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Testo 112, 1-channel temperature measuring instrument NTC/Pt100, calibratable, with battery.

The testo 175T2 temperature data logger features a large display and alarm indication that makes it ideal for continuous monitoring of temperatures. The temperature measurement logger has both an internal NTC thermistor, as well as capability for an external NTC probe connection, which allows for simultaneous measurements of ambient and product temperatures. Creation of Excel Spreadsheets, PDFs, and data analysis are all easily achieved with the free, downloadable ComSoft software.

The testo 176H1 humidity and temperature measurement logger has a large display that makes it ideal for the monitoring of temperature and humidty in enviro chamber and storage rooms. The 176H1 is a RH and temperature data logger with external NTC humidity and temperature sensor connections. Creation of Excel Spreadsheets, PDFs, and data analysis are all easily achieved with the free, downloadable ComSoft software.

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<p>With this kit, you&rsquo;ll be ready to start your measurements in the commissioning, servicing and maintenance of refrigeration and air conditioning systems and heat pumps straight away: You will get the testo 550s smart digital manifold with Bluetooth and 2-way valve block, two wired clamp temperature probes (NTC) and a rugged transport case. Additional Bluetooth probes, e.g. for wireless measurements of temperature and vacuum, are available separately.<br /><br /><strong>*A2L Refrigerant Compliant*</strong></p>

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<p>Start your wireless measurements on refrigeration and air conditioning systems and heat pumps straight away. The practical kit containing the testo 558s digital manifold with Bluetooth connection to the wireless temperature and vacuum probes, together with the 4-hose charging set included in the kit, offers the ideal basis for carrying out everyday measuring tasks. The testo 558s offers intuitive operation thanks to its touchscreen and clear measurement graphs on a large colour display. In addition to the touchscreen, the manifold can also be operated via keys when working with gloves. Thanks to its A3 and A2L compatibility, high robustness with IP54 and hybrid charging system comprising rechargeable and non-rechargeable batteries, the manifold is ideal for every situation.</p>

The testo 570s digital manifold with Bluetooth and 4-way valve block is the optimal solution for long-term measurements on refrigeration and air conditioning systems as well as heat pumps. Intelligent error analysis in the testo Smart App allows anomalies to be detected quickly and reliably. testo 570s boasts the world&#39;s longest runtime of up to 360 hours, a large data memory and a high degree of measuring accuracy, making it a reliable partner for both long-term and short-term measurements.<br />
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<strong>*A2L / A2 / A3 Compliant*</strong>

Start your wireless measurements on refrigeration and air conditioning systems and heat pumps straight away. The practical kit containing the testo 570s digital manifold with Bluetooth and 4-way valve block together with the wireless temperature and vacuum probes is ideal for long-term and standard measurements. The intelligent error analysis in the testo Smart App ensures reliable diagnostics following a long-term measurement, eliminating the need for lengthy searches. And with the world&#39;s longest battery life of 360 hours, testo 570s is ideal for long-term measurements, but also for all kinds of short-term applications over the course of a working week. In addition, with a measuring accuracy of 0.25% fs, the manifolds offer maximum precision even at low pressure values.<br />
<br />
<strong>*A2L / A2 / A3 Compliant*</strong>

Start your wireless measurements on refrigeration and air conditioning systems and heat pumps straight away. The practical kit containing the testo 570s digital manifold with Bluetooth and 4-way valve block together with the wireless temperature and vacuum probes plus filling hoses is ideal for long-term and standard measurements. The intelligent error analysis in the testo Smart App ensures reliable diagnostics following a long-term measurement, eliminating the need for lengthy searches. And with the world&#39;s longest battery life of 360 hours, testo 570s is ideal for long-term measurements, but also for all kinds of short-term applications over the course of a working week. In addition, with a measuring accuracy of 0.25% fs, the manifolds offer maximum precision even at low pressure values.<br />
<br />
<strong>*A2L / A2 / A3 Compliant*</strong>

<div style="background-color:#dae4ea; border: 1px solid #648798; padding: 10px;"><b>Are you interested in this measuring instrument?<br/>Testo has put together practical kits for you – so you’ll be optimally equipped to tackle your measuring tasks right away <a href="https://www.testo.com/en-US/products/manifold">>> To the products</a></b></div>

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<p>The kit for wireless measurements in the field of commissioning, servicing and maintenance of refrigeration and air conditioning systems and heat pumps: You will get the testo 550s smart digital manifold with Bluetooth and 2-way valve block, two testo 115i wireless clamp thermometers (Bluetooth, NTC) and a rugged transport case. Additional Bluetooth probes, e.g. for wireless, hose-free vacuum measurements with the testo 552i, are available separately.\<br />
<strong>*A2L Refrigerant Compliant*</strong><br />
&nbsp;</p>

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<a href="https://www.testo.com/en-US/promo">>> FIND OUT MORE</a></div>
<p>The kit for wireless measurements in the field of commissioning, servicing and maintenance of refrigeration and air conditioning systems and heat pumps: You will get the testo 550s smart digital manifold with Bluetooth and 2-way valve block, two testo 115i wireless clamp thermometers (Bluetooth, NTC), testo 552i wireless vacuum probe (Bluetooth), and a rugged transport case. Additional Bluetooth probes are available separately.<br /><br /><strong>*A2L Refrigerant Compliant*</strong></p>

