# RH390-NIST Extech Meter New

**Features**

-   NIST Traceable
-   Fast response time (<30 seconds)
-   Dual backlit display
-   Simultaneous display of: Humidity/Temperature, Humidity/Dew Point or Humidity/Wet Bulb
-   Data Hold and Min/Max functions

**Specifications**

-   Humidity: 0 to 100%RH
-   Temperature (Internal): -22 to 199°F (-30 to 100°C)
-   Basic Accuracy: ±2%RH, ±1.8°F/1°C
-   Max. Resolution: 0.1%RH, 0.1°F/°C
-   Dewpoint: -22 to 199°F (-30 to 100°C)
-   Wet Bulb: 32 to 176 °F (0 to 80°C)
-   Dimensions: 7.8x1.7x1.3" (200x45x33mm)
-   Weight: 7oz (200g)

Measure humidity and temperature simultaneously with the RH390 Precision Psychrometer from Extech. A dual-illuminated readout can be alternated to display wet bulb and humidity, or dew point and humidity, or temperature and humidity. This handheld device registers temperatures from -22 degrees to 199 degrees F (-30 degrees to 100 degrees C) and measures the full spectrum of relative humidity with ±2% accuracy between 20 and 90% RH. Complete with carrying case and 9V battery.

## Details

- **Price:** 346.5 USD
- **Vendor:** Extech
- **Type:** Met Oth
- **Tags:** Extech, Manufacturers, Meters & DAQ, Other, product_manual_group_2, Product_new

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 346.50 USD | In stock |

## Images

- RH390-NIST Extech Meter New

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> Source: [ValueTronics](https://valuetronics.com/products/rh390-nist-extech-meter-new)
> Updated: 2026-05-21