dirt from entering the
housing and to protect the sensor. It will also reduce peakconcentrations of chemical vapors. For optimal response
times air volume behind the membrane must be kept to aminimum. For the SHT1x package Sensirion recommends
the SF1 filter cap for optimal IP67 protection.
(1)

Materials Used for Sealing / Mounting

Many materials absorb humidity and will act as a buffer,increasing response times and hysteresis. Materials in thevicinity of the sensor must therefore be carefully chosen.
Recommended materials are: All Metals, LCP, POM (Delrin),
PTFE (Teflon), PE, PEEK, PP, PB, PPS, PSU, PVDF, PVF.
For sealing and gluing (use sparingly): High filled epoxy forelectronic packaging (e.g. glob top, underfill), and Silicone.
Outgassing of these materials may also contaminate the
SHTxx (cf. 4.2). Store well ventilated after manufacturing or
bake at 50°C for 24h to outgas contaminants before
packing.

4.8 Wiring Considerations and Signal Integrity
Carrying the SCK and DATA signal parallel and in close
proximity (e.g. in wires) for more than 10cm may result incross talk and loss of communication. This may be resolved
by routing VDD and/or GND between the two data signals.
Please see the application note “ESD, Latchup and EMC” formore information.
Power supply pins (VDD, GND) should be decoupled with a
100 nF capacitor if wires are used.

4.9 Qualifications
Extensive tests were performed in various environments.
Please contact SENSIRION for detailed information.
Environment

Norm

Temperature
JESD22-A104-B
Cycles-40 °C / 125 °C, 1000 cy
HAST
JESD22-A110-B
Pressure Cooker 2.3 bar 125 °C 85 %RH
High Temperature JESD22-A101-B
and Humidity
85 °C 85 %RH 1250h
Salt Atmosphere
DIN-50021ss
Condensing Air
Freezing cycles-20 / +90 °C, 100 cy
30min dwell time
fully submerged
Various Automotive DIN 72300-5
Chemicals
Table 9Results(1)WithinSpecifications
Reversible shiftby +2 %RH
Reversible shiftby +2 %RH
Within Spec.
Within Spec.
Reversible shiftby +2 %RH
WithinSpecifications

Qualification tests (excerpt)

4.10 ESD (Electrostatic Discharge)
ESD immunity is qualified according to MIL STD 883E,
method 3015 (Human Body Model at ±2 kV)).
Latch-up immunity is provided at a force current of ±100 mA
with Tamb = 80 °C according to JEDEC 17. See applicationnote “ESD, Latchup and EMC” for more information.

The temperature sensor passed all tests without any detectable drift. Package and electronics also passed 100%

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SHT1x / SHT7x Relative Humidity & Temperature Sensor System

5

Package Information

5.1 SHT1x (surface mountable)
Pin
1
2
3
4

Name
GND
DATA
SCK
VDD
NC

Comment
GroundSerial data, bidirectional
Serial clock, input
SupplyRemaining pins must be left unconnected

Table 10 SHT1x Pin Description

For manual soldering contact time must be limited to 5
seconds at up to 350 °C.
After soldering the devices should be stored at >74 %RH forat least 48h to allow the polymer to rehydrate.
Please consult the application note “Soldering procedure” formore information.

5.1.4 Mounting Examples

5.1.1 Package type
The SHT1x is supplied in a surface-mountable LCC(Leadless Chip Carrier) type package. The sensors housing
consists of a Liquid Crystal Polymer (LCP) cap with epoxy
glob top on a standard 0.8 mm FR4 substrate. The device is
free of Pb, Cd and Hg. (Fully RoHS, WEEE compliant)Device size is 7.42 x 4.88 x 2.5 mm (0.29 x 0.19 x 0.1 inch)
Weight 100 mg
For SHT1x-V3 the production date “wwy” (SHT1x-V4: lot
number) is printed onto the sensor cap in white colored 3digit alphanumeric numbers.

5.1.2 Delivery Conditions
The SHT1x are shipped in 12mm tape at 100pcs or 400pcs.
(SHT10 at 2000pcs only). Reels are individually labelled withbarcode and human readable labels. The lot numbers allow
full traceability through production, calibration and test.

