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How to Choose the Right Infrared Temperature Sensor for Your Application

2025-07-01T12:35:10-05:00

How to Choose the Right Infrared Temperature Sensor for Your Application

Selecting an infrared temperature sensor (IR sensor) depends on your application needs, environmental conditions, and desired accuracy. Here’s a step-by-step guide to help you choose the right one:

1. Define Your Application Requirements

Ask these questions:

What temperature range do you need to measure?
What target size are you measuring?
What is the distance between the sensor and the target?
Is the target moving or stationary?
What material is the target made of (metal, plastic, liquid, etc.)?

2. Key Specifications to Consider

Temperature Range

Choose a sensor that covers your expected minimum and maximum temperatures.

Distance-to-Spot Ratio (D:S)

Also called optical resolution.
Higher ratios = more precise at longer distances.
Example: D:S = 30:1 means at 30 inches away, it reads a 1-inch spot.

Spectral Response

Most common is 8–14 µm (general use).
1–2 µm for metals or high-temp objects.
Match the wavelength to your material’s emissivity characteristics.

Emissivity Adjustment

Make sure the sensor has adjustable emissivity (0.1–1.0) if your material isn’t perfectly black.

Response Time

Fast response (<100 ms) is important for moving objects or fast-changing temps.

Output Type

Analog (4–20mA, 0–10V), Digital (Modbus, RS485), or Thermocouple output.
Choose based on your system/controller compatibility.

3. Environmental Factors

Ambient Temperature: Some sensors have built-in cooling or protection for hot environments.
Dust/Moisture: Use IP-rated enclosures or protective windows for harsh environments.
Vibration/Shock: Choose ruggedized sensors for industrial settings.

4. Mounting and Size

Consider space for mounting.
Some sensors are compact or come with aiming lasers or sights for precise targeting.

5. Calibration and Certification

Look for NIST-traceable calibration if required.
Some industries (e.g., food or pharma) may require FDA or ISO compliance.

Example Use Case:

Measuring motor housing temperature from 3 feet away

Temperature range: -20°C to 150°C
D:S ratio: At least 30:1
Emissivity adjustment: Yes (for painted metal surface)
Output: 4–20mA to connect to PLC
Environment: Dusty – needs IP65 housing

We have decades of experience selling infrared (IR) temperature sensors in various applications. If you have any questions on what IR sensor is best for your application give us a call at (888) 886-8185 or send us an email.

NEMA 4X vs. IP66 Enclosure Ratings: What’s the Difference and Which Do You Need?

2025-06-20T16:10:35-05:00

NEMA 4X vs. IP66 Enclosure Ratings: What’s the Difference and Which Do You Need?

When choosing an electrical enclosure for harsh environments, two common standards you’ll encounter are NEMA 4X and IP66. While both ratings indicate strong protection against dust and water, they originate from different systems and have key differences that could affect your application. In this post, we’ll break down what each rating means, how they compare, and how to choose the right one for your needs.

Understanding the Basics

What is NEMA 4X?

NEMA (National Electrical Manufacturers Association) enclosure ratings are primarily used in North America. A NEMA 4X rating indicates that the enclosure:

Protects against windblown dust and rain, splashing water, and hose-directed water
Is suitable for indoor and outdoor use
Provides corrosion resistance
Offers an additional layer of protection not found in standard NEMA 4 enclosures, namely resistance to harsh, corrosive environments (e.g., salt spray or chemical exposure)

What is IP66?

The IP (Ingress Protection) rating system is defined by the IEC (International Electrotechnical Commission) and is used internationally. An IP66 rating breaks down as:

6 (First Digit): Completely dust-tight. No ingress of dust; complete protection against contact.
6 (Second Digit): Protected against powerful jets of water (12.5mm nozzle) from any direction with no harmful effects.

NEMA 4X vs. IP66: Key Differences

NEMA 4X vs. IP66: Key Differences
Features	NEMA 4X	IP66
Standard	NEMA 250 (North America)	IEC 60529 (International)
Dust Protection	Yes	Yes
Water Protection	Protected against powerful jets of water
Corrosion Resistance	Yes	Not inherently tested
Ice Formation Protection	Yes	Not specified
Indoor/Out Use	Yes	Yes

Practical Implications

Corrosive Environments: If your enclosure will be installed in a marine, coastal, or chemical-heavy environment, NEMA 4X is the better option because it specifically includes corrosion resistance.
Global Projects: For projects requiring international compliance, IP66 might be preferred, especially if the project adheres to IEC standards.
Water Exposure: Both ratings offer excellent water protection, but NEMA 4X also addresses ice formation, which is beneficial in cold climates.

Which Should You Choose?

