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$5.99 Flat Rate Shipping For Orders Under $39
Most orders under $39 ship for only $5.99 using a mix of economy shipping methods including UPS Ground, USPS First Class, and/or SurePost. Your order will be delivered in up to 7 business days after it ships out. Orders placed before 10:30 am PST Monday-Friday are shipped the same day. Our $5.99 flat rate shipping is only available within the contiguous United States. Frozen foods, live foods, and items shipped directly from the manufacturer do not qualify for $5.99 flat rate shipping.
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Pocket Sized TDS Meter w/ digital thermometer in aquarium-specific packaging.
The world’s smallest and lightest TDS meter also comes with a built-in digital thermometer. It is a true pocket size meter, comfortably fitting into a shirt pocket without adding bulk. The TDS-4TM-A comes in an aquarium-specific retail-ready packaging.
Features
Includes an internal digital thermometer (celsius).
The smallest and lightest TDS meter available on the market.
Hold Function - Saves measurements for convenient reading and recording.
Auto-off function - Turns off meter after 10 minutes of non-use to conserve batteries.
Dual Range - Measures from 0 - 999 ppm, with a resolution of 1ppm. From 1000 to 9990 ppm, the resolution is 10 ppm, indicated by a blinking 'x10' image.
Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver.
Recommended for aquariums & aquaculture
Manufacturer Info
HM Digital, Inc. Established in 1987, HM Digital, Inc. (formerly known as Heemang Electronics) is an original equipment manufacturer (OEM) that has been recognized worldwide for providing the best values in water testing instrumentation, especially the increasingly popular TDS meter.
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Q
Which end goes into the water for testing? Is it the end where the cap comes off I'm assumimg?
This is an excellent little tool, especially if you are making your own RO/DI water. It gives me the confidence of knowing that I'm only putting 0ppm TDS water in my tank, whether for top off or mixed with salt for water changes. The added temperature reading comes in handy for checking temperatur...Read More
This is an excellent little tool, especially if you are making your own RO/DI water. It gives me the confidence of knowing that I'm only putting 0ppm TDS water in my tank, whether for top off or mixed with salt for water changes. The added temperature reading comes in handy for checking temperature before water changes and for validating the accuracy of my other thermometers in my tank. Not sure if my unit is different from other reviewers, but mine cycles between Celsius and Fahrenheit when pressing the TEMP button on the device.Hide
Not much to review four stars out of five just because it Celsius not Fahrenheit be nice if you could switch back-and-forth will besides that works as well is it supposed to come calibrated one day delivery as usual as well good product.
The unit only reads temp. in Celsius not Fahrenheit. Not a big deal for me but can be for others. Apart from that, scary when you test your "filtered" drinking water vs. RO/DI Water.
Most orders under $39 ship for only $5.99 using a mix of economy shipping methods including UPS Ground, USPS First Class, and/or SurePost. Your order will be delivered in up to 7 business days after it ships out.
free shipping for orders $39+
We ship 99% of the products we carry for free within the contiguous United States using a mix of economy methods including USPS First Class Mail, SurePost and UPS Ground. Your order will arrive in up to 7 business days. Just spend $39 or more!
free faster shipping for orders $250+
Over 90% of shoppers receive their orders within 1-2 business days. Upgrade from free economy shipping to faster shipping for only $5.99—or spend $250 and we'll upgrade you automatically!
need your order even faster? no problem!
Expedited shipping services are available for most products if you are in a hurry. Get guaranteed delivery in 2 business days, 1 business day, or next day by 10:30 am. Costs vary by location.
buy it today and we'll ship it today
Same-day shipping is available Monday-Friday for most products—place your order by 10:30 am PST. Pre-ordered and back-ordered items do not qualify, nor do drop-shipped, live, or frozen shipments.
live plants, live foods, and frozen foods delivered to your door
We ship live plants, live foods, and frozen foods within the contiguous United States. Each of these categories is subject to its own $19.99 flat-rate shipping fee to cover the special packaging and/or expedited shipping costs required to ensure safe delivery. Orders with 12+ live plants ship free!
Return any new and unused item within 60 days for a full refund. Having difficulty with a product? Contact us to speak with an aquarium expert. If you need a replacement, fill out this form.
A small segment of the 180+ brands we carry require that customers contact them directly if/when problems arise. You can view the full list of those brands and get their contact info here.
We are unable to accept returns of Digital Aquatics, Neptune Systems, Vertex Aquaristik, Aqua Illumination (AI), EcoTech Marine, GHL, or Seneye products once the manufacturer's packaging seals have been broken.
Marine Depot is an authorized reseller for every product we carry. That means when you buy aquarium supplies from us, your products are not only backed by our own 60-day return policy, they also carry full factory warranties, where applicable. Some items have a 1-year warranty, others have limited lifetime warranties. Warranty coverage varies from manufacturer to manufacturer, so please read the product description of the item(s) you are considering thoroughly for details or contact us if you have warranty questions.
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46,020 Reviews. 5,153,553 Products Shipped. #1 Aquarium Supply Store Online.
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HB00045HM Digital Pocket-Sized TDS Meter w/ Thermometerhttps://www.marinedepot.com/hm-digital-pocket-sized-tds-meter-w-thermometer//www.f3images.com/IMD/1000/HB00045/HM-Digital-Pocket-Sized-TDS-Meter-w-Thermometer-99.jpgHM Digital, Inc.
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19.12USD4.515
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