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Availability:
In Stock.
Arrives
Wednesday, Oct 14
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Features
- Professional Digital Psychrometer: 2 in 1 Humidity & Temperature Meter that accurately measures environment temperature, relative humidity, dew point and wet bulb temperature
- Wide Measurement Range: Humidity measurement from 0 to 100% RH and Temperature measurement from -22F to 212F (-30C to 100C)
- Fast Response Time: Only 10 seconds response time to display accurate temperature and humidity values quickly, with backlight feature for clear readings even in darkness
- Widely Application: This handheld digital psychrometer can be used in home, apartment, industrial settings, laboratory, greenhouse, warehouse and aquaculture environments
- Power Supply Included: 9V battery included in the package for immediate use upon arrival
- Advanced Features: Equipped with data hold function, max/min hold capability, auto power off option, and microprocessor-based design for reliable performance
- High Accuracy Measurements: Humidity accuracy of +/-2% RH at 20-80% RH range, and temperature accuracy of +/-0.5C at 25C with 0.01 resolution for precise readings
Description
Thanks for coming, you deserve the best! This is Mengshen's Portable 2 in 1 Humidity and Temperature Meter M350.It can accurately measure any environments temperature, relative humidity (RH), dew point, wet bulb temperature. Range:Humidity: 0 to 100% RHTemperature: -30°c to 100°c(-22°F to 199°F)Dewpoint Temperature: -30°c to 100°c(-22°F to 199°F)Wet Bulb Temperature: 0°C - 80°C (32°F - 176°F) Accuracy:Humidity: ±2% RHTemperature: ±0.9°F/±0.5°C (at 77°F/25°C)Resolution: 0.01%RH, 0.01°F/0.01°C Package Includes:1 x Digital Humidity and Temperature Meter1 x 9V Battery1 x use manual
Color: White
Brand: Mengshen
Product Dimensions: 2.2"W x 1.3"H
Battery Description: Alkaline
Mounting Type: Tabletop
Battery Description: Alkaline
Mounting Type: Tabletop
Operating Humidity: 0-100% RH
Upper Temperature Range: 100 °C
Voltage: 9 volts
Temperature Accuracy: 0.9 degrees_fahrenheit
Temperature Reading Accuracy: plus_minus_0_point_5_degrees_celsius
Item Dimensions W x H: 2.2"W x 1.3"H
Color: White
Brand Name: Mengshen
Number of Items: 1
Manufacturer: Mengshen
UPC: 768390764314
Item Highlight: Backlight, Dew Point, Wet Bulb Temperature, Battery Included
Unit Count: 10.58 Ounce
Number of Packs: 1
Included Components: Battery, User Guide
Item Length: 3 inches
Model: CECOMINOD048683
Part Number: MS-M350
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Oct 14
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Under the right circumstances, ventilation can get a house drier than air conditioning, besides being faster and far more energy-efficient. On a warm afternoon, ventilation can dry a house that’s too cool to run the air conditioner. Comparing indoor and outdoor dewpoints will tell you when ventilation will help. That’s why I bought a dewpoint meter in 2014. Nighttime ventilation in summer can be disastrous because as the house cools, the relative humidity will rise. Wood, paper, and some textiles will absorb moisture, and your air conditioner will have to work harder the next afternoon. By displaying RH, a dewpoint meter will tell you when to close the windows. After 3-1/2 years, my old dew-point meter wouldn’t turn on, so I bought a Mengshen. It’s much better. It feels like quality. Off, it draws only 9 microamps; so a battery should last years. On, it draws 2.2 milliamps. By default, it shuts off after 15 minutes. If I never remembered to turn it off, a battery would be good for about 1,000 operations. Trying to spot the old one on a cluttered desk was a nuisance. The new one is bigger and white with a red button. I can’t miss it. Better yet, it has a keyhole slot in back, big enough for an 15-gage nail or a #2 screw. I keep it on the wall by my digital thermometer. That improves accuracy because I can press the button to get a reading without handling it or breathing on it. Accurate If I give it time, the thermometer agrees well with other thermometers, inside and out. Wet salt in a closed container produces a relative humidity within 1% of 75%. I have a microwave bowl with a vent in the lid slightly larger than the meter shaft. With a little tape around the shaft, it fits snugly. I make sure the bowl is completely dry and cover the bottom with salt. I use a syringe to wet the salt, being careful not to splash the sides or have salty water visible besides the wet salt. Like my last meter, this one reaches equilibrium within 1% of 75%, meaning the temperature and dew point are very accurate under those circumstances. Wunderground has a page showing dew point readings at several locations within 10 miles of me. On days when their readings agree with each other, my Mengshen agrees. Sensitive If I hold the meter at arm’s length above my desk, the temperature, dew point, and relative humidity will go up and down. That’s because a little of the air I exhale mixes with the currents that hit the sensor. The old one read dewpoints in increments of about 0.6 F. This one shows changes in increments of .01 F. I prefer it. Annoyances Slow thermometer The massive chrome-plated brass shaft was the feature I hated most about the old one. Its thermal mass acted as a heat sink, slowing the response to temperature changes. The Mengshen has a similar shaft that’s even more massive. When I got it, I thought it was defective because it stayed 2 F low compared to my indoor thermometer. Half an hour later, it matched my indoor thermometer. It’s accurate but slow. I left it on the porch until it had cooled 10 F. I brought it in, and it took 45 