Make the most of your Wireless HVAC Refrigerant Scale SR47 

Here are a few ways that the Fieldpiece Wireless HVAC Refrigerant Scale SR47 is designed to make life better for HVACR techs in the field.  

Larger platform but still portable
As soon as you take it out of the carrying bag, you might notice its large 13-inch platform which is able to handle even larger tanks—we’re talking up to 252 pounds. The scale easily fits into its carrying case that slings over the shoulder meaning the highly portable SR47 is small enough to be carried anywhere while also handling even the biggest jobs. 

Tough as it looks
The new integrated rubber bumpers don’t just make it look pretty. Along with being able to handle larger tanks, the SR47 platform features an IP54 rating so it withstands jostling, splashes, dirt, dust and just about anything a tech comes across in the field. Set it where it needs to be set. The SR47 has you covered. 

The most accurate
The SR47 is more than just big and tough. It’s accurate. For a tech recharging a system, knowing exactly how much refrigerant is being added is critical to helping the system run at peak efficiency. This wireless scale offers industry-leading accuracy of: ±0.03% rdg + 0.25 oz. That means you’ll know exactly how much refrigerant charge you’re adding. Nothing on the market comes close to matching this. 

Wireless convenience
The SR47 isn’t an HVAC scale that needs to be babysat during a charge. It comes with a handy, back-lit IP64 rated remote that’s easy to read and stores inside the scale when not in use. The SR47 also works seamlessly with the Job Link® System App and the Fieldpiece SMAN Digital Manifolds, SM380V and SM480V. With an industry-leading 1000’ wireless range, a tech can keep an eye on the charge from anywhere on the jobsite while easily documenting and saving customer data. 

Week-long battery life
Most wireless tools have limitations in terms of battery-life, but the SR47 bucks that trend. The battery in the platform lasts for more than 200 hours.  

The Wireless Refrigerant Scale SR47 was designed to be easy for techs to use, tough enough for any jobsite, and smart enough to communicate with the Job Link® System App. That’s because it’s a Fieldpiece.   

Learn more about the HVAC Wireless Refrigerant Scale SR47 and all Fieldpiece products. 


Press Releases


New Refrigerant Scale Breaks the Mold with Expanded Durability, Accuracy and Portability to Support HVACR Field Professionals 

ORANGE, CALIF., SEPTEMBER 01, 2022Fieldpiece Instruments today announced the launch of an upgraded Wireless Refrigerant Scale, model SR47, for HVACR contractors and technicians. The latest model will replace the industry workhorse, Fieldpiece’s SRS3. The newly upgraded wireless refrigerant scale is yet another gamechanger to make HVACR industry tools more efficient and effective with the ultimate performance and durability in a compact, portable design. Industry-leading battery life, wireless range and accuracy offer unmatched reliability and convenience. 

HVACR industry technicians rely on refrigerant scales for AC system installation and maintenance to accurately measure the weight of refrigerant – critical for the refrigeration industry. Scale accuracy is especially important when considering that no two system refrigerant requirements are the same.  The new Fieldpiece Wireless Refrigerant Scale, SR47 is designed to meet those needs, and is ideal for residential or commercial HVACR technicians that need to charge and recover refrigerant quickly and move on to the next job. 

“We designed a wireless refrigerant scale that we knew the industry needed most for the best accuracy, durability and portability,” said Jeb Ball, Vice President of Sales and Marketing at Fieldpiece Instruments. “As an HVACR industry leader, we are proud to provide the most rugged and dependable tools offering the best possible range in the field.”  

The SR47’s 252-pound maximum load capacity accommodates any charge or recovery requirement, while its oversized 13-inch platform design with unique integrated bumpers is engineered to fit any refrigerant tank. It also features the best platform battery life in the industry with a long life of up to 200 hours, which maximize jobsite uptime by removing the need to change or recharge batteries. 

