Honeywell TS33C Temperature and Humidity Sensor with LCD Review

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(More customer reviews)I bought this to add to my Honeywell TM005X Wireless Thermo-Hygrometer which can monitor up to 3 remote stations.
I had purchased a wireless therm-hygro unit from WalMart earlier this year, but wasn't impressed with the quality and their accuracy. Took them back and ordered the TM005X with this additional remote. IMHO, the Honeywell units are much better.
I have the base station and 2 remotes. I've installed new foam insulation and an unvented roof in my new remodel. I use them to monitor temp and humidity in my basement, main floor and attic.
You line them up in the same room and the temps are all within 1 to 1.5 degs and the RH are within 2% to 3% of each other. I haven't calibrated the units yet, but so far I'd consider them a pretty good value.

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The Honeywell TS33C Temperature and Humidity Sensor with LCD can be used indoors out outdoors and features a LCD display that shows the current temperature and humidity reading. It can be used alone or with any Honeywell Weather Station that supports multiple remote sensors.

The Honeywell TS33C Temperature and Humidity Sensor. Features a LCD Display.

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La Crosse Technology TX28U-IT 915 MHz Wireless Thermo-Hygro Sensor Review

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(More customer reviews)Very dependable and accurate readings, batteries last a good length of time. My only issue is with the "connection" to the base unit. The base unit requires batteries (no option for plugging it in) and when the base unit batteries need replacing then all remote sensors need resetting as well - very time consuming.

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Monitor outdoor weather conditions in every corner of the yard by adding an extra wireless temperature and humidity sensor to a household La Crosse Technology weather system. The TX28U-IT wireless thermo-hygro sensor transmits temperature and humidity readings to a base unit to enable users to plan appropriately for brisk, hot, or damp weather. For use with any La Crosse 915 MHz Instant Transmission wireless weather systems, the weather-resistant sensor communicates to the base every 4 seconds from a distance of up to 330 feet unobstructed. Outdoor temperature measurement capabilities range from -39.9 to +139.8 degrees F, while humidity levels assessed range from 1 to 99 percent. The sensor\'s small LCD screen alternates between displaying the current temperature and current humidity data. To ensure the most accurate readings, install the sensor out of direct rain and sunlight; the sensor can conveniently be mounted upright or on a wall. The sensor requires the separate purchase of two AA batteries to operate. A limited one-year warranty covers this item. The sensor measures 1-3/4 inches wide by 1 inch deep by 6-1/4 inches high and weighs 1 pound upon shipping.

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Digital Humidity Temperature Monitor Thermometer by Sper Scientific Review

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(More customer reviews)This is a nice unit and very accurate but for the price, I'm sure you can get something better or something similar but at much lower price.

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Simultaneously monitors both temperature and humidity on an extra large 3-3/16 x 2-1/2" dual display which can be read from across a room. For labs, chemical storage areas, clean rooms, stock rooms, warehouses, factories, greenhouses, and outdoors. Monitor humidity and temperature in desiccators, incubators, refrigerators, and fume hoods. Recall min/max temperature and min/max humidity readings over any time period or ha it automatically reset itself every 24 hours. Stand or wall mount. Comes with 1 AAA battery which lasts a full year.

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Oregon Scientific THGR122NX Wireless Temperature and Humidity Sensor Review

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(More customer reviews)Product works as expected. From my experience Oregon Scientific Weather Stations are one of the best. The batteries last over a year and they are very accurate. After comparing different brands that people I know had I settled on a Oregon Scientific BAR388HGA and am very satisfied with it. I bought this sensor mainly to monitor the temperature in a second floor room. The sensor is approximately 60 feet away, up one floor and through several wall from the main unit, and it work very well.

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Compatible with over 50 Oregon Scientific products, this thermo-hygro sensor transmits temperature and humidity readings back to a main display unit, available separately. Most main units come with a single sensor; incorporating an additional sensor like this model makes it possible to monitor conditions in another point of interest. Readings can be taken indoors or out, so it is easy to tell at a glance the conditions in the backyard, the greenhouse, the wine cellar, the garage, or the crawlspace. Transmissions repeat every 40 seconds, so information is always current and accurate.
Centered around an easy-to-read LCD digital screen, the sensor displays the current humidity level as well as the temperature. It also indicates which of the three channels the transmission is currently set to. The unit\'s instruments are accurate within the range of -22 to 140 degrees F, and they travel up to 100 feet, barring obstruction, so finding a mounting location is easy.
To ensure accurate readings, the sensor should be mounted with the included hardware in a dry location and out of direct sunlight. Two AAA batteries, not included, are required for operation, and lithium batteries are recommended for use in sub-freezing weather conditions. Compactly built, the sensor measures a trim 2-2/5 by 3/4 by 3-2/5 inches, and Oregon Scientific backs it with a limited one-year warranty.