<div style="background-color: #fff4e5;border: 2px solid #ff9900;border-top-left-radius: 16px;border-top-right-radius: 16px;padding: 1rem;margin: 0 -1rem 1.5rem;">FREE VETO MB3 Bag with purchase, now through July 31st, 2026.<br />
<a href="https://www.testo.com/en-US/promo">>> FIND OUT MORE</a></div>
<p>The kit for wireless measurements in the field of commissioning, servicing and maintenance of refrigeration and air conditioning systems and heat pumps: You will get the testo 550s smart digital manifold with Bluetooth and 2-way valve block, two testo 115i wireless clamp thermometers (Bluetooth, NTC), testo 552i wireless vacuum probe (Bluetooth),&nbsp; a set of 3 refrigerant hoses and a rugged transport case. Additional Bluetooth probes are available separately.<br /><br /><strong>*A2L Refrigerant Compliant*</strong></p>

The testo 557s digital manifold with Bluetooth and a 4-way valve block features a large graphic display, a compact, robust housing, guided measurement menus and the testo Smart App. Top-quality measurement technology, a high degree of reliability and smart functions for quick, easy measurements and documentation make the testo 557s manifold a reliable partner for your commissioning, servicing and maintenance of refrigeration and air conditioning systems and heat pumps.

Start your wireless measurements on refrigeration and air conditioning systems and heat pumps straight away. Thanks to the Bluetooth vacuum probe supplied, you can even measure vacuum without any cables or hoses. You will get the testo 557s smart digital manifold with Bluetooth and 4-way valve block, one testo 552i wireless vacuum probe (Bluetooth), two testo 115i wireless clamp thermometers (Bluetooth, NTC) and a robust transport case. For other wireless measurements, other optionally available testo Smart Probes are also ideal.<br />
<br />
<strong>*A2L Compliant*</strong>

For completely wireless measurements on refrigeration and air conditioning systems and heat pumps. Thanks to the Bluetooth vacuum probe supplied, you can even measure vacuum without any cables or hoses. You will get the testo 557s smart digital manifold with Bluetooth and 4-way valve block, one testo 552i wireless vacuum probe (Bluetooth), two testo 115i wireless clamp thermometers (Bluetooth, NTC), a 4 hose set&nbsp; and a rugged transport case. For other wireless measurements, the Testo Smart Probes are ideal.<br />
<br />
<strong>*A2L Compliant*</strong>

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<p>The testo 558s offers an intuitive app feel in the manifold, with touchscreen and clear measurement graphs on a large colour display. In addition to the touchscreen, the manifold can also be operated via keys when working with gloves. Thanks to its A3 and A2L compatibility, high robustness with IP54 and hybrid charging system comprising rechargeable and non-rechargeable batteries, the manifold is ideal for every situation.</p>

<div style="background-color: #fff4e5;border: 2px solid #ff9900;border-top-left-radius: 16px;border-top-right-radius: 16px;padding: 1rem;margin: 0 -1rem 1.5rem;">FREE VETO MB3 Bag with purchase, now through July 31st, 2026.<br />
<a href="https://www.testo.com/en-US/promo">>> FIND OUT MORE</a></div>
<p>Start your wireless measurements on refrigeration and air conditioning systems and heat pumps straight away. The practical kit containing the testo 558s digital manifold with Bluetooth connection to the wireless temperature and vacuum probes offers the ideal tools for everyday tasks. The testo 558s offers intuitive operation thanks to its touchscreen and clear measurement graphs on a large colour display. In addition to the touchscreen, the manifold can also be operated via keys when working with gloves. Thanks to its A3 and A2L compatibility, high robustness with IP54 and hybrid charging system comprising rechargeable and non-rechargeable batteries, the manifold is ideal for every situation.</p>

Fast, robust and easy to use: simply hold the air temperature probe in the environment being measured &ndash; and, thanks to the exposed sensor in the probe shaft, you will obtain the air temperature value after only a short response time. The measurement result can be optimized by moving the probe through the air at approx. 1.5 m/s.&nbsp;

NTC Air Probe with a miniDIN type connection allows you to accurately measure air temperature. Compatible with any Testo product with a miniDIN connector, the NTC Air Probe is a solution for a variety of temperature applications.

Temperature - NTC	Measuring range -58.0° to 257.0 °F / -50 to +125 °C ²⁾
	Accuracy ±0.4 °F (-13° to +176 °F) / ±0.2 °C (-25 to +80 °C) ±0.7 °F (Remaining Range) / ±0.4 °C (Remaining Range)
	Reaction time 60 sec
1) Long-term measurement range +125°C, short-term +150°C or +140°C (2 minutes)

General technical data	Weight 3.67 oz. / 104 g
	Dimensions 49 in. / 1250 mm
	Length probe shaft tip 1.969 in. / 50 mm
	Diameter probe shaft 0.197 in. / 5 mm
	Diameter probe shaft tip 0.157 in. / 4 mm
	Cable length 3.609 ft. / 1.1 m
	Fixed cable yes
	Housing ABS / TPE / PUR
	Length probe shaft 4.528 in. / 115 mm
	Product colour grey; Black; silver

Air Probe - NTC

Air Probe - NTC

Temperature - NTC

Temperature - NTC

General technical data

General technical data