minutes to warm within a degree of my indoor thermometer. (The emissivity of good electrical tape is much higher than that of polished chrome. A layer of electrical tape on the chrome will speed up the thermometer, but it’s still very slow.) If it’s hanging on the wall, it will give a good RH reading in 10 seconds, but if I take it to an environment at another temperature, I’d better come back in 45 minutes. I do that in unused rooms because a high RH will tell me I’d better give a room AC in summer or heat in winter. If I want to know RH in a hurry, I can use the meter for dewpoint and an infrared thermometer for temperature, then have an online calculator tell me the RH. It was probably designed with a heat sink so that currents of warmer and cooler air wouldn’t cause erratic readings hanging on a wall. C and F Both instruments let the user cycle through temperature, wet bulb, and dew point. Both mix C and F readings, meaning I must cycle through six readings instead of three. That’s a nuisance. However, if I just want to know RH and dewpoint, I don’t have to switch at all. Wet bulb A wet-bulb reading could be used to check the instrument against a wet-bulb thermometer. It’s calculated from temperature and dew point. It seems the processor was programmed wrong, because the three do not agree. Wet-bulb readings seem to be about 2 F low. The wet-bulb reading in the old one was also off. Switching When I switch to cycle to the reading I want, sometimes there’s a delay of up to a second, and sometimes I have to hit the button again. Switching off has the same problem. I don’t think the switches are defective. I think during some parts of the update cycle (once a second), the processor isn’t ready. Battery compartment. The battery compartment has no room to spare. It’s tricky to squeeze the connector wires out of the way so the lid will close. I’d say the Mengshen has design flaws, but I still love it.
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Reviewed in the United States on December 14, 2017 by Stephen Throop
Accuracy was best in class 5 stars, LCD has light , very nice ! Unit defaults in Celsius however not a deal breaker.....Nice Meter for thy Price.
Reviewed in the United States on March 1, 2024 by Mike Kemper
Amazingly accurate humidity gauge for about 1/3 the price. I owed this now for a little over 2 months, and I am very pleased with it. I did the salt test (depending on a lot of different factors, it is best to wait 24 to 36 hours to be 100% save. The last thing you want to do is remove your gauge too soon while the humidity is still "at a super-snails pace" increasing) and this gauge showed a 74.50% final reading. In order to get a faster and more accurate temperature reading, I wrapped the metal post with some "self adhering bandage wrap". That is because metal is super temperature sensitive, and takes much longer to readjust or change (say as compared to a plastic post) when being quickly moved into a new setting. I highly recommend this gauge, and I seriously doubt that you will find a better one (I did research for several weeks before choosing) for this low price. I'll finished by saying that I paid the full price, and received nothing in return for writing this review.
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Reviewed in the United States on March 20, 2018 by Kevin5
I needed this because I travel for work and need to be able to read humidity at sites in side for various reasons. To me it doesn't take that long to calibrate and for what I need it appears to be close enough to tell us an area higher in humidity than another. I am not sure about the % being completely accurate - but it does what I need it to.
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Reviewed in the United States on December 2, 2021 by Susan H
If you need a product like this, this is a good one. It works as it is supposed to, and has the feel of a quality instrument. When checked against my mechanical humidity and temperature meters (with known high accuracy), this meter was spot-on with its temperature readings, and within 1% with the humidity readings (very acceptable performance). Only caveat is that you need to wait at least one minute until the humidity reading stabilizes before getting the most accurate reading. Cannot comment on the wet/dry bulb accuracy.
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Reviewed in the United States on January 10, 2019 by Lynn
4.5 stars because pic shows storage pouch, but its not included. Only meter and battery in package. Not the end of the world, but would of been nice to have a way to keep meter from dust. Other than that…it’s all good.
Reviewed in the United States on May 7, 2023 by Ziggy
I've tested this device right out the on against 5 different temp & humidity combo sensors. This is within 1% accuracy. This is great for troubleshooting and validation. Easy to read display. Great backlight feature. Its also feels sturdy and shock proof at the readout handle. I wish the case had foam insulation for the sensor rod. This would add further protection when laying in a bag of tools. But I took care of that on my own.
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Reviewed in the United States on March 31, 2020 by RD Jeter
The product description alleges a 10 second "response time," but that is patently false. It takes at least 15 seconds for the temperature to change by 1 degree, and if you are using this for HVAC troubleshooting, you will be waiting a few minutes for it to stabilize. Pretty much useless unless you are checking for very minor temperature variations.
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Reviewed in the United States on June 14, 2022 by TX371