Can the relative humidity be calibrated by the user?

Neither relative humidity nor temperature can be calibrated by the user. User's manual does not mention this possibility.

Can this item be sent in for re-calibration periodically, and updated certificate?

All the items have been calibrated before sending out, and if you need to calibate again, then you can send it to us for re-calibration, but it will cost a lot of time and shipping fee

?Viene con el certificado de calibración?

Thank you for your question. If you need it you can contact our customer service and we will send you a calibration operation manual, which is recommended to be used under professional personnel and operating equipment.

Has anyone who bought this unit tested it for accuracy?

That I do not know. what I can say is that the temperature it shows is close to what the weather people say the temp.s are. I bought it because the local weather people have decided to no longer give the dew points in the forecast. I do know that the higher the dew point reading the device shows the more humid it feels. I also had issue with deciding to just give a date on the map as to when the "Monsoon season" starts and stops. The method of a dew point higher than 55degrees 3 days in a row for the start and below 55 degrees 3 days in a row for the end makes more sense.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Protmex PT6508 Temperature Humidity Meter - Wet Bulb for Indoor/Outdoor | Digital Thermometer Hygrometer Monitor with Ambient, Dew Point, MIN, MAX, Data Hold, LCD Backlight

Product ID: 23678036

Details

Battery Description
Alkaline
Brand
Protmex
Color
Orange
Item Weight
190 g
Product Dimensions
2.36"W x 2.9"H

💧Humidity 0%-100% RH Precision

📊Multi-Function Data Hold & Min/Max

🌡️Wide Temp Range -20°C to 60°C

¥18187

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌟 Stay ahead of the climate curve with Protmex PT6508 — your all-weather data sidekick!

ULTIMATE USABILITY - Backlit LCD and data hold ensure clear visibility and easy data tracking anytime.
VERSATILE APPLICATION - Perfect for HVAC pros, wine cellar caretakers, meteorologists, and more.
SMART POWER MANAGEMENT - Auto shutdown after 30 minutes saves battery life for uninterrupted performance.
PRECISION YOU CAN TRUST - Accurate readings within ±0.5°C and ±1°F for professional-grade monitoring.
ALL IN ONE CLIMATE MASTER - Combines temperature, humidity, wet bulb & dew point in one sleek device.

The Protmex PT6508 is a digital psychrometer combining temperature, humidity, wet bulb, and dew point measurements with high accuracy and a wide operating range (-20°C to 60°C, 0%-100% RH). Featuring a backlit LCD, data hold, min/max tracking, and auto shutdown, it’s designed for professionals in HVAC, agriculture, meteorology, and specialized environments. Compact and battery-powered, it delivers reliable indoor/outdoor climate monitoring with ease.

Specifications

ASIN	B017NF1POE
Battery Description	Alkaline
Best Sellers Rank	#12,485 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #6 in Humidifier Humidity Meters #10 in Humidifier Accessories
Brand Name	Protmex
Color	Orange
Customer Reviews	4.6 4.6 out of 5 stars (900)
Global Trade Identification Number	06051651879433
Included Components	4 x AAA Batteries, 1 x Packing Bag, 1 x Use Manual
Item Dimensions W x H	2.36"W x 2.9"H
Item Length	7.2 inches
Item Weight	190 g
Manufacturer	PROTMEX
Model	CECOMINOD046940
Mounting Type	Tabletop
Operating Humidity	0%-100%
Part Number	PPM-TI002-3
Temperature Accuracy	0.5 degrees_celsius
Temperature Reading Accuracy	plus_minus_1_degree_fahrenheit
Unit Count	1 Count
Upper Temperature Range	140 °F
Voltage	1.5 volts

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