Slit to minimize heattransfer from the PCB

Figure 13 SHT1x PCB Mounting example

The SF1 membrane filter cap is available for optimal IP67
protection. When mounted through a housing the interior canbe protected from the environment while still allowing highquality humidity measurements (see example below).
o-ringhousing

housing

Filtercap
SHT1x

PCB

Figure 12 Tape configuration and unit orientation
melted plastic pin

5.1.3 Soldering Information
Standard reflow soldering ovens may be used. For details
please see application note “soldering procedure”.
Top View
1.17
±0.05

1.9
±0.1

Figure 14 SF1 IP67 filter cap mounting example

Side View

Recommended PCB Footprint

1.5
±0.1

1.8
(0.07)

actual size

4.93 ±0.05

3.48 (0.137)
7.08 (0.278)

1.27 1.27 1.27
(0 05)

No copper inside this field

1.83

2.46
±0.05

0.47
(0.018)NC

0.8(0.03)

4

4.61 (0.2)

NC

0.8
±0.08

3

2.5 ±0.1

NC

0.6

2

±0.1

NC

5.2 ±0.1

1

4 ±0.1

±0.05

NC

±0.05

7.47 ±0.05
6.9 ±0.05
1.27

sensor openingNC

1.8(0.07)

Figure 15 SHT1x drawing and footprint dimensions in mm (inch)
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5.2 SHT7x (4-pin single-in-line)
Pin
1
2
3
4

Name
SCK
VDD
GND
DATA

Comment
Serial clock input
SupplyGroundSerial data bidirectional

Table 11 SHT7x Pin Description

5.2.1 Package type 1
The device is supplied in a single-in-line pin type package.
The sensor housing consists of a Liquid Crystal Polymer(LCP) cap with epoxy glob top on a standard 0.6 mm FR4
substrate. The device is free of Pb, Cd and Hg. (Fully
RoHS, WEEE compliant)
The sensor head is connected to the pins by a small bridge
to minimize heat conduction and response times. The gold
plated back side of the sensor head is connected to the GND
pin.
A 100nF capacitor is mounted on the back side between
VDD and GND.
All pins are gold plated to avoid corrosion. They can besoldered or mate with most 1.27 mm (0.05’’) sockets
e.g.: Preci-dip / Mill-Max 851-93-004-20-001 or similar
Total weight: 168 mg, weight of sensor head: 73 mg
For SHT7x-V3 the production date “wwy” (SHT1x-V4: lot
number) is printed onto the sensor cap in white colored 3digit alphanumeric numbers.

5.2.2 Delivery Conditions

Figure 17 SHT7x dimensions in mm (inch)

The SHT7x are shipped in 32 mm tape. These reeled partsin standard option are shipped with 500 units per 13 inch
diameter reel. Reels are individually labelled with barcodeand human readable labels.

After wave soldering the devices should be stored at>74 %RH for at least 24 h to allow the polymer to rehydrate.
Please consult the application note “Soldering procedure” formore information.

Figure 16 Tape configuration and unit orientation

5.2.3 Soldering Information 2Standard wave SHT7x soldering ovens may be used at
maximum 235 °C for 20 seconds.
For manual soldering contact time must be limited to 5
seconds at up to 350 °C.

1 Other packaging options may be available on request.
2 For maximum accuracy do not solder SHT75!

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6

Revision history

Date
February 2002
June 2002
March 2003
July 2004
April 2005
May 2005
March 2006
March 2007

VersionPage(s) Changes
Preliminary 1-9First public release
Preliminary
Added SHT7x information
Final v2.0 1-9
Major remake, added application information etc.
Various small modifications
V2.01
1-9
Typos, Graph labeling
V2.02
1-9
Improved specifications, added SF1 information, improved wording
V2.03
1-2
Added SHT10 information
V2.04
1-9
Changed company address
V2.05
1-10
Changed disclaimer
V3.00
1-10
Data sheet valid for SHTxx-V4 and SHTxx-V3

The latest version of this document and all application notes can be found at:www.sensirion.com/humidity