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Oregon Scientific THT312 Indoor/Outdoor Thermometer Clock with Wired Probe Review

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(More customer reviews)I can't begin to tell you the abuse I've subjected this product to.
1- Used it on my RV. Probe was outside from freezing to desert for 6000 miles.
2- Took it up to Alaska and back, 15,000 miles.
3- Used it to determine the temp. of my developing solution (very caustic chemicals).
4- Now it's being pecked by chickens in my brooder.
I seem to never replace batteries in this. I can only remember doing it twice in 6 years.
Buy this product. Have no worries. It truly is a 5-star product.

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Keep track of the time, as well as the temperature, with this straightforward thermometer clock. From Oregon Scientific, the thermometer clock allows users to plan outdoor activities appropriately while monitoring the indoor climate for maximum comfort. Additionally, the clock can serve as an alarm for early morning wake-ups and reminders.
The thermometer clock features preinstalled holes for wall mounting, as well as a plastic stand for tabletop placement. In large, easy to read digits, the thermometer clock relates the time and temperatures on its LCD screen, with a blue LED backlight for nighttime viewing. The user sets the time and alarm clock using the hour, minute, and alarm buttons on the backside of the thermometer clock. The user also can select between 12-hour or 24-hour time format and Fahrenheit or Celsius degree temperature display by flipping the provided switches. Three buttons on the front side of the thermometer clock engage the alarm\'s 8-minute snooze function, switches the mode, and enables the user to view and clear the high/low temperature recordings in the memory function. To evaluate outdoor conditions, an attached, weather-resistant 10-foot cable with a sensitive probe extends outside. The probe assesses outdoor temperatures ranging from -58 to 158 degrees F, and relates the data back to the base unit every 10 seconds. Indoor temperature measurement capabilities range from 32 to 122 degrees F. For the best results, keep the probe out of direct sunlight and heavy rain. The separate purchase of two AAA batteries is required. A limited one-year guarantee covers this item. The thermometer clock measures 2-1/2 inches wide by 3/4 inches deep by 4-1/2 inches high.

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Enviracaire E10 Digital Humidity/Temperature Indicator Review

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(More customer reviews)We own four of these little hygrometers. I've found them to be accurate -- all are within 1-2% relative humidity of one another when placed next to each other (in general, hygrometers that are within 5% of each other are considered pretty accurate for low-cost, consumer-grade hygrometers). I have them dispersed throughout the house, so I can verify the temperature and humidity in each room.
The price is pretty reasonable, too. I like the look of these units, and their simplicity. The only "option" you can select is whether the temperature is in F or in C.
The first one we bought two years ago, and the battery is still going strong. I haven't checked the type of battery, though, to see what will be needed when replacing.
With this little tool, it's been easy maintaining the humidity in our house between 40-45% year round with the aid of three humidifiers.

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enviracaire Digital Humidity/Temperature Indicator displays relative humidity and temperature

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Aprilaire RP-58 Humidistat Control #58 Review

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(More customer reviews)This is the new and improved Aprilaire #58 humidstat control. This replaces the RP #56 control they previously used in the model 700, 760 etc. The 56 worked fine for me for a few years before it got fried. It was automatic and could be used with the outdoor temperature sensor. The new one is much improved. It has a cleaner, neater design that incorporates an lcd display, three indicator lights which signify humidifier operation, water panel replacment and one to signal for dealer service in the event of failure. Upon inspection it seems to have a redesigned circuit board with surface mounted relays (quieter than the older model I may add)and adds the ability to interface with Aprilaire thermostats namely the 8570 which allows the thermostat to communicate with it and relay indoor humidity and outside temperature as well as control it without having to go directly to it. This is nice because in most application installs the humidstat is located near the humidifier on the return plenum.
Sometime in 2006, Aprilaire redesigned the humidifers and removed the 24volt control inside the humidifier(#4238)and changed the color from almond to grey and slightly changed the case styling. This helps in determining whether a customer/user has an older or newer unit. There is an A/B switch inside the humidstat that must be set to B if one owns an older humidifier and damage could result if that switch is in the wrong position, so before powering on everything make sure of that.
This humidstat also differs from old models in that it requires 24volt power (2va to 10va) depending on the model of humidifier you own. You can use your furnace terminal accessory board or heat pump air handler board but instead I opted for a plug in 24v 40va transformer. By interlocking the humidifier with a relay in a box and an existing air flow switch on the return and using a plug in transformer I was able to totally bypass messing around inside the the air handler. The previous installation job consisted of using an aprilaire #50 current sensing relay and this is what failed. I would definately recommend using a plug in transformer, a relay in a box (aprilaire rebadges one #4851)and if necessary an air flow switch. The advantage is that the relay will allow the humidifier to run anytime there is a call for humidity not just during the heating cycle. The current sensing relay is only rated for 50 watts while the #4851/RIB is rated much higher. Using an external transformer makes the install easier and allows for anyone to replace it if it goes bad. Strip two thermostat wires and crimp around the terminals and tighten. Plug in and your done. There is a little screw terminal that controls the panel time replacement indicator and for the 700 it should be turned to C. Make sure you follow the directions related to your equipment. In my case Heat pump. Since I did not use the 24volt strip inside the handler I had to jumper the WG/CF to common. Be sure to download the RP-58 Addendum as this has additional information to help with your install. This humidstat has changed and the same configuration cannot be copied and used on this one as the terminal designators have changed as well. I would recommend hooking up the outdoor temperature sensor if feasible as this would make it truly automatic and one would probably never have to make any adjustments at all.
Once in operation it is quieter, has a nice lcd blue backlit display which displays the relative humidiity and the level of humidity as you turn the dial (1-7) and an illuminated led that shows humidifier operation.
If you own an older model (remember almond color) aprilaire humidifier 700, 760 and even 400 - 600 series (check compatibility before buying) and you are in need of a new humidistat or want one with automatic control then this is the one you should buy. It might be slighty more expensive than a RP-56 but it is worth it and comes with a 5 year warranty as all of Aprilaire products now do. These guys are great btw, they know indoor air comfort and can easily be reached by telephone and email, unlike Honeywell.
Be Well My Friend!

