Sunday, February 21, 2010

Drum Heaters - Tote Heaters

Drum and Tote heaters are designed to keep materials warm in a pail, drum, tote or cylinder.

Provide practical, efficient means of freeze protection, viscosity control and maintenance of materials at elevated temperatures. A variety of standard sizes are combined with availability of configure-to-order designs to meet a variety of applications.

The heater wraps around the container and contains heating elements with the material to enclose the container and replace the heat loss to keep the media warm. Applications are Viscosity control, freeze protection, temperature maintenance, Biofuel, biodiesel, malting, and thermal mixing.

120 volt heaters come with a cord and plug, 240 volt version will require hard wiring a affixing your own plug. Insulating blankets are highly recommended to increase the effectiveness of the heater.

Please visit Sords Electric to purchase.

Saturday, February 20, 2010

Eco Exit Signs by Jessup

Going green doesn't have to be expensive

The Federal Energy Management Program says that the best available exit sign product uses photoluminescent technology. What’s more, the program directs all federal agencies to not purchase incandescent light bulb or tritium exit signs, and requires facility managers to replace them immediately.

There’s no doubt about it. Buildings today are going green, and you need an easy, economical solution to reduce your carbon footprint. Get the green light with the zero energy, zero maintenance solution – the new, photoluminescent Glo Brite® Eco Exit™ Signs.

By replacing 100 incandescent exit signs in your building with eco-friendly, easy to install Glo Brite® Eco Exit™ Signs, you will save over $3,500 a year in energy costs - while reducing air pollution by almost a half a million pounds of CO2 over the life of the product. Need more proof?

Zero electricity to operate
Zero wiring to run
Zero bulbs or batteries to replace
Zero toxic/radioactive materials
Zero maintenance for 25+ years
Zero problems with safe disposal


- Zero energy consumption - zero cost, green design

- Zero maintenance - no bulbs, no battery replacement

- Non-toxic, non-radioactive

- No disposal cost

- Designed for surface, flag, ceiling or conduit mounting

- Can be used for both high-level and low-level applications

- Movable if egress paths change

- Thin, low profile construction

- Consistent, uniform illumination

- Visible at 100 feet

- Recyclable

- LEED points qualified

- Approved for outdoor\wet locations


Letter size: 7/8” stroke with 7” height

Background: Black, Red, Green

Illumination: High Visibility Green

Visibility: 100 feet, 75 feet, 50 feet

Directional: (2) Chevron arrows included for easy direction selection

Construction: ABS plastic with photoluminescent panel

Durability: Explosion-proof for areas requiring explosion-proof exit signage


UL924 Emergency Lighting and Power Equipment Listed through ETL;

Meets NFPA Life Safety Code 101 and OSHA requirements

International Building Code 2009


Surface, flag, ceiling or stem mounted (hardware included). Before installation

it must be determined that there is a minimum of 5 Fc of fuorescent, metal halide

or mercury vapor light on the face(s) of the sign at all times during building occupancy.


Both high-level and low-level

Listed for outdoor\wet locations

Suitable for Floor Proximity Installation

Visit Sords Electric to view signs and download pdf's.

Monday, February 15, 2010

Heating Cable ~ Heat Trace

Heating cable is also referred to as heating tape and heat trace cable amongst the industry. Heating cable is used for a wide range of applications including pipe tracing, freeze protection, viscosity control, temperature process maintenance, roof and gutter, and much more. There are two main types of Heating Cables, Self Regulating and Constant Wattage.

Self Regulating Heating Cable products are used for freeze protection and process temperature maintenance for a wide range of industrial, commercial and residential applications. These industrial heaters are used to maintain the working temperature of pipes, fittings, valves, tanks and process equipment. Heat Trace cables regulate their heat output in response to changes in temperature. Self regulating heat trace cable can be overlapped and cut to length without loss of heat. It is ideally suited to freeze protection applications and snow melting but can be used in process applications as well. Self-Regulating / Self-Limiting heating cable automatically adjusts heat output based on surface temperature. Ideal for freeze protection and low temperature process maintenance. Self Regulating cable has advantages that is can be overlapped and cut to length without any heating loss on the cable. And In some caes can be used without control, though using a thermostat is always the suggested method fro turning the cable on and off.

