New Testo Non Sight Glass Refrigeration Manifolds

Testo is well known in the HVAC industry for our fantastic range of digital refrigeration manifolds. Until very recently many refrigerant manifolds have featured a built-in sight glass, enabling the engineer to observe the flow and condition of the refrigerant. This is a useful additional feature, although in no way is it an essential requirement.

However due to a change in recommended standards from the Institute of Refrigeration (IOR) – Testo Limited has expanded our already well regarded range of refrigerant manifolds to offer Non Sight Glass variants of both the Testo 557 and the Testo 570 digital manifolds.

NSG Manifolds Banner

In response to a very small number of incidents where the incorrect use of refrigerant gauges has led to sight glass failure, the Institute of Refrigeration (IOR) has recommended that manifolds with sight glasses should not be used for strength or pressure testing.

It is important to mention that Testo manifolds have never had a recorded incident of a sight glass failure, indeed, under test conditions it proved impossible to break a testo sight glass even at pressures of over 400 bar! However, in response to increased demand from companies requesting non-sight glass manifolds and the IOR guidelines, Testo are pleased to be able to announce that the Testo 557 and 570 manifolds are now available without the sight glass option.

Non Sight Glass Refrigerant Manifolds – Making the Strong, Stronger.


About Testo Limited

We offer an extensive range of instruments for many parameters and applications including; Temperature, Humidity, Velocity, Gas analysis, RPM, Pressure, Light, pH, Sound. testo instruments are widely used in the following sectors: HVAC-R: heating, ventilation, air conditioning and refrigeration. Process Industry: manufacturing industries, service companies and utilities. Food Sector: including food manufacture, transport, storage, distribution and retail. Thermal Imaging: for building surveys, maintenance, electrical inspections and production monitoring.

Posted on March 7, 2014, in Commercial, Environmental, Health and Safety, hvac, Industry, Latest News, News, Product Launches, Refrigeration, Safety and tagged , , , , , . Bookmark the permalink. 7 Comments.

  1. Loving that, just need you to sort wolseley a part number or for the 570’s and I’ll have one!

    • Hi Owen,

      Wolseley part number should be available in the near future – But in the meantime you can always visit the Testo website directly for pricing & technical specs. –

      • Just a thought, Any chance of getting my 175T3 data logger compatible with the easy cool software for my 570’s,or just compatible with the 570’s in general? It seems strange that the two don’t speak to each other and I’ve had to install yet another piece of software just to allow my data logger to work. I do appreciate the size of the 175T3 software so perhaps this might not be possible. But integration of the two items would be wonderful, beneficial and to me certainly makes sense to gain a better understanding of a unit you might be running in test for say a 24 hr period after extensive repairs???

  2. Morning Owen,
    Unfortunately you are absolutely correct and at the moment these two testo products do not have the capability of ‘talking’ to each other. However, greater integration and communication between products is something which testo has taken on board as a suggestion and will be looking at in the future.
    Best regards,

  3. The Non Sight Glass Manifolds are now available Direct from Testo and through both Wolseley and Climate Center. The Wolseley part numbers that you mentioned – For the Testo 570-1: “493093 and for the Testo 570-2: “493094”.

    • Picked mine up today, great addition to my collection. I must say the brushed steal effect looks great where the sightglass used to be. On a different note I must say I love how the amp clamp when connected compliments the 570’s. My customers do too. The print off’s left in my London data centre today are second to none! Already winning work for me to. I guess you just can’t argue with date, time and a world of information stuck on a process cooling unit hey!

      • Glad to hear that you’re happy with it Owen. It really is an instrument that we are very proud of here at Testo and it means a lot to hear good things back from our customers – Thanks for the kind words!

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