Categories: EMIT

EMIT 50900 Non-Air Assisted Ion Bar System Instruction Manual

EMIT 50900 Non-Air Assisted Ion Bar System


Figure 1. EMIT Non-Air Assisted Ion Bar


The EMIT Non-Air Assisted Ion Bar System has been designed to effectively eliminate localized static charges that exist in the work area. Ionizers are useful in preventing electrostatic charge generation, ElectroStatic Discharge, and ElectroStatic Attraction, as well as preventing equipment latchup. Per ANSI/ESD S20.20 section Protected  Areas Requirement states: “Ionization or other charge mitigating techniques shall be used at the workstation to neutralize electrostatic fields on all process essential insulators if the electrostatic field is considered a threat.” Air ionization can neutralize the static charge on insulated and isolated objects by producing separate charges in the molecules of the gases of the surrounding air. When an electrostatic charge is present on objects in the work environment, it will be neutralized by attracting opposite polarity charges from the ionized air. Note that ionization systems should not be used as a primary means of charge control on conductors or people. (Reference: EN 61340-5-2 clause 5.2.9). The Non-Air Assisted Ion Bar System is a pulsed DC ionizer. The bar’s emitters have alternating polarities over the length of the bar. This design results in less ion recombination than when the same emitter is used to output both polarities. The EMIT Non-Air Assisted Ion Bar System meets the ANSI/ESD S20.20 required limit of less than ± 50 volts offset voltage (balance) tested in accordance with ANSI/ ESD STM3.1. Per S20.20 Discharge Time required limits are “user-defined”.

Unpacking and Inspection
EMIT Controller and Bar Assemblies were carefully packed at the factory in a container designed to protect them from accidental damage. Nevertheless, EMIT recommends careful examination of the carton and its contents for any damage. If damage is evident, do not destroy the carton or packing material. Immediately notify the carrier of a possible damage claim. Shipping claims must be made by the consignee to the delivering carrier. The Non-Air Assisted Ion Bars are available in several sizes. There are six Controller options and several accessory items. See the following table for the list of available item numbers.

Item # Description
50900 Non-Air Ion Bar Assembly, 12″, 4 Emitters
50901 Non-Air Ion Bar Assembly, 24″, 6 Emitters
50902 Non-Air Ion Bar Assembly, 36″, 8 Emitters
50903 Non-Air Ion Bar Assembly, 48″, 12 Emitters
50904 Non-Air Ion Bar Assembly, 60″, 14 Emitters
50905 Non-Air Ion Bar Assembly, 72″, 18 Emitters
50906 Non-Air Ion Bar Assembly, 96″, 24 Emitters
50855 Pulsed Ion Bar Controller, North America
50856 Pulsed Ion Bar Controller, Asia
50940 Controller with Recessed Potentiometer Adjustment, 120V
50941 Controller with Recessed Potentiometer Adjustment, 220V
50950 Ion Bar 2-to-1 Connector Set (2 per pack)
50952 Emitter for Non-Air Ion Bar


  1. Install the Controller console on or near the target area. It must be close enough to connect to the Ion Bar.
  2. Locate and attach the Ion bar in a posistion so that the air ions are directed toward the target area.
  3. Connect the Ion Bar to the back of the Controller console.
  4. Plug the Controller console unit into an appropriate electrical outlet.

One EMIT Controller Console will power up to 40 emitters. It is possible to daisy-chain bars together as long as the total number of emitters does not exceed 40. For example, the EMIT 50902 has 8 emitters (40 ÷ 8 = 5), so up to 5 EMIT 50902 Bar Assemblies can be daisy-chained together using 1 Controller Console. Daisy-chain bars are special order only. The EMIT 50950 2-to-1 Connector Set may be used to power two Ion Bars with one Controller Console.