Constant Wattage Heating Cables are ideally suited for applications where a particular watt density is required at all times. The heater element consists of a nichrome wire wrapped around parallel, insulated buss wires. Constant wattage cables are flexible, can be cut-to- length in the field, and are manufactured for use on voltages from 120 to 480V. Although not suited for overlapping, its constant output makes it an ideal choice for higher temperature applications where higher watt densities are required. Constant Wattage Cables are Equipped with a ground braid and can have an optional FEP jacket. Constant-Wattage heat trace provides precise and constant temperatures up to 500oF (260oC). Ideal for a wide range of applications. Constant wattage cable can be cut to length but there will then be a cold spot (unheated length) of cable that must be managed when you splice the cable together. Constant wattage cable must not be overlapped as it will over heat where the cable comes in contact with itself.

The theory behind heat trace is to replace the heat loss from a pipe into the space it travels through. A heat loss calculation is done and the result is a watts per foot of heat loss. To maintain a pipe temperature, the cable must equal or be greater than the heat loss. Heating cable is not good for actually heating up the pipe. It may work in unique applications, but in general it is for pipe temperature maintenance. Pipe trace cable can be used to keep down condensation in pipes when moving solids like flour where water creates a problem.


Wednesday, February 10, 2010

TVSS = SPD ~ Surge Protection

As of September 29, 2009, the newest UL 1449 3rd Edition safety standard for Surge Protective Devices (SPDs) is in effect. If you are responsible for protecting critical electrical systems, you need to know about these changes!

At a Glance the changes are:
  • Suppressed Voltage Rating vs. Voltage Protection Rating - The SPD’s let-through voltage is now measured as it is subjected to an IEEE defined 6kV/3kA “combination waveform".
  • Nominal Discharge Current (In) - The SPD’s Nominal Discharge Current capability, up to 20 kA, is now reported with the suppressor’s specifications and on its labeling.
  • Suppressor Categories - The new standard categorizes SPDs as one of four designated types based upon whether or not they are a component, and where within an electrical distribution they are to be installed.
  • TVSS is now SPD - The term identifying a surge suppressor as Transient Voltage Surge Suppressor (TVSS) was retired and will now be called a Surge Protective Device (SPD).
  • Extended Scope - 3rd Edition UL now governs suppression products designed to protect on electrical circuits up to 1000 V.

Saturday, February 6, 2010

Proximity Sensor and Switches

A proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact. A proximity sensor often emits an electromagneticor electrostatic field, or a beam of electromagnetic radiation (infrared, for instance), and looks for changes in the field or return signal. The object being sensed is often referred to as the proximity sensor's target. Different proximity sensor targets demand different sensors. For example, a capacitive or photoelectric sensormight be suitable for a plastic target; an inductive proximity sensor requires a metal target.

Proximity sensors can have a high reliability and long functional life because of the absence of mechanical parts and lack of physical contact between sensor and the sensed object.

Inductance is the property in an electrical circuit where a change in the electric current through that circuit induces an electromotive force (EMF) that opposes the change in current (See Induced EMF).

In electrical circuits, any electric current, i, produces a magnetic field and hence generates a totalmagnetic flux, Φ, acting on the circuit. This magnetic flux, due to Lenz's law, tends to act to oppose changes in the flux by generating a voltage (a back EMF) in the circuit that counters or tends to reduce the rate of change in the current. The ratio of the magnetic flux to the current is called the self-inductance, which is usually simply referred to as the inductance of the circuit. To add inductance to a circuit,electronic components called inductors are used, which consist of coils of wire to concentrate the magnetic field.

A capacitor or condenser is a passive electronic component consisting of a pair of conductors separated by adielectric (insulator). When a potential difference (voltage) exists across the conductors, an electric field is present in the dielectric. This field stores energy and produces a mechanical force between the conductors. The effect is greatest when there is a narrow separation between large areas of conductor, hence capacitor conductors are often called plates.

An ideal capacitor is characterized by a single constant value, capacitance, which is measured in farads. This is the ratio of the electric charge on each conductor to the potential difference between them. In practice, the dielectric between the plates passes a small amount of leakage current. The conductors and leads introduce anequivalent series resistance and the dielectric has an electric field strength limit resulting in a breakdown voltage.

Inductive switches can be used for counting of metal objects and detection of metal objects with any contact.

Capacitive Switches can be used for level control of water, plastics, foam products or food products.

Both Inductive and Capacitive switches can be made with NAMUR outputs so that the switches can be put in hazardous areas. The connections do need to go through a intrinsic safety barrier.

Most proximity switches are barrel shaped in the 5mm, 12mm, 18, and 30mm diameters. Also very common is the limit style proximity switch. Barrel materials are crastin, plastic, stainless steel, and nickel plated brass.

Sords Electric sells Carlo Gavzzi, ATC, Autonics, EMX and Pepperl and Fuchs proximity switches.