The SR47 offers industry-leading wireless 1000-foot range with the Job Link® System App, allowing technicians to easily capture data and send reports or invoices, and it integrates with other tool measurements such as SMAN digital manifolds. Its wireless remote can be easily stored in a handy niche located under the scale and it boasts an improved rubber gasket grip design, shorter length, slightly larger display and a redesigned magnet, plus a hefty 80-hour battery life. 


Technicians need tools that are lightweight yet durable enough to withstand wear and tear in field conditions. The Wireless Refrigerant Scale, SR47 meets both requirements. Its compact size and lightweight seven-pound portability make it easy to carry up a ladder while its rubberized corners offer robust impact protection. Wet weather is no barrier to performance – the SR47 is weather resistant with an IP64 rating for the remote and an IP54 rating for the platform so techs can work in the rain if they need to. 

This new “heavyweight champion” from Fieldpiece also comes with a protective case that’s easy to carry over the shoulder between jobs from residential sites to commercial rooftop units and includes protective padding to withstand truck or van transport and storage. A raised power button at the base of the scale improves usability and ergonomic design. As with any Fieldpiece tool, technicians can take advantage of the exceptional Fieldpiece live technical product support for one-on-one product guidance. 

For more information, visit: 

ABOUT FIELDPIECE: Fieldpiece Instruments is an innovative technology company focused on helping industry professionals do their jobs easier, faster and better. It delivers on this promise through industry-leading devices and a broad range of professional-grade tools and technology inspired by real-world application and field use. Fieldpiece is focused on serving the HVACR industry exclusively, enabling HVACR professionals to become masters of the trade. Discover more at, and follow Fieldpiece on Facebook, Instagram, YouTube and LinkedIn 

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HVAC Combustion Analyzers | Tough Enough for Any Heating Job.

The all-new Fieldpiece Combustion Analyzers, CAT85 & CAT45, offer the ultimate ease of use, reliability, and durability.

Our HVAC Combustion Analyzers offer next-level innovation
· Accurate measurement of O2, CO, CO2, draft pressure
· SensorVault™ technology prolongs sensor life
· Job Link® System App integration
· Live draft pressure (CAT85 only)
· Flue probe with HydroCycle™ pump – automatically separates and returns water to the flue ( CAT85 only)
· Built-in dual port manometer ( CAT85 only)


Fieldpiece Instruments launches NEW Combustion Analyzer models!

Fieldpiece Instruments, the leading manufacturer of professional-grade tools for HVACR pros by HVACR pros, announced the launch of two new combustion analyzers, with compatible printers sold separately or bundled together. The new Fieldpiece Combustion Analyzers, CAT85 and CAT45, enable HVACR professionals to assess heating system emissions, draft pressure, and temperatures to support the overall fuel-efficiency and safety of furnaces. These new combustion analyzer models make analysis easier and more effective with a large touchscreen display interface delivering effortless readings, new sensor technology that maximizes uptime on the jobsite, a convenient rechargeable battery, and industry-leading wireless range when used with the Job Link® System App.

Tech Articles

Improve Your Productivity With Our Wireless Tools

The next time you’re on a service call, the technology built-into your Fieldpiece wireless tools can make your time as efficient as possible. To make the most of that technology, here are a few steps to consider following:

  1. Understand the symptoms

Using wireless tools makes the troubleshooting process easier, faster and better but before we begin, it’s important to clearly understand the problem so we can determine what analysis needs to be performed. To do that, use your most important tool: Your ears. Often, when a customer is asked what’s wrong with their system, we hear: “It doesn’t work.” We know that answer doesn’t get us any closer to finding the actual problem, so it’s time to play detective.

The customer doesn’t need to be an expert in HVACR to help. But it helps to ask the right questions that may lead to finding the problem. Consider questions like: Does the system turn on? Do you hear any strange noises when it’s running? Does the system blow cold air? Does the system blow any air at all?

Let the customer speak and listen to what they say. The more useful information we gather from the customer up front, the better able and faster you’ll be to figure out the issue.

  1. Find the problem

Once you’ve asked the right questions and begin to understand the problem, it’s time to get to work figuring out the issue. Based on what you got from the customer, you should now have a better idea of what could be causing the problem.

