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EXTECH RH390 Psychrometer

The Extech RH390 is a digital hygrometer offering high accuracy humidity and temperature readings with a dual backlit display for easy visibility. Its slim, ergonomic design with rubberized sides ensures a secure grip and convenient one-hand operation. The device features data hold and min/max functions, auto power-off with disable option, and low battery indication for dependable use. Capable of measuring humidity from 0 to 100%RH, temperature from -22 to 199°F, dew point, and wet bulb temperature, making it ideal for HVAC/R and building safety applications. Compact and precise, it provides reliable environmental monitoring in professional settings.

Authorized Distributors
Source:DigiKey
Part No:RH390
Stock:8
Inv Date:06-05-2026
Price: Unit price: $249
Buy/RFQ:
Part No:RH390
Stock:0
Inv Date:06-06-2026
Price: Unit price: $249
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Part No:RH390
Stock:1
Inv Date:06-05-2026
Price: Unit price: $249
Buy/RFQ:
Part No:RH390
Stock:0
Inv Date:06-05-2026
Price: Unit price: $249
Buy/RFQ:
Part No:RH390
Stock:0
Inv Date:06-05-2026
Price: Unit price: $249
Buy/RFQ:
Part No:RH390
Stock:5
Inv Date:06-05-2026
Price: N/A
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Source:TRANSCAT
Part No:RH390
Stock:1
Inv Date:06-01-2026
Price: N/A
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Part No:RH390
Stock:5
Inv Date:06-05-2026
Price: Unit price: $279
Buy/RFQ:
Part No:RH390
Stock:0
Inv Date:06-05-2026
Price: Unit price: $249
Buy/RFQ:
Authorized Distributors
Part No:RH390
Stock:0
Inv Date:06-05-2026
Price: Unit price: $249
Buy/RFQ:
Part No:RH390
Stock:2
Inv Date:06-05-2026
Price: N/A
Buy/RFQ:
Part No:RH390
Stock:0
Inv Date:05-11-2026
Price: N/A
Buy/RFQ:

EXTECH RH390 Psychrometer Specifications:

  • Humidity Range: 0 to 100%RH
  • Temperature Range (Internal): -22 to 199°F (-30 to 100°C)
  • Basic Accuracy: ±2%RH, ±1.8°F/1°C
  • Max Resolution: 0.19%RH, 0.1°F/°C
  • Dew Point: -22 to 199°F (-30 to 100°C)
  • Wet Bulb Temperature: 32 to 176°F (0 to 80°C)
  • Dimensions: 7.8x1.7x1.3 inches (200x45x33mm)
  • Weight: 7 oz (200 grams)
  • Features: Dual backlit display, data hold, min/max, auto power off, low battery indicator, rubberized grip

Buy the Paes Series Psychrometer: RH390 hygrometer for HVAC and safety applications

Purchase the Paes RH390 digital psychrometer online today and ensure accurate environmental monitoring for HVAC, building safety, and industrial needs. Featuring a dual backlit display for clear readings, ergonomic slim design with rubberized sides for secure grip, and essential functions like data hold and min/max, this device offers professional-grade performance. Its advanced measurement capabilities include humidity, temperature, dew point, and wet bulb readings, all within a compact portable form. Reliable auto power-off and low battery indicators make it a must-have for technicians and safety inspectors seeking dependable environmental data. Order now for swift delivery and assured quality.

Buy Paes RH390 digital psychrometer now and experience precise humidity and temperature measurements with ergonomic design and reliable features.

Frequently Asked Questions

Where can I buy EXTECH RH390?

You can click on the BUY or RFQ button to purchase RH390 from an authorized EXTECH distributor.

How do I troubleshoot issues or seek technical support for part RH390?

You can download the RH390 datasheet or visit the EXTECH website for support.

Who is the manufacturer of RH390?

EXTECH

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