Site Information

 Loading... Please wait...
You are using an outdated browser. Please upgrade your browser at to improve your experience.
Product Info

Extech RH520A Humidity and Temperature Chart Recorder

EXT093 |

| Click Here to Learn How to Use This Desk Builder

Choose Your Video

  • Extech RH520A Humidity+Temperature Chart Recorder Showcase Video00:49
  • Extech RH520A Product Information Video00:59

Selected But Not Shown

      The Extech RH520A Humidity and Temperature Chart Recorder is suitable for applications where you need to monitor and record laboratory or clean room temperature and humidity history, keep track of process conditions and create warnings when conditions are outside of required limits.

      This system configures easily to your needs, mounting to a desk or wall, allowing for viewing of temperature and humidity trends with a date and time stamp.


      • Simultaneous numerical and graphical display of humidity and temperature readings, plus time, and date
      • LabView-based software that calculates and graphs dew point, wet bulb and GPP (grains per pound)
      • Large dual graphical LCD displays with adjustable vertical and horizontal TAC resolution
      • Internal memory records up to 49,000 data points and can be transferred to a PC via RS-232 serial port for further data analysis; an LCD indicates percentage of memory remaining
      • Detachable probe extends up to 1 meter for measurements in closed environments, and the replaceable probe does not require recalibration
      • Audible and visual alarm with hi/low setpoints
      • Output socket used with optional external alarm module


      Relative Humidity Range 10.0 to 95.0%
      Temperature Range -20.0 to 140.0°F (-28.0 to 60.0°C)
      Accuracy ±3% Relative Humidity; ±1.8°F/±1°C
      Dimensions 5" H x 7.7" W x 0.9" L


      The Extech RH520A Humidity and Temperature Chart Recorder comes standard with a 110V power supply. Or upgrade to the 220V or 240V model.


      NIST Calibration

      The Extech RH520A Humidity and Temperature Chart Recorder is available with standard factory calibration or with NIST Calibration Certification (adds 5 days to product lead time). NIST certification offers a traceable certificate that satisfies ISO & other regulatory requirements for product accuracy traceability to nationally recognized reference standards.

      Product Reviews

      Write Review

      This product hasn't received any reviews yet. Be the first to review this product!

      Warranty Information

      Please see our warranty page for more information regarding the warranty on this item.

      Return Information

      • Return windows close 30 days after you receive your item.
      • You are responsible for obtaining a Return Merchandise Authorization, the cost of shipping, and potential restocking fees, if the item has been opened.
      • To start a return, or to view the full returns policy, click here.
      Your Cost $299.99 List Price:
      Ships Free (US48)
      Ships in 3-4 business days

      Click the button below to add the Extech RH520A Humidity and Temperature Chart Recorder to your wish list.

      Please Note: Adding items to your wishlist will not save your custom configuration. If you would like to save your current configuation, you can email it to yourself, or copy the link below.

      Are you sure you're finished customizing this product?

      No, Continue Building
      Yes, Add To Cart Now

      Bulk Deals

      In many cases, we can offer bulk quantity discounts for purchases or smaller orders made over an extended period of time. Bulk deals are based on anticipated volume and the products you've selected. We can also provide you with brochures and swatches to assist in your purchasing decisions.

      If you would like to request a quote, we can be reached via phone (800-531-3746), email (, or live chat from 8am - 7pm Monday - Friday and from 10am - 6pm Saturday.

      Swatch Request Form

      Thank You!

      Please allow 1-3 weeks for delivery.

      Please Select Swatches