7

Important Notices

7.1 Warning, personal injury
Do not use this product as safety or emergency stop
devices or in any other application where failure of the
product could result in personal injury. Do not use thisproduct for applications other than its intended andauthorized use. Before installing, handling, using orservicing this product, please consult the data sheet
and application notes. Failure to comply with these
instructions could result in death or serious injury.
If the Buyer shall purchase or use SENSIRION products for any
unintended or unauthorized application, Buyer shall defend,
indemnify and hold harmless SENSIRION and its officers,
employees, subsidiaries, affiliates and distributors against all
claims, costs, damages and expenses, and reasonable attorneyfees arising out of, directly or indirectly, any claim of personal
injury or death associated with such unintended or unauthorizeduse, even if SENSIRION shall be allegedly negligent with respect
to the design or the manufacture of the product.

7.2 ESD Precautions
The inherent design of this component causes it to be sensitive toelectrostatic discharge (ESD). To prevent ESD-induced damage
and/or degradation, take customary and statutory ESD
precautions when handling this product.
See application note “ESD, Latchup and EMC” for more
information.

7.3 Warranty
SENSIRION warrants solely to the original purchaser of thisproduct for a period of 12 months (one year) from the date ofdelivery that this product shall be of the quality, material andworkmanship defined in SENSIRION’s published specifications of
the product. Within such period, if proven to be defective,
SENSIRION shall repair and/or replace this product, in
SENSIRION’s discretion, free of charge to the Buyer, provided
that:• notice in writing describing the defects shall be given to
SENSIRION within fourteen (14) days after their appearance;www.sensirion.com• such defects shall be found, to SENSIRION’s reasonablesatisfaction, to have arisen from SENSIRION’s faulty design,material, or workmanship;• the defective product shall be returned to SENSIRION’s
factory at the Buyer’s expense; and• the warranty period for any repaired or replaced product shallbe limited to the unexpired portion of the original period.
This warranty does not apply to any equipment which has notbeen installed and used within the specifications recommended by
SENSIRION for the intended and proper use of the equipment.
EXCEPT FOR THE WARRANTIES EXPRESSLY SET FORTHHEREIN, SENSIRION MAKES NO WARRANTIES, EITHER
EXPRESS OR IMPLIED, WITH RESPECT TO THE PRODUCT.
ANY AND ALL WARRANTIES, INCLUDING WITHOUT
LIMITATION, WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSLYEXCLUDED AND DECLINED.
SENSIRION is only liable for defects of this product arising under
the conditions of operation provided for in the data sheet andproper use of the goods. SENSIRION explicitly disclaims all
warranties, express or implied, for any period during which thegoods are operated or stored not in accordance with the technicalspecifications.
SENSIRION does not assume any liability arising out of any
application or use of any product or circuit and specificallydisclaims any and all liability, including without limitationconsequential or incidental damages. All operating parameters,
including without limitation recommended parameters, must be
validated for each customer’s applications by customer’s technicalexperts. Recommended parameters can and do vary in different
applications.
SENSIRION reserves the right, without further notice, (i) to change
the product specifications and/or the information in this documentand (ii) to improve reliability, functions and design of this product.
Copyright© 2007, SENSIRION.
CMOSens® is a trademark of Sensirion
All rights reserved.

v3.00 March 2007

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SHT1x / SHT7x Relative Humidity & Temperature Sensor System

Headquarters and Sales Office
SENSIRION AG
Laubisruetistr. 50
CH-8712 Staefa ZH
Switzerland

Phone: + 41 (0)44 306 40 00
Fax:+ 41 (0)44 306 40 30
e-mail: info@sensirion.com
http://www.sensirion.com/

SENSIRION Inc
Westlake Pl. Ctr. I, suite 2402801 Townsgate Road
Westlake Village, CA 91361
USA

Phone: 805-409 4900
Fax:
805-435 0467
e-mail: michael.karst@sensirion.com
http://www.sensirion.com/

www.sensirion.com

v3.00 March 2007

Sensirion humidity sensors are available from:find your local representative at:www.sensirion.com/reps

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