Match the reference to the application.
You need an identified DS18B20 on a compatible 1-Wire host. Review resolution, conversion timing and the chosen power arrangement.
Review the specification →GUILCOR · Digital sensing
DS18B20
temperature sensors
A programmable digital thermometer for distributed temperature measurement. Choose the resolution, power arrangement and complete probe construction around the application, rather than treating a digital output as a guarantee of measurement accuracy.
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Understand the reference
Balance resolution and update time.
The temperature register is a signed 16-bit word with a scale of 1/16 °C. At lower resolutions, mask the undefined low bits as specified in the datasheet. Resolution changes the output step and conversion duration; it does not create a new accuracy specification.
SELECTION / YOUR APPLICATION
Is DS18B20 the right starting point?
Review DS18S20 alongside DS18B20.
Compare the sensing function, power arrangement, command set and conversion timing. A common 1-Wire bus does not make all devices equivalent to the host software.
Explore DS18S20 →Keep the complete specification together.
Keep the full device reference, host implementation and wiring layout. Check supply or parasite power, conversion requirements and how individual devices are identified.
Prepare your enquiry →These links support a specification review. They do not establish interchangeable parts or availability of a complete assembly.
Interactive application guide
How much conversion time fits your update cycle?
Input range: 9 to 12Input range: 1 to 60000
Compare the maximum IC conversion time with your requested cycle. The remaining time must cover addressing, reads, retries and application work; this is not the thermal response time of the probe.
Temperature step
Maximum conversion time
Time left in the cycle
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Step = 0.5 / 2^(bits − 9); tconv,max = 93.75 × 2^(bits − 9) ms
Technical reference
Reference details for the application.
| IC temperature range | −55 to +125 °C |
|---|---|
| Accuracy interval | ±0.5 °C from −10 to +85 °C |
| Resolution | 9, 10, 11 or 12 bits |
| Temperature step | 0.5 to 0.0625 °C |
| Conversion time, maximum | 93.75 to 750 ms |
| External supply | 3.0 to 5.5 V |
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.
HVAC, tanks, equipment and embedded monitoring are possible contexts when the chosen sheath, cable and controller meet the installation requirements.
Wiring and power
Specify wiring, power and the host together.
Device connections
Connect DQ and GND plus VDD for external power. In parasite mode the ordinary DS18B20 requires VDD tied to GND and a strong pullup for conversion and EEPROM operations. Use external power for applications above +100 °C.
Bus integration
Choose the pullup and master from the selected device requirements and measured network behaviour. A resistor value taken from an example is not a universal design rule. Check logic levels, ground reference, noise exposure and the voltage at the furthest sensor.
Cable colours and a familiar package are not a pinout. Use the connector drawing and exact part document. Record the relationship between each ROM identity and its installed location; update that mapping after replacement.
Acquisition sequence
Make each reading traceable.
Discover
Inventory the bus and select the intended device identity.
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 scale, location mapping 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.
Is 0.0625 °C the measurement accuracy?
No. It is the output step at 12-bit resolution. The sensor error, thermal coupling, gradients and installation effects form a separate measurement budget.
Does 1-Wire literally need only one conductor?
Communication needs the data line and a ground reference. External power can add a supply conductor; parasite power has specific strong-pullup and timing requirements.
How many sensors can share the cable?
Addressing supports multiple devices, but the practical limit depends on the master, loading, wiring, power and timing. Validate the actual network rather than selecting a count from the protocol name.
What should I send for a probe quotation?
Send the reference, temperature interval, required error and response, mounting drawing, cable and connector details, host interface, quantity and any calibration requirement.
Technical sources
Continue with the reference documents.
GUILCOR / YOUR ENQUIRY
Define your DS18B20 enquiry.
Send the device reference, host and wiring arrangement together. Include how the sensor is powered and how measurements are scheduled across the bus.
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 1-Wire host
Exact device reference, host or master, supply arrangement, pullup implementation, command support and required update interval.
02
Measurement conditions
Measured quantity, temperature interval, required accuracy, conversion timing, sensor count and identification or position requirements.
03
Assembly and connection
Cable lengths, topology and branches, connector and grounding, probe mounting, materials and environmental exposure.
04
Project and validation
Sample and production quantities, target delivery, calibration or documentation needs, and the checks required before approval.