If the system turns on, it’s a good idea to begin with simple, quick visual inspections of the system. These include making sure the return air filter is clean, checking the outdoor unit for excessive debris that may be restricting airflow and using your hand to see if cold air is blowing from the supply vents. These quick and easy to perform checks help eliminate some possible problems right from the start.

If the system doesn’t turn on, the issue more than likely is electrical. Use the Fieldpiece Wireless Clamp Meters, SC480 and SC680 to take voltage measurements at the thermostat and the outdoor unit. Also, be sure to check the fuses. This should be a good indication if there is an electrical issue with the system.

Here are some of the main tests typically run to fully understand system performance. First, you’ll want to do an airflow check, then check the refrigerant charge.

Checking Airflow via Temperature

It’s often a good idea to start with airflow. After all, airflow is everything. First, use the Job Link® System Flex Psychrometer Probes®, JL3RH, to measure the Delta T. Attach one of the two JL3RH probes on the return side of the evaporator and the other on the supply side. This helps to understand the heat transfer that’s happening across the evaporator. When measuring this, look for a Delta T around 20 Fo. While this is a good rule of thumb, it’s a good idea to verify the manufacturer’s specs for their ideal Delta T.

If there is a low Delta T, it doesn’t necessarily mean there’s definitively an airflow problem. A low value could also come from a refrigerant charge issue so it’s important to check both airflow and refrigerant charge.

Checking the TESP

To further understand the airflow, measure the Total External Static Pressure (TESP) across the air handler.

To measure this, use the Dual Port Manometer Kit, JL3KM2. When placing these probes around the air handler, check with the manufacturer’s recommendations. However, one probe should be positioned to measure static pressure before the air handler and one to measure static pressure after the air handler. Point the tips of the static pressure probe into the airflow.  The JL3KM2 static pressure probes are designed with a red arrow on the magnetic base of the probe to ensure it’s pointed in the correct direction. Before inserting the probes into the unit, make sure to zero out the manometers – this helps get the most accurate measurement.

Once the data is acquired, the Job Link® App takes both static pressure measurements and automatically calculates the TESP. Compare this to the manufacturer’s max static pressure specifications. If the TESP is higher, there’s probably resistance to the airflow like a dirty return air filter, leaks in the ductwork, improper fan settings or poorly designed ducts. Examine all of these to determine what’s making the system perform poorly.

Checking the Superheat and Subcooling

After checking the airflow, it’s a good idea to move on to the refrigerant charge. Do this by measuring the system’s superheat and subcooling values. The SMAN Digital Manifold and the Job Link® Pressure Probes and Pipe Clamps are specifically designed to capture these readings and compute the correct values. When the superheat and subcooling are measured you have better insight whether the system has the correct amount of refrigerant.

Since these levels can also be affected by improper airflow, measure both the airflow performance and refrigerant charge at the same time. This helps see the whole picture and create a more accurate diagnosis of the system.


  1. Fix the problem

Improving airflow.

If it’s determined that airflow is the culprit, make the necessary adjustments to dial in the airflow. Start with cleaning or replacing all air filters, cleaning fans, fixing duct leakages, and adjusting fan speed as needed. Check with the system manufacturer to determine ideal fan settings.

Recharging the system.

If it’s determined the refrigerant charge is low, it’s important to find out why. Use a reliable refrigerant leak detector to inspect the system for leaks. If found, responsibly recover the refrigerant as needed and perform the repair. Once complete, perform a proper system evacuation to remove all moisture and non-condensables from the system before recharging with the correct amount of refrigerant.

Know you’re right

While measuring and testing the system with wireless tools, it’s okay to leave these in place as adjustments are made. Then after service is complete, re-run the TESP and Delta T tests to see if the system is performing better. Be sure to also measure the subcooling and superheat to check that the refrigerant charge is correct. Since these are wireless tools, there is no wasted time re-attaching the meters and gauges. You can leave them in place as you work. Also, as you move around the system throughout the service call, you can recheck these values to gain a real-time picture of the improving health of the system.