Figure 2. Using the 50902 2-to-1 Connector Set to Power Two Ion Bars

Ion Bar Sizes and Dimensions

Figure 3. EMIT Non-Air Assisted Ion Bar dimensions

Item # Length Emitters Emitter Spacing Mounting Holes Dim A Dim B
50900 12″ 4 3″ 2 1″ 1.5″
50901 24″ 6 4″ 2 1″ 2″
50902 36″ 8 4″ 2 3″ 4″
50903 48″ 12 4″ 2 3″ 2″
50904 60″ 14 4″ 2 3″ 4″
50905 72″ 18 4″ 3* 4″ 2″
50906 96″ 24 4″ 3* 4″ 2″

NOTE: Contact manufacturer for custom dimensions


NOTE: The following instructions apply to the 50940 and 50941 Controllers only. Please see technical bulletin TB-6570 for operation instructions on the 50855 and 50856 Digital Controllers. There are two adjustments that can be made on the controller: BALANCE (offset voltage) and RATE. The BALANCE of positive and negative ion output can be adjusted to increase polarity bias by turning the BALANCE CONTROL, slowly turning clockwise to increase positive and decrease negative ON time pulses, or counter-clockwise to increase negative and decrease positive ON time pulses. The RATE or pulse frequency can be adjusted down to one pulse per second or up to 20 pulses per second by slowly turning the RATE CONTROL clockwise to increase and counter-clockwise to decrease the frequency.

It is important to verify calibration after any adjustments and before using the Ion Bar System around sensitive electronics. Repeat the Balance Verification steps after all adjustments.
The Ion Bar System has been designed to minimize effects of localized static charges. If your processing involves generation of considerable static charges, you may need more aggressive equipment. EMIT offers a complete line of ionizers: benchtop, overhead and hand ion guns to meet all ionizing requirements.

Measurements are taken with a Charged Plate Monitor placed below two consecutive emitters. Pulsing rate is adjustable from 1 to 20 Hz that will need to be customized depending on application requirement
Discharge Times (±1,000V to ±100V) Distance (inches) Average Time (seconds)
Controller set to

2 pulses / sec (Hz)

18 < 20
Controller set to

2 pulses / sec (Hz)

12 < 5
Controller set to

1 pulse / sec (Hz)

18 < 6
Controller set to

1 pulse / sec (Hz)

12 < 2

NOTE: This data applies to all EMIT Non-Air Assisted Ion Bars. Values will vary with the environment and particular applications.

Ion Bar Controllers

Figure 4. EMIT 50940 Controller with Recessed Potentiometer Adjustment

Figure 6. EMIT 50855 Controller with Digital Adjustment

Controller Specifications

ITEMS 50940, 50941

  • Weight: 1.9 lbs
  • Cable: 4′ Length
  • Operating Voltage: 120VAC 50/60 Hz (50940) 220 VAC 50/60 Hz (50941)
  • Power Consumption: 30 W
  • Dimensions: 5.7″ L x 5.1″ W x 1.7″ H

ITEMS 50855, 50856

  • Weight: 1.6 lbs
  • Operating Voltage: 120VAC 50/60 Hz (50855)
    • 24VDC Power Adapter
    • 220 VAC 50/60 Hz (50856)
    • 24VDC Power Adapter
  • Dimensions: 4.9″ L x 5.7″ W x 1.7″ H


50940, 50941 50855, 50856
Remote Control No Yes
Input Power 120 / 220VAC 24VDC
Ionization Pulse DC Pulse DC

Potentiometer Adjustment


Digital Adjustment and


Period Potentiometer Adjustment from

0.05 sec to 1 sec.

Digital Adjustment Increments from 0.1 sec to 10 sec.


“All ionization devices will require periodic maintenance for proper operation. Maintenance intervals for ionizers vary widely depending on the type of ionization equipment and use environment. Critical clean roomuses will generally require more frequent attention. It is important to set-up a routine schedule for ionizer service. Routine service is typically required to meet quality audit requirements.” (ESD Handbook ESD TR20.20 section Maintenance / Cleaning) Compliance Verification per ANSI/ESD S20.20 is to be per ESD TR53 using a Charged Plate Monitor or a SP3.3 Ionization Test Kit. Specifications and procedures subject to change without notice.

Limited Warranty, Warranty Exclusions, Limit of Liability and RMA Request Instructions
See the EMIT Warranty –

EMIT – 3651 Walnut Avenue, Chino, CA 91710 • (909) 664-9980 • Website:

Documents / Resources

EMIT 50900 Non-Air Assisted Ion Bar System [pdf] Instruction Manual
50900 Non-Air Assisted Ion Bar System, 50900, Non-Air Assisted Ion Bar System, Assisted Ion Bar System, Ion Bar System, Bar System


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