Choose NEMA 4X if:

You’re operating in North America
The environment includes corrosive elements (e.g., saltwater, chemicals)
You need ice protection

Choose IP66 if:

You’re dealing with international standards
You need assurance of dust-tight and high-pressure water protection
Corrosion resistance isn’t a concern (or is addressed separately)

Final Thoughts

While NEMA 4X and IP66 offer similar levels of protection against dust and water, NEMA 4X goes a step further by accounting for corrosion and icing conditions. Your decision should be based on the environment, regulatory requirements, and specific application needs.

We have over 18 years of experience selling electrical enclosures in various applications, including industrial control panels, power distribution, telecommunications, renewable energy, water and wastewater treatment, and medical equipment. If you have any questions on what enclosure is best for your application give us a call at (888) 886-8185 or send us an email.

NEMA 4X vs. NEMA 6P: Understanding the Differences

2023-12-01T10:24:53-06:00

When it comes to industrial enclosures, NEMA (National Electrical Manufacturers Association) ratings stand as a benchmark for classifying enclosures based on their ability to protect electronic components against various environmental conditions. Two common NEMA ratings that often get confused are NEMA 4X and NEMA 6P. While these ratings might seem similar at first glance, they cater to distinct requirements, each with its unique set of capabilities.

NEMA 4X Rating (IP67):

The NEMA 4X enclosure is designed to offer robust protection against environmental factors. It's built to withstand ingress from dust, dirt, and debris while also being fully watertight, impervious to even powerful jets of water. This makes it an ideal choice for applications exposed to harsh weather conditions, wash-downs, or environments where corrosion resistance is crucial.

NEMA 6P Rating (IP68):

On the other hand, the NEMA 6P rating is specifically geared towards underwater and submersible applications. Enclosures with a NEMA 6P rating are not only dust and weather resistant like NEMA 4X but are also capable of withstanding prolonged submersion in water, making them suitable for installations in underwater or marine environments. These enclosures are rigorously sealed to prevent water ingress even when submerged at specified depths, ensuring the protection of the enclosed equipment from the challenges posed by aquatic environments.

Choosing Between the Two:

When deciding between NEMA 4X and 6P enclosures, the choice depends on the specific environmental conditions the equipment will face. If the application involves exposure to water, submersion, or marine environments, the NEMA 6P is the suitable choice. However, if the concern is directed more towards washdowns, extreme weather, or corrosive elements without submersion requirements, the NEMA 4X should suffice.

In conclusion, while both NEMA 4X and 6P enclosures are designed to safeguard electronics against environmental hazards, the difference in their waterproofing capabilities, particularly in submerged conditions, is the key factor to consider when selecting the appropriate enclosure for a particular application. Understanding these distinctions is crucial in ensuring the longevity and reliability of the electronic components housed within these protective enclosures.

If you have any questions if a NEMA 4X or 6P enclosure is the ideal solution for your application give us a call at (888) 886-8185 or send us an email.

7 Tips for Choosing an Enclosure Filter Fan

2023-12-01T10:24:45-06:00

When it comes to protecting sensitive electronic equipment housed within enclosures, maintaining an optimal operating temperature is crucial. Enclosure filter fans are an essential component of thermal management systems, designed to expel hot air and draw in cooler ambient air. We’ll guide you through the process of selecting an enclosure filter fan to ensure the reliability and longevity of your electronics.

1. Consider the Environment

Factors such as ambient temperature, humidity levels, solar radiation, and the presence of dust or contaminants will influence fan selection. It is recommended that the filter fan’s IP or NEMA rating meets or exceeds those of the enclosure. In wash down scenarios or when encountering snowy conditions, some manufacturers offer rain hoods, which provide an additional layer of protection against water infiltration and snow accumulation.

2. Assess Heat Load

Begin by calculating the heat load generated by the electronics inside the enclosure. This involves identifying the total wattage of components, including power supplies, drives, PLCs, relays, and any other heat-producing devices. Reference the manufacturers’ technical specifications which can be found either in their data sheets or manuals.

3. Determine Required Airflow

Based on the heat load, you can calculate the required airflow rate (measured in cubic feet per minute, CFM) using an enclosure cooling calculator. As a rule of thumb, each filter can reduce the airflow by about one third. Therefore, when selecting the fan size, the free flow CFM should be three times the required air flow rate calculated to provide sufficient cooling.

4. Enclosure Size and Material

In general the larger the surface area of the enclosure, the better it can disperse the heat. Also, certain types of enclosure materials will dissipate heat more effectively than others. Painted steel and non-metallic enclosures radiate heat better than stainless steel or unfinished aluminum.

5. Fan Size and Voltage

Select a fan size that fits the available space in the enclosure while providing the required airflow. Ensure the fan operates at the appropriate voltage to match your AC or DC power supply.

6. Noise Level

Consider the noise level produced by the filter fan, especially if the equipment is located in a noise-sensitive environment. Manufacturers typically provide noise level information in decibels (dBA) or offer low-noise versions of their fans. Some fans are designed to operate quietly, while others may be noisier but offer higher airflow.

