Frequently Asked Questions

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General Questions

We carry a large number of items in stock, including replacement protectors, replacement temperature sensors, as well as our most commonly sold electric heaters and temperature controllers. If you want to know the stock status of a specific item, please contact our customer service department via email or phone at 440-974-1300.

Although there are exceptions, the answer is generally no. Process Technology prefers to sell through local distribution channels who can provide on-site assistance with your application needs.

Please contact our customer service department for your local distributor information, feel free to email us with your location and product needs.

Most of our products are manufactured in-house at our factory. Some accessory items (solenoid valves, strainers, vacuum breakers, capacitive level controls) are not.

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Product Questions

Yes, we have changed our designations for protectors in our model numbers and assigned a part number for replacements. For example PII is now P2. Click here for a cross reference chart.

The heater sheath overtemperature “protector” fuse is a required safety device. It is designed to detect when the heater sheath exceeds a predetermined temperature, and trip. The protector must be wired such that when it trips all of the heaters operating in that tank are shut off.

Our industrial electric immersion heaters are designed to heat a variety of non-flammable aqueous (mostly water) process chemistries. Metal heaters are designed and built with a standard watt density of approximately 35W/sq. in. These heaters perform well when the process chemistry has a viscosity and heat capacity close to that of water. However, certain process chemistries (i.e. concentrated sodium hydroxide, glycols, oils) have a higher viscosity and/or lower heat capacities. Therefore, they are unable to absorb the heat and move it away from the surface of the heater quickly enough. For process chemistries like this, we recommend “derated” heaters - a heater with a watt density below 20W/sq. in. PTFE-covered heaters with a standard watt density of 10W/sq. in. area are already considered to be derated.

The “UUU” message typically denotes a bad temperature sensor. If you have a replacement temperature sensor available, try replacing the sensor on the controller. If this does not correct the error message, please contact our service department for additional support. You may also want to visit our comprehensive page of downloadable .pdf files including manuals for controls.

The calibration instructions are included in the temperature controller instruction manual (except for the DLC series controllers). Temperature controller installation manuals are also available online on our Technical page.

No. For a recommended annual calibration of your amp-hour meter, we suggest you contact our customer service department who can quote the calibration charges, the lead time for the procedure, and facilitate the return of the meter to our factory for calibration.

Amp-hour meters are used to track the amount of amp-hours used in a plating tank. Using an amp-hour meter to track the consumption of amp-hours can help measure the amount of metal that is plated onto a batch of parts, calculate the depletion of plating metals in the plating chemistry, and calculate the amount of emissions emanating from the tank. In the United States, non-resettable amp-hour meters are required for measuring emissions in chrome plating process tanks.

Yes. There is no price difference for making a heater with a short riser, but there may be a cost adder for a longer riser. Please contact our customer service department for more information.

Most phosphate baths have the tendency to “build up” onto heated surfaces, such as the surface of an electric immersion heater. This buildup acts as an insulation layer, inhibiting the heat from moving into the liquid and resulting in an overheat condition inside the heater. For heating phosphate baths, Process Technology recommends the DAS Series phosphate heater, or a derated heater (we offer derated metal over-the-side heaters, derated metal L-shaped heaters, derated triple tube metal over-the-side heaters, and derated triple tube metal L-shaped heaters). Both a phosphate and derated heater will result in a reduced rate of buildup.

Almost all of our electric heaters are UL listed (cULus, which includes CSA approval for Canada) and CE compliant. Our temperature controllers are UL Listed, and many of them are also CE compliant. There are a few exceptions, so please refer to the product data sheet or the web page pertaining to a specific product to verify its approvals.

When energized, the surface temperature of an electric immersion heater is much higher than the bulk liquid temperature. Since the tank walls are not the source of heat, they are typically the same temperature as the bulk liquid temperature. In addition, the heater sheath is much thinner than a typical metal tank wall. When you consider that many chemicals are more aggressive or react more quickly at elevated temperature (such as on the surface of an electric immersion heater), the heater sheath may be subject to chemical attack when the tank wall is not.

Often enough to avoid buildup, although frequency varies upon application, solution, frequency of use, etc. Contact your chemical supplier for specific cleaning instructions.

The purpose of the ground connection is to minimize the chance of a shock hazard for an operator or equipment. A ground connection on an electric immersion heater is required by the National Electric Code and is also a required part of the UL Listed construction.

Coil insulators are recommended for all metal coils that will be installed in an electrified plating tank. The coil insulators are simply pipe couplings fabricated from a non-conducting material. The purpose of the coil insulators are to prevent a stray voltage from traveling to the immersion coil and give the coil an anodic or cathodic charge, either of which could result in corrosion or plate-out on the coil.


Yes. Please supply your email address to our customer service department when you make this request.



We are unable to offer this service. We make it a priority to ship all of our customers' orders as quickly as possible and therefore expediting the manufacture of a product is not possible. We can, however, offer the option of an expedited method of shipment (such as UPS Next Day Air) to shorten delivery transit time.

Yes, you may request to pick up the order. We ask that you provide a contact name and phone number so we can call when the order is ready for pickup.

Yes, please email or call our customer service department at 440-974-1300 with your customer order number and we will be glad to provide the tracking number.