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EXTECH RH350 Hygrometer

The Extech RH350 is a portable digital hygrometer designed for accurate environmental measurements. It measures humidity from 10 to 90%RH with 0.1% resolution and internal temperature from -4 to 122°F (-20 to 50°C) with 0.1°F accuracy. External temperature probes measure from -328 to 2498°F (-200 to 1370°C). It features superheat differential measurements such as T1-T2, Air-T1, and Dew Point, with dual Type K probe inputs. The device displays humidity, temperature, dew point, wet bulb, or external probe temperatures simultaneously, includes a built-in RS-232 interface for PC data transfer, and stores up to 99 data records for detailed analysis.

Authorized Distributors
Source:DigiKey
Part No:RH350
Stock:0
Inv Date:06-05-2026
Price: Unit price: $184
Buy/RFQ:
Part No:RH350
Stock:0
Inv Date:06-06-2026
Price: Unit price: $184
Buy/RFQ:
Part No:RH350
Stock:0
Inv Date:06-05-2026
Price: Unit price: $184
Buy/RFQ:
Part No:RH350
Stock:0
Inv Date:06-05-2026
Price: Unit price: $184
Buy/RFQ:
Part No:RH350
Stock:0
Inv Date:06-05-2026
Price: Unit price: $184
Buy/RFQ:
Part No:RH350
Stock:0
Inv Date:06-05-2026
Price: Unit price: $156.37
Buy/RFQ:
Part No:RH350
Stock:0
Inv Date:06-05-2026
Price: Unit price: $184
Buy/RFQ:
Part No:RH350
Stock:1
Inv Date:06-05-2026
Price: N/A
Buy/RFQ:
Part No:RH350
Stock:0
Inv Date:06-05-2026
Price: Unit price: $209
Buy/RFQ:
Authorized Distributors
Part No:RH350
Stock:0
Inv Date:06-05-2026
Price: N/A
Buy/RFQ:

EXTECH RH350 Hygrometer Specifications:

  • Humidity Range: 10 to 90%RH, Resolution: 0.1% RH, Accuracy: 23% RH
  • Internal Temperature Range: -4 to 122°F (-20 to 50°C), Resolution: 0.1°F, Accuracy: ±1.8°F
  • External Temperature Range: -328 to 2498°F (-200 to 1370°C), Resolution: 0.1°, Accuracy: ±0.3% of reading
  • Dew Point Range: -90.4 to 122°F (68.0 to 49.9°C)
  • Wet Bulb Range: 6.9 to 122°F (-21.6 to 49.9°C)
  • Dimensions: 9 x 2.2 x 1.7 inches (230 x 57 x 44 mm)
  • Weight: 5.3 oz (153 g)
  • Power: 4 AAA batteries
  • Connectivity: RS-232 interface (requires optional cable)
  • Includes: Two Type K bead wire temperature probes
  • Display: Triple backlit with hold and auto power off
  • Calibration: Traceable to NIST with calibration reference for 33% and 75% RH

Buy the Extech Series RH350 Hygrometer: Portable Environmental Measurement Device

Purchase the Extech RH350 hygrometer online now to enjoy reliable, quick, and accurate environmental measurements. Perfect for laboratories, HVAC, and maintenance tasks, this device features superheat differential measurements, dual Type K probe inputs, and extensive data logging capabilities. Its portable design, backlit display, and RS-232 data interface make it easy to use and integrate into your workflow. Order today and ensure your environmental conditions meet strict standards with confidence and precision.

Order your Extech Series RH350 hygrometer today and ensure precise environmental monitoring in laboratories, HVAC systems, or mold prevention projects.

Frequently Asked Questions

Where can I buy EXTECH RH350?

You can click on the BUY or RFQ button to purchase RH350 from an authorized EXTECH distributor.

How do I troubleshoot issues or seek technical support for part RH350?

You can download the RH350 datasheet or visit the EXTECH website for support.

Who is the manufacturer of RH350?

EXTECH

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