Call-out #1
Measuring Real-Time Power Consumption

The Fieldpiece Wireless Clamp Meters, SC480 and SC680 offer a unique tool while on service calls – showing customers how much energy their system is consuming. Most other meters on the market don’t have this feature. First, at the outdoor unit attach test leads to measure incoming VAC on the L1 and L2 terminals. Then use the amp clamp on the L1 or L2 wire. Set the dial to the W position and the meter displays real-time power consumption in kW.

Before performing the service call, measure the power consumption. And then, do the same at the end. Show the customer a before and after power consumption comparison to validate the work completed and to build trust.

 Call-out #2
Rapid Rail® Sensor Technology

The Job Link® System  Pipe Clamps JL3PC and  the large JL3LC use revolutionary, patented technology to measure temperatures in a pipe. It’s called Rapid Rail® Sensor Technology and it offers more accurate, faster readings. Since the copper of a pipe is electrically conductive, the Rapid Rail® Sensor uses the pipe itself to complete the sensor circuit and measure the temperature. This provides a more accurate and a more stabilized reading in just a few seconds and it isn’t affected by the ambient air conditions. This innovation  saves time and is far more accurate than other pipe clamps.

Call-out #3
Testing Variable Frequency Drives (VFDs)

Many times when testing the electrical components of a newer system, you come across Variable Frequency Drives (VFDs). These are designed to be more energy efficient by ramping up and down based on the systems required load – instead of just running at either 100% or 0%. The SC680 and SC480 measure VFD voltage more accurately by filtering out the electrical noise that’s present on the exiting voltage signal. Other meters on the market not designed for VFDs can’t filter out the signal noise and won’t give an accurate reading.

Contact Fieldpiece today to learn more about our wireless tools and improve your productivity on the job.


Combustion analyzers that could only come from one company: Fieldpiece

As soon as a tech picks up a Fieldpiece Combustion Analyzer CAT85 or CAT45, they’ll know these robust, reliable tools are 100 percent Fieldpiece. They are sturdy, easy to use and packed with features that techs need. There’s nothing extra and nothing wasted. These combustion analyzers are built for pros by pros.

First and foremost, they are from Fieldpiece, so techs know they’re using something that’s durable and built to perform in the field. From the one-touch start-up to the large, 5.5-inch displays, the CAT85 and CAT45 are built to quickly measure O2, CO, CO2, draft pressures and more. The bright screen makes it easy to view measurements, whether your jobsite is a dimly lit basement or bright rooftop. Also, they feature sturdy construction, rubberized casings and a magnetic back that easily sticks to ductwork to let the tech work hands-free. The padded hardline carrying case also includes multiple inserts for a printer and accessories.

The CAT45 is designed for techs working on residential furnaces. The CAT85 is for techs working in the trenches on residential furnaces and light commercial jobs and features a built-in dual-port manometer – meaning one less tool to carry to the job. What’s more is that the CAT85 automatically separates and returns accumulated water to the flue using the patent-pending HydroCycle™ Pump technology that saves time.

In both the CAT85 and CAT45, the sensors have a four-year warranty and are easy to change in the field – maximizing your uptime. Their patent-pending SensorVault™ technology seals the sensors from the air during storage extending sensor life and lowering the cost of ownership.

One other thing that makes the Fieldpiece CAT85 and CAT45 combustion analyzers unique is that right out of the box they seamlessly connect to the Fieldpiece Job Link® System App with industry-leading 1000’ wireless range. From just about anywhere on the jobsite a tech can view trends, draft pressures and customer details, all on one screen. These powerhouse tools also save customer data with dedicated fields for client information. If a job requires advanced diagnosis, a live trend report is available with O2, CO and CO2 readings plus they connect to a wireless printer for jobsites that require documentation printouts.

Learn more about the Combustion Analyzers CAT45 and CAT85 and all of our other innovative products.