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Sauna Thermometers
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Sauna Hour Glass Timer Cedar
C$31.32
WHY CHOOSE NORTHERN LIGHTS?
100% Clear Western Red Cedar
Cedar has long been the premier sauna wood. Clear Cedar has no knots ensuring the longevity of our product products
Electric - Wood Fired - Infrared
The most heating choices to build your sauna. Choose from wood fired, infrared or our surgical stainless steel electric sauna heaters
Best Warranty
Our commitment to quality has been the conrner stone of our success. Our barrel saunas come complete with a full 5 year warranty.
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We are Sauna Enthusiast first and foremost. Give us a call and let us help discuss all your sauna needs.
Kolo Sauna Thermometer Aluminum, White - Finnish Sauna Accessories
C$116.73
- About Kolo Sauna Thermometer Aluminum - White Design From Finland The stylish aluminum and..
Rento Sauna Thermometer Aluminum, Tar - Finnish Sauna Accessories
C$93.17
- Sauna thermometer in tar-colored (dark brown) aluminum, designed by Rento (Finland). Reads in Celsiu..
Rento Sauna Thermometer/Hygrometer, Champagne - Finnish Sauna Accessories
C$104.72
- A combined thermometer-hygrometer for the sauna by Rento (Finland), in champagne-colored aluminum. R..
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SAUNA ACCESSORIES
Northern Light Barrel Saunas has a great source of Authentic Finnish Sauna Accessories from brands such as Sawo, Rento, Hukka and Onni. Sauna Accessories are great for enhancing your sauna experience.
SAUNA
TIMERS & THERMOSTATS
Controlling the temperature and humidity of a sauna is so important.Too hot and you will be forced to leaving resulting in a short session. Too cold and you won't reach your ideal temperature. Humidity and temperature go hand in hand in a sauna, so having both a sauna thermometer and a sauna hygrometer to measure the humidity is important. Timing your session with a traditional sand sauna timer is also important!
SAUNA THERMOMETER
Sauna Accessories
SAUNA TIMERS
Accessories
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Two readings tell you what's actually happening inside a sauna: temperature (how hot the air is) and humidity (how much moisture is in it). A thermometer gives you the first, a hygrometer gives you the second, and a combined unit does both. We stock 19 thermometers and hygrometers from $60 single-units up to $237 thermometer/hygrometer combo kits bundled with a bucket and ladle. All are rated for the 170-195°F service that breaks consumer-grade instruments.
Why both readings matter
Temperature alone is misleading. A sauna at 180°F with 5% humidity feels different from a sauna at 180°F with 25% humidity — the second feels far hotter on skin because moist air conducts heat better. Knowing the humidity tells you when to throw water on the rocks (low number means harsh, dry heat) and when to stop (very high humidity at high temp is genuinely unsafe).
Most safety guidance lands at 170-195°F with 10-30% humidity. The Finnish target is closer to 180°F at 20% with controlled löyly bursts. Both readings let you target deliberately rather than guess.
Thermometer types we stock
Wall-mounted analog (most common, $60-90 range): bimetallic coil, mechanical needle, no batteries, no electronics. Rento and Kolo brands. They tolerate the heat and humidity for decades because there's nothing to break. We sell them in aluminum (black, white, tar) for modern saunas and traditional cedar for classic interiors.
Wall-mounted analog with hygrometer (combined unit, $80-110): same construction but two needles on the same face — one for temp, one for humidity. Saves wall space and matches as a set.
Wooden traditional (cedar or aspen body, $70-90): the Scandinavian aesthetic. Functionally identical to aluminum.
Where to mount your thermometer
Eye-level when sitting on the upper bench, on the wall opposite or beside the heater. That's the air temperature the bather actually experiences. Mounting near the ceiling will read 15-25°F higher than where you sit. Mounting too low under the bench gives a meaningless reading.
Avoid direct sun if any window light hits the sauna interior — solar gain skews the reading. Avoid the wall directly above the heater for the same reason; the heater rises hot air past it and inflates the reading.
Hygrometers and what they tell you
Hygrometers in saunas use either a hair-tension element (old-school but reliable in heat) or a coil-spring mechanism. Both read relative humidity 0-100%. Throw water on the rocks and watch the needle climb — that's the löyly burst expressed as a number. Without water-on-rocks, a sauna's relative humidity sits at 5-15%; löyly briefly pushes it to 40-60% before the heat drives it back down.
If you want the humidity reading after a load of rock-water has dissipated rather than during the burst, wait 60-90 seconds before reading.
Combination kits (thermometer + hygrometer + bucket + ladle)
Buying the kit makes sense if you're outfitting a new sauna or replacing several items at once. The aluminum kits in champagne or tar finish bundle the matching bucket, ladle, and thermometer/hygrometer combo — saves $40-80 versus buying separately and the colours match. Most popular: the Rento full kit in champagne ($235).
Pair with sauna buckets if you only need replacement water-vessels, or accessories overview for the full kit-out list.
Digital timers and controllers
A digital sauna timer is separate from the thermometer/hygrometer — it controls the heater run-time and (on advanced models) setpoint temperature. Our Homecraft Digital Controllers ship paired with the larger electric heaters and offer pre-heat scheduling. The thermometer on the wall is just a passive readout; the controller is the active brain.
Frequently asked questions
Do I really need a thermometer in a sauna?
Practically, yes. You can't reliably judge 175°F vs 195°F by feel — the difference is small to perceive but large to your cardiovascular system. The thermometer keeps you in safe range and helps repeat what you liked from a previous session.
What's the difference between a thermometer and a hygrometer?
Thermometer reads air temperature. Hygrometer reads relative humidity. A combined unit has both needles on the same face.
Where should I mount the thermometer?
At eye level when seated on the upper bench, away from direct sun and not directly above the heater. That gives the most accurate reading of what the bather actually feels.
What temperature is right for a Finnish sauna?
170-195°F is the traditional range. 175-185°F is the most common setpoint. Above 200°F gets aggressive even for seasoned bathers; below 160°F doesn't reliably trigger the full thermoregulatory response.
What humidity should I target?
10-30% baseline. Brief löyly bursts can push briefly to 40-60% as water hits rocks, then settles back. Holding 40%+ at 195°F+ is genuinely uncomfortable for most people and increases dehydration risk.
