Software communication problems can occur due to a few reasons. Please click on the appropriate troubleshooting guide (link) below for assistance. WT Meter – Digital Psychrometer and Portable Thermometer Hygrometer with LCD Monitor,. Extech RH Precision Dual Display Hygro Thermometer Psychrometer. RH Dual Display Hygro-Thermometer Psychrometer. On Sale Extech RH ✅ Engineers on staff. ✅ FAST quotes ✅ We accept POs.

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The physical size is different.

Extech RH490 Precision Hygro-Thermometer

If you are not satisfied with your purchase from Fondriest Environmental, you have up to 14 calendar days from the time you receive your item s to initiate a return. If you need more assistance, please contact our Tech Support for further assistance.

It depends on what the meter is being used for. Once your order has prepared for shipment or has shipped, we are unable to change rh4900 shipping address. Failed Delivery Attempts Most of Fondriest carriers make three attempts to deliver a package.

Providing the finest test equipment solutions since 1992

If you do not understand these specs please contact our Tech Support for further assistance. Although rare, these occasions can include when Fondriest learns that the products no longer are being manufactured or they otherwise become unavailable, when Fondriest cannot source components for the configuration you ordered, or when there was a pricing error at the Fondriest Online Store.


Lifetime Technical Support A knowledgeable staff of application engineers provides ongoing support for the life of the product. If the lead time changes, Fondriest will contact you via email and provide a revised shipping estimate.

How do I change the battery? Extech meters should be calibrated annually. Extended Warranties Warranties extended beyond factory standards are offered on many items to ensure a lasting dxtech life. High volume purchases lead to favorable pricing, which is passed on to the customer by way of discount off MSRP.

How can I get a calibration procedure for my meter? A knowledgeable staff of application engineers provides ongoing support for the life of the product. Contact Fondriest for earlier overnight delivery options. In those circumstances, Fondriest will inform you and, if you rh940 interested, Fondriest may suggest alternative products that may meet your needs. Please request a Return Material Authorization RMA by contacting your account representative or extecn general customer support address: For an additional charge, Fondriest offers this expedited shipping option on most of products.

Does my moisture meter read moisture content or does it give me a relative reading? These meters are smaller in size than traditional clamp meters and will easily fit into tight spaces.

Can you cross reference another manufacturer’s product to an Extech product? If a product cannot be shipped immediately, customers are notified by phone or email. Fondriest can ship orders within the 50 United States only. The operation manual for your light meter will provide you with the basic information on how to make light measurements with your meter. What is the difference between A and C Weighting.


If you have any questions or would like to discuss your edtech in more detail, please contact us at or customercare fondriest.

RH Precision Hygro-Thermometer | Extech Instruments

Communications Call, email or chat online with application engineers. Please click on the appropriate troubleshooting guide link below for assistance. Assembly, Test and Calibration Sensors and instruments are assembled, tested and calibrated prior to shipment.

OSHA compliance testing absolutely calls for a meter to be checked for calibration before and after every use. The easiest way to do this without damaging the power cord is to use a line separator Extech model Measurements should normally be made as close as possible based on the Distance to spot ratio of the meter. Warranties extended beyond factory standards are offered on many items to ensure a lasting useful life. Do I need to purchase a microphone calibrator? Packages should be insured for the full value in case of loss or damage.

Extech RH Precision Hygro-Thermometer

Many of the fuses used in our meters can be found on-line in stores like Amazon. This ability is known as emissivity and extch based upon the material of the object and its surface finish. The ‘Delivers’ timeframe is an estimate of when the item will be delivered to your shipping address after it ships.

You will receive a confirmation email momentarily.