Match the reference to the application.
The design specifies SHT85 temperature and humidity measurement. Review the airflow path and installation as well as electronic conversion timing.
Review the specification →GUILCOR · Digital sensing
SHT85
temperature and humidity sensor
SHT85 provides digital humidity and temperature measurement over I²C with a protected sensing opening. The enclosure and air path remain important because a protected opening must still exchange air with the measured environment.
Understand the reference
Allow air access and evaluate the installed response.
Electronic conversion and exchange of heat or moisture are different processes. A closed housing, contamination or nearby heat source can dominate the response observed by the application.
SELECTION / YOUR APPLICATION
Is SHT85 the right starting point?
Review SHT75 alongside SHT85.
Compare the humidity and temperature channels, host interface, electrical requirements and installation. The enclosure and exposure of the sensing opening are part of the selection.
Explore SHT75 →Keep the complete specification together.
Keep the exact device and host-driver references. Check commands, data conversion, connector and protective opening as well as the required measurement interval.
Prepare your enquiry →These links support a specification review. They do not establish interchangeable parts or availability of a complete assembly.
Interactive application guide
Visualize a first-order humidity response.
Input range: 0 to 120
An illustrative model uses the typical 8-second humidity time constant. Real response depends on airflow, enclosure and conditions; this is not a guaranteed settling time.
Fraction of step reached
Fraction remaining
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fraction reached = 1 − exp(−time / 8 s)
Technical reference
Reference details for the application.
| Operating interval | −40 to +105 °C; humidity conditions must also be respected |
|---|---|
| Interface / supply | I²C / 2.15 to 5.5 V |
| Typical headline accuracy | ±1.5 % RH and ±0.1 °C; consult the applicable curves |
| Humidity response | Typical 63% response time: 8 seconds |
| Protection | PTFE membrane at the sensor opening; not an enclosure IP rating |
Apply the limits to the right component.
The sensing IC, finished probe and host electronics have separate requirements. Cable insulation, sealing, connector, supply and mounting may impose a narrower operating range. A temperature step is not an accuracy guarantee, and an electronic conversion time is not a thermal response time.
When specifying a room or duct probe, include the housing openings and airflow in response testing. Do not extend the membrane protection statement to connectors, PCB or the entire probe.
Wiring and integration
Specify the electrical interface and sensing path.
Device connections
Provide compatible I²C pullups and verify supply, pinout and command handling. Keep the membrane opening exposed to a representative air path while protecting the complete assembly appropriately.
Host and installation checks
Match the electrical levels and the actual protocol at both ends. Confirm signal direction, grounding, pinout and any required transceiver. The interface name alone does not determine cable length, immunity or sensor accuracy.
Plan startup, conversion completion, timeout and recovery. Check integrity information where provided and retain the time of the last valid acquisition. Successful communication does not prove that the physical measurement has settled.
Acquisition sequence
Make each reading traceable.
Discover
Confirm the part, interface, supply and measurement mode.
Convert
Issue the device-specific command and satisfy its timing and power needs.
Validate
Read the correct registers, check CRC where provided and reject invalid or stale results.
Use
Apply the correct decoder or compensation, units and application limits.
Measurement quality
Separate electrical behaviour from thermal performance.
Accuracy and calibration
Choose the error limit over the actual operating interval. Add installation and readout effects. Define any calibration and periodic verification required by the application; factory calibration does not establish a universal no-maintenance policy.
Response and mounting
A sheath, potting material and mounting contact change how fast the sensing element follows the medium. Verify response in the intended flow and installation, rather than using conversion time as the finished-probe response.
Power and self-heating
Average dissipation depends on supply, conversion duty and surrounding electronics. Test the assembled probe at the intended reading rate. Do not assume a universal self-heating offset from the interface name.
Form factor library
Choose your probe format.
Choose the shape and mounting for the measurement point. These are GUILCOR probe families and a design service; confirm the compatible element, dimensions, cable and complete assembly for the selected reference.
Frequently asked questions
Questions before specifying the assembly.
Does the membrane make the whole assembly IP67?
No. The sensor-opening protection does not establish the rating of the complete probe or enclosure. Validate the assembled product separately.
Are serial sensor interfaces interchangeable?
No. Match the electrical levels, protocol, timing and commands for the actual reference. Similar connector shapes or wire counts do not establish compatibility.
Does the interface determine measurement accuracy?
No. The sensor, conversion circuit, calibration and installation determine the measurement performance. Specify these separately from the communication interface.
What should I send for a probe quotation?
Send the reference and full ordering code, measured quantities, operating interval, error and response requirements, mounting drawing, cable and connector, host interface and quantity.
Technical sources
Continue with the reference documents.
GUILCOR / YOUR ENQUIRY
Define your SHT85 enquiry.
Describe both the electrical interface and the air reaching the sensor. Include the enclosure, airflow and exposure conditions when requesting an assembled probe.
Missing a reference or datasheet?
Send the component marking, equipment reference and any photographs or documents you have. These provide a starting point for identifying what must be confirmed.
The outline helps prepare your enquiry. Copying it does not send a request.
FOUR DETAILS THAT MOVE THE DISCUSSION FORWARD
01
Device and host
Exact device or module, interface, host or driver, supply and logic levels, addressing or wiring and measurement commands.
02
Measurement conditions
Temperature and humidity intervals, required accuracy and update rate, airflow, condensation risk, contamination and any additional measured quantities.
03
Assembly and connection
Sensing opening or filter, enclosure and ventilation, mounting location, nearby heat sources, connector and cable arrangement.
04
Project and validation
Sample and production quantities, target delivery, calibration or documentation needs, and the checks required before approval.