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🌟 Stay ahead of the climate curve with Extech RH300 – precision you can trust, wherever you go!
The Extech RH300 Digital Psychrometer is a compact, field-ready meter that simultaneously measures relative humidity (10-90% RH), air temperature (-4 to 122°F), dew point, and wet bulb temperatures. Featuring a unique twist-to-close sensor cap for protection, it supports advanced calculations like T1-T2 differentials with an optional probe. Designed for professionals needing reliable, accurate environmental data, it includes smart features like data hold, auto power off, and max/min/average readings, all powered by 2 AAA batteries.



























| ASIN | B000BF5400 |
| Battery Description | 2 x AAA (1.5V) |
| Best Sellers Rank | #439,428 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #48 in Humidifier Humidity Meters |
| Brand Name | Extech |
| Color | Orange |
| Customer Reviews | 4.4 4.4 out of 5 stars (61) |
| Global Trade Identification Number | 00793950443002 |
| Included Components | Digital Psychrometer |
| Item Highlight | RH 10-90%, air temp -4 to 122F, dew point, wet bulb, T1-T2 differential (with TP890), twist sensor cap |
| Item Weight | 0.02 kg |
| Manufacturer | Extech |
| Model | RH300 |
| Mounting Type | Tabletop |
| Number of Items | 1 |
| Number of Packs | 1 |
| Operating Humidity | 10% to 90% |
| Part Number | EXTRH300 |
| Temperature Accuracy | 1 |
| UPC | 793950443002 796841974500 |
| Unit Count | 1 Count |
| Upper Temperature Range | 120 °F |
| Voltage | 1.5 volts_of_direct_current |
| Warranty Description | 1 Year |
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