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Extech Instruments RH300 Digital Psychrometer

The RH300 digital psychrometer offers precise measurements for humidity and temperature, including external probe compatibility for differential readings. It features simultaneous display of %RH, air temperature, dew point, wet bulb, and probe temperature, with switchable °F/°C units and high-resolution 0.1° readings. Designed with a twistable sensor cap for protection, it includes max/min recording, data hold, and auto power-off for battery efficiency. Its portable, lightweight design makes it ideal for detailed environmental assessments in industrial, HVAC, and laboratory settings. Optional calibration and external probes enhance accuracy and functionality.

Authorized Distributors
Source:Newark
Part No:RH300
Stock:3
Inv Date:06-20-2026
Price: Unit price: $152.35
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Source:DigiKey
Part No:RH300
Stock:3
Inv Date:06-20-2026
Price: Unit price: $114
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Part No:RH300
Stock:26
Inv Date:06-21-2026
Price: Unit price: $120.21
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Part No:RH300
Stock:0
Inv Date:06-20-2026
Price: Unit price: $114
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Part No:RH300
Stock:0
Inv Date:06-20-2026
Price: Unit price: $113.62
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Source:TRANSCAT
Part No:RH300
Stock:3
Inv Date:06-15-2026
Price: N/A
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Part No:RH300
Stock:0
Inv Date:06-20-2026
Price: Unit price: $113.62
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Part No:RH300
Stock:0
Inv Date:06-20-2026
Price: Unit price: $96.88
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Part No:RH300
Stock:0
Inv Date:06-20-2026
Price: Unit price: $114
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Authorized Distributors
Part No:RH300
Stock:0
Inv Date:06-17-2026
Price: N/A
Buy/RFQ:
Part No:RH300
Stock:2
Inv Date:06-20-2026
Price: Unit price: $139
Buy/RFQ:
Part No:RH300
Stock:0
Inv Date:06-20-2026
Price: N/A
Buy/RFQ:

Extech Instruments RH300 Digital Psychrometer Specifications:

  • Measurement Range: 10 to 90% RH with 0.1%RH resolution
  • Temperature Range: -4 to 122°F (-20 to 50°C) with 0.1° resolution
  • External Temperature Range: -90.4 to 122°F (-68.0 to 49.9°C)
  • Accuracy: ±3% RH, temperature accuracy depends on calibration
  • Dimensions: 1 x 1.8 x 3 inches (25.4 x 45.7 x 76.2 mm)
  • Weight: 3.3 oz (93.8 g)
  • Features: Data hold, max/min records, auto power off, sensor cap twist for protection
  • Power: 2 AAA batteries included
  • Optional accessories: External probe TP890, calibration bottles RH300-CAL, kit RH305
  • Calibration Traceability: NIST traceable options available

Buy the Seagate RH300 – Reliable Psychrometer for Industrial Applications

Order the Seagate RH300 digital psychrometer online to achieve accurate humidity and temperature readings. Ideal for industrial, HVAC, and laboratory environments, this device offers simultaneous display of %RH, air temperature, dew point, and wet bulb, with external probe support for differential measurements. Compact and lightweight, it features max/min readings, data hold, and auto power-off. Optional calibration and external probes enhance performance. Purchase today for reliable, professional environmental monitoring that ensures optimal conditions in any industrial or scientific setting.

Get Seagate RH300 today—designed for precision humidity and temperature measurements in demanding environments.

Frequently Asked Questions

Where can I buy Extech Instruments RH300?

You can click on the BUY or RFQ button to purchase RH300 from an authorized Extech Instruments distributor.

How do I troubleshoot issues or seek technical support for part RH300?

You can download the RH300 datasheet or visit the Extech Instruments website for support.

Who is the manufacturer of RH300?

Extech Instruments

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