7. Installation and Maintenance

Choose a fan that allows straightforward mounting and easy filter replacement. It is recommended to install the filter fan near the bottom of the electrical cabinet since cooler ambient air is more dense. On the other hand, place the exhaust filter near the top since warm air rises.

Final Considerations

The “rule of thumb” is that for every 18°F (10°C) over the rated temperature limit, the life expectancy of the electronic components gets cut by 50%. That being said, best practice would be to keep control cabinets internal temperature at or below 95°F (35°C). We recommend adding a normally open (NO) thermostat to the system. This device activates the fan when the enclosure temperature exceeds a set threshold, ensuring energy efficiency.

Filter fans are a good choice when the environment is free of containments or gases and ambient temperature is lower than the desired temperature within the enclosure. If that is not the case, a closed-loop system like an air conditioner is recommended.

Selecting the right filter fan will pay off in improved equipment reliability and reduced downtime. By calculating heat loads, considering the environment, and choosing the appropriate fan size/CFM, you can ensure effective temperature control and extend the life span of your electronics. Proper installation and regular maintenance are equally crucial to the fan system's performance.

If you have any questions on what enclosure filter fan is best suited for your application give us a call at (888) 886-8185 or send us an email.

How to Select the Right Electrical Enclosure

2023-11-30T17:41:54-06:00

With an almost limitless variety of enclosures on the market we want to help our customers specify the right one the first time around. Here are the 4 things to consider when choosing an electrical enclosure.

1. Environment

What kind of environment does your enclosure need to withstand? This is the most important question and will determine the longevity of your enclosure and the components inside. Is there rain, snow, dust, salt water, or solvents: all of these environmental threats correspond to a National Electrical Manufacturers Association (NEMA) or International Electrotechnical Commission (IEC) rating.

For example, a NEMA 4X (IP66) enclosure protects against rain, dust, salt spray, and offers corrosion resistant properties. However, if your application is less harsh, NEMA 1 enclosures are general purpose, economical, and ideal for indoor applications. NEMA 4 or 12 enclosures would suit most applications in between. NEMA 12 (indoor) provides protection from dust and dripping water while NEMA 4 (indoor/outdoor) can guard against hose directed water. The environment also determines what material the enclosure needs to be.

2. Material

Enclosures are made from a variety of materials including abs plastic, carbon steel, fiberglass, polycarbonate, and stainless steel. When choosing which material is best for your application you also need to consider factors like price, aesthetics, thermal issues, and weight.

304 Stainless Steel

Stainless steel is a more costly option. Type 304 resists oxidation and provides protection from corrosive solvents, alkalis, and some acids making it ideal for wash down applications.

316 Stainless Steel

Type 316 has additional material properties compared to 304 that give it improved resistance against sulfates, bromides, chlorine, chlorides (de-icing salts & sea water), high temperatures, and some special acids.

ABS Plastic

ABS is lightweight, durable, scratch-resistant, easily machined, and has excellent electrical insulating properties. Also, one of the most cost-effective enclosure solutions on the market. Very good chemical resistance to diluted acids, diluted alkalis, and oils and greases.

Aluminum

Naturally resistant to corrosion, durable, and lightweight. Highly conductive making it an excellent choice to dissipate heat away from electronics and shields against EMI/RFI.

Carbon Steel

[CARBON STEEL CONTENT ]

Fiberglass

Fiberglass reinforced polyester (FRP) exhibits high impact resistance, large temperature range, excellent dimensional stability and electrical properties. Can be easily punched, drilled, or cut compared to metal enclosures.

Polycarbonate

Can withstand up to 900 psi, giving it superior impact resistance. Easy-to-modify, aesthetically pleasing, non-conductive, and lightweight. Good corrosion resistance with some acids but not rated for use with organic solvents or alkalis. Does not block wireless signals.

3. Size

First you need to find out the length, width, and height of your project with all the components when mounted on a back panel. With that, you now know your minimum internal dimensions of the enclosure. Keep in mind pushbuttons, interfaces, and panel meters mounted on the cover will take up some of the depth. You can size up accordingly if heat dissipation is a factor or want to leave some space to make it easy for wiring. Lastly, if the enclosure is fitting into an existing footprint make sure to double check external dimensions.

4. Does it need Thermal Management?

Heat naturally dissipates from enclosures but in many cases natural cooling or heating is not enough for an application. For most electrical devices the temperature should not exceed 104 F (40 C). We recommend checking the specifications on the components manufacturers data sheet or manual for the operating temperature. Metallic enclosures conduct and dissipate heat better compared to non-metallic enclosures. This may not always suit your component's temperature requirements.

Thus, thermal management must be considered since overheating/freezing will damage or shorten the life of your devices. Vent kits, exhaust fans, and air conditioners can be used in conjunction with thermostats to regulate heat. Heaters and hygrostats can also be used to control condensation in damp environments.