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Automatic Rinse Tank Controls


Proper rinsing is one of the most important steps in quality manufacturing or metal finishing. Plenty of low cost, good quality water for rinsing has been available in the past, so rinse water conservation has been largely ignored.

Today, this is no longer true. Tap water costs have increased dramatically. Various new regulations are now in effect which limit the allowable volume of waste water. Others require waste water treatment. Still other laws tax the amount of water going down the sewer.

These factors have all encouraged many manufacturers and platers to invest in automatic rinse tank control systems. Many platers using automatic control systems for the first time are pleased to discover a reduction in water usage of up to 80%.

This water use reduction provides two major benefits:


The savings possible with Myron L® automatic Rinse Tank CONTROLSTIK Systems are illustrated in the following table. Figures are based on a 50% water reduction rate - the minimum that can usually be expected. Exact savings depend on several variables, including the type and frequency of work loads, rinse tank size and type of contaminant.

(Assuming 50% use reduction)

Monthly Water/Sewer Use (1 unit = 100 cu. ft.)
Note: 100 cu. ft. water is equivalent to 748 gallons

cost per unit
600 units
$ savings per
1000 units
 $ savings per
2000 units
$ savings per
5000 units
 $ savings per
. Month Year Month Year Month Year Month Year
$.70 $210.00 $2,520 $350 $4,200 $700 $8,400 $1,750 $21,000
$.90 $270 $3,240 $450 $5,400 $900 $10,800 $2,250 $27,000
$1.10 $330 $3,960 $550 $6,600 $1,00 $13,200 $2,750 $33,000
$1.30 $390 $4,680 $650 $7,800 $1,300 $15,600 $3,250 $39,000
$1.50 $450 $5,400 $750 $9,000 $1,500 $18,000 $3,750 $45,000
$1.70 $510 $6,120 $850 $10,200 $1,700 $20,400 $4,250 $51,000
$1.90 $570 $6,840 $950 $11,400 $1,900 $22,800 $4,750 $57,000
$2.10 $630 $7,560 $1,050 $12,600 $2,100 $25,200 $5,250 $63,000
$2.30 $690 $8,280 $1,150 $13,800 $2,300 $27,600 $5,750 $69,000
$2.50 $750 $9,000 $1,250 $15,000 $2,500 $30,000 $6,250 $75,000


The second major cost advantage of a CONTROLSTIK System: it reduces the investment required for waste treatment equipment. Because less water is handled, smaller capacity treatment/recovery systems can be used to meet government water pollution regulations.

Generally, rinse water contamination is caused by chemicals being "dragged in" and salts that are dissolved from work being rinsed. These solutions ionize and can be measured and controlled by Electrical Conductivity (EC). EC measures both the total dissolved solids and the non-solid (eg: acid) contaminants, thereby giving the most correct method of control. As water contamination increases, so does the conductivity; the automatic rinse tank controls operate on this principle. When conductivity reaches the value selected as a control point, the water valve
turns on to dilute the contamination. When the contaminants are reduced by dilution, the conductivity falls and the water valve turns off.

The unit of measurement for conductivity is the micromho (microsiemen); Myron L® systems are calibrated to this unit. All Myron L® Rinse Tank CONTROLSTIK Systems can be used in either normal tap water or in purified (DI) water tanks. The dual range sensor can be set on either the 5-500 or the 500-5000 micromhos range.

The two models available are briefly described below or see our CONTROLSTIK Systems page. All Myron L® CONTROLSTIK Systems consist of three components: Transformer Box, CONTROLSTIK Sensor, and Solenoid Valve.

Automatic Rinse Tank Models
Model Features
597  Reliable solid state electronics in a heavy-duty, NEMA 12 corrosion-resistant transformer box enclosure. Suitable for any plating
595 Same as 597, but with NEMA 3 box which can be surface or panel-mounted.
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