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See our expert guide to choosing the best temperature sensors for DIY projects. Compare sensor types, specs, and makers' favourites available locally at Communica.
Understand differences between thermistors, DS18B20, DHT, and analog ICs.
Find sensors from trusted brands in stock for local purchase and quick pickup.
Guidance on choosing, wiring, and troubleshooting for South African conditions.
Temperature sensors are a must-have building block for hobbyists, students, and engineers prototyping climate monitors, automation, smart home projects, and data loggers. Choosing the right sensor ensures reliable readings whether you're building in a lab, garage, or field environment in South Africa. This guide compares the best types for Arduino, Raspberry Pi, and ESP32/ESP8266-based builds, with practical advice on integration and what's stocked locally at Communica.
| Sensor | Type | Interface | Typical Range | DIY Pros |
|---|---|---|---|---|
| NTC Thermistor | Resistive | Analog | -40 degreesC to 125 degreesC | Low cost, simple |
| DS18B20 | Digital IC | 1-Wire | -55 degreesC to 125 degreesC | Waterproof types, easy chaining |
| DHT11/DHT22 | Digital Module | Single-wire digital | 0 degreesC to 50 degreesC (DHT11), -40 degreesC to 80 degreesC (DHT22) | Humidity + temp, hobby-friendly |
| LM35, MCP9700 | Analog IC | Analog | -40 degreesC to 150 degreesC | Linear scaling, widely available |
| Infrared Sensor (MLX90614) | Contactless | I2C | -70 degreesC to 380 degreesC | Object/ambient measurement |
When comparing temperature sensors, focus on:
Popular brands and modules available from Communica include Adafruit, Microchip, Dallas/Maxim, and general Open Source DIY modules. Always check datasheets for each sensor's wiring and power requirements.
Application environment can influence your choice. For labs, classrooms, and indoor data logging (typical for most students and hobbyists), standard digital modules work well. For outdoor, greenhouse, or industrial settings, waterproofed (potted) sensors and wide temperature ranges are preferred. Communica also offers probe options and enclosures for environmental protection.
Here's an example using a DS18B20 with an Arduino (local stock widely available):
Wiring (DS18B20, TO-92 style):
Arduino +5V ---- VDD (red)
|
Arduino Pin 2 -- DQ (yellow)
|
Arduino GND ---- GND (black)
|
4.7kOhm resistor between VDD and DQ
Digital sensors need pull-up resistors (see datasheet) and often simple library support (e.g., OneWire, DallasTemperature for Arduino IDE).
For an LM35 outputting 10mV per degreesC, if your ADC reads 0.53V:
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They have mostly any electronic tool and components that you may require - Thanks to Nicole for helping me.
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Verified customerNicolene
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They have most every electronics component you might need. Staff are knowledgeable and friendly. I was looking for a bespoke miniature item for a lapt...
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I visit Communica once in a blue moon. Always wish i have more time to look at everything. Good & friendly service. Nothing wrong with a queuing syste...
Currently have only purchased items from their on-line store. Received what I ordered plus quick delivery. No complaints to date.
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I needed a heat-sensitive diode as one of my Philips appliances had had a failure. Philips wants you to throw the entire thing away, but I tried look...
I got the most pleasant service from Sydney and Windie
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Verified customerNicole was very helpfull and friendly.
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Verified customerFriendly service and a vast range of electronic components, devices etc.
Verified customerThe is a computerised quing system and you can pick n pay....but the problem is the is no lift and the only way to get up is using steps
Verified customerFor Sonoff ewelink WiFi switch.
Verified customerThank you for your patience ma'am Mpho
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Verified customerSomethings are getting pricey, but still a good place to pick up components
Verified customerNicole and Sydney were very helpful
Verified customerElectronic store for DIY electronics and prototyping guys. Doesn't look all that great but should have what you're looking for.
Verified customerA good electrical/electronic sales store packed with almost every component you require
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Verified customerExcellent, ask for Sydney. Solved immediately
Verified customerThey have everything you would need. Service is good
Verified customerBig electronic component shop. Counter can be very busy. Lots of parking.
Verified customerClose to closing time so i was in and out quickly
Verified customerAll the goodies in one place and Mohamed is always willing to help
Verified customerWide variety of electronic goods. Staff helpful with good advise.
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Verified customerVery helpfull. Thank you
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Verified customerExcellent service Nicole
Verified customerLarge selection, low on staff during lunch time when they are busy.
Verified customerGreat for your electronic needs - Prices are a bit expensive
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Verified customerDefinitely will have what you're looking for.
Verified customerCheap electronics and great educational goodies for the kids
Verified customergood selection of electronic supplies accessible
Verified customerGreat variety of stock on hand
Verified customerGood variety of electronic components available
Verified customerWide variety of electronic supplies available here
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Verified customerBig variety and good prices
Verified customerAll your electronics requirements under one roof, and more!
Verified customerThe place to go whatever your electrical and electronics needs.
Verified customerExcellent range of electronic products
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Verified customerLove everything here...
Verified customerGood range of products
Verified customerWhatever you need they have
Verified customerLarge number of electronic components
Verified customerCan spend hours in there
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Verified customerPlace if definite interest
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Verified customerWaiting time can be annoing.
Verified customerCommunica supplies semiconductors and electronic components to industries such as automotive, electrical, automation, mining, and education.
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