The DG-700 pressure and flow gauge, a multifunctional differential gauge with two independent measurement channels, has been improved.

LT17AW is a wireless version of the LT17A digital multimeter. Using the included ET2W wireless transmitter, the technician simply attaches any of the company’s accessory heads to the transmitter.

The TurboTorch Nitrogen Flow Meter (Model#: NFM-TT: P/N: 0386-0849) is the perfect choice for purging HVAC or refrigerator lines prior to the brazing process, says the company.

The ammonia gas sensor module Model 5100-25-IT utilizes smart sensor technology and is network-enabled with a choice or combination of outputs: Serial RS-485 Modbus RTU interface, 4-20 mA, and optional 8-A integral relays.

Today, we have an incalculable number of tools to do at least as many different tasks. Examples include tools for preparing our food, to making wooden furniture, to installing and fixing HVACR systems. It is this last type of tool that we honor with the 2011 Dealer Design Awards in the Tools category.

Products that test and monitor make working with and on units so much easier for contractors and technicians, including when it comes to troubleshooting. The winners of the Testing & Monitoring Products category of the 2011 Dealer Design Awards share these traits.

A variable frequency drive (VFD) fails to vary the discharge-air fan speed. A motor overheats and fails prematurely. While each troubleshooting problem in an HVAC system presents its own unique set of circumstances, HVAC professionals may recognize such problems as possible power quality issues.

Is online buying becoming just as important as one phone call and a pickup at the parts counter? Maybe the HVAC trade isn’t ready to concede that online buying will surpass local purchases or put a big hit on traditional relationships. Yet, online sellers are making themselves hard to ignore and are working to make the buying experience quick and convenient.

The problem is a common one: A smell like dirty socks emanates from HVAC ducts. When the people in one facility complained, Warren Lowe, an HVAC maintenance mechanic for a major Midwest electric utility, packed up his tools and headed for the site.

Accurately troubleshooting and repairing refrigeration systems requires technicians to use many specialty instruments. They base many of their diagnoses on what is read from these instruments. Relying on them to be consistently accurate day in and day out is a must. If these tools are inaccurate, more than likely the diagnoses will be inaccurate.