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The new Aprilaire #58 automatic humidifier control works in conjunction with your furnace to control the operation of the humidifier. The control senses indoor RH and outdoor temperature and automatically adjusts the operation time of the humidifier to provide the optimum humidity level in the home. The digital readout on the control displays the RH level inside the cold air return. Can also be used in manual mode when it is not possible to run wire to outdoor sensor. This controller mounts on return ductwork.New lighted display includes indoor relative humidity readout, service indicator light, water panel change light, and indicator light. In order for the humidifier to operate, the furnace blower must be running and the humidifier control must be calling for humidity. NOTE:control must be continuously powered for proper functionality - separate 24 volt transformer may be required.Includes:ControlOutdoor SensorManual Mode ResistorManual Mode StickerInstallation InstructionsOwners ManualFor use with models: 110, 112, 220, 224, 400, 440, 445, 445A, 448, 500, 550, 558, 560, 560A, 568, 600, 700, 760, 760A and 768Unit dimensions - 5 15/16" W x 4 1/4" H Requires round 3/4" hole for duct mounting.

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Honeywell TM005X Wireless Indoor/Outdoor Thermo-Hygrometer Review

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(More customer reviews)I was most interested in the humidity measurement. I conducted a calibration****(See update at end of review) with a sling psychrometer. A sling psychrometer measures wet bulb/dry bulb temperature and is the least expensive (albeit a bit tedious to use) and most accurate way to determine relative humidity (RH).
I needed to know relative humidity for curiosity indoors and for a chamber in my basement used to dry cure sausage (I needed a 70%RH environment). The Honeywell unit was spot on with the sling psychrometer (and temp. was accurate as well).
The unit is new; I need to check it over time for accuracy. However, it's running very well so far and the price is right. I'll be buying more remote sensors [...] I found the remote sensor part no. is TS33C, can find them on Amazon with that search).
The majority of complaints say the humidity is "off." However, I didn't see a single valid calibration conducted.
Update 01-March-2009
I just took the main unit, the sensor and sling psychrometer. The conditions in my home at time of testing were 68F and 30% relative humidity.
Main unit read 68.4F/30% RH
The Sensor: 68.0F/30% RH
Sling Psychrometer: 68F/31% RH
The sling psychrometer consists of two sealed thermometers and will never need a calibration, it is an accurate standard. This Honeywell Unit is pretty darn good.
Update 13-Dec-2009
Someone contacted me and corrected a big point. I did not calibrate the unit by adjusting it to a known standard, I simply compared the values. My apologies for this rather serious error.

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The Honeywell TM005X Wireless Thermo-Hygrometer is an easy-to-read, economical, accurate and most convenient way to track temperature and humidity in and around your home or office.

The Honeywell TM005X is a Wireless Thermo-Hydrometer. Quickest and most accurate way of keeping track of temperature and humidity.

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Chaney Indoor Thermometer and Humidity Gauge Review

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(More customer reviews)Bought 2 of these the other day. Opened them up, put in the battery, and they were ready to go. I bought two of them so I could install them in each of my childrens bedrooms so I could tell the range of the temp and humidity each of thier rooms. First I put these next to my house thermostat which has a current temp and humidity displayed. After 1 hour of being in the same room right next to the thermostat both of the Cheney units read exactly what the temp was, and the humidity on both units were the reading the exact same (7 units higher) then my house thermostat. I don't know if my house unit is accurate or not but at least the two Cheney units read the same for temp & humidity. If they read differently than each other than I would say they weren't accurate but since both read the exact same things I give them two thumbs up and agree this is a great buy, especially since it displays the current temp and humidity and displays the daily low/high for each. Great Product!!!! Small, lightweight, has magnet on back to stick to fridge or can use clip to attach it to belt, or anything it can clip to. It also can be placed on a desk, shelf, etc but standing it on end with the attached stilt.

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Check comfort conditions in the house at a glance with this combination thermometer and humidity gauge from Chaney. Designed for indoor use, the unit features a large, easy-to-read display with numerical readouts as well as a simple house-shaped icon that reflects humidity comfort levels. The display also tracks daily highs and lows for both temp and humidity. A compact and portable little device, the gauge comes with a magnet backing for sticking on the fridge or a metal shelf as well as a foldout stand for the desktop. It requires one AA battery, which is not included, and measures 2-1/2 by 3 inches.

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