1099™ Chemical Process Controller

Model 1099 Chemical Process Controller


  • Designed to provide accurate scale weights and automated use reports in water and wastewater treatment
  • 20 Button keypad interface
  • High accuracy of ±0.1 to ±0.25% of capacity
  • Alphanumeric LCD and numeric LED display with easy readability to 0.1 lb. (kg)
  • Readout in pounds, kilograms, gallons or liters
  • 4-20 mA outputs and optional set point relays
  • For use with Scaletron Cylinder, Ton Cylinder, Drum, Tank, Platform, IBC Tote and Spill Containment Scale Bases

Request Quote


Scaletron 5 Year Warranty on All Scale Products

Advanced Digital Scale Controller Offers Up to 4 Channels with Keypad Input

The Model 1099 Chemical Process Controller is central to Scaletron’s “Total Electronic System” which provides more accurate scale weights and automated use reports of chemicals used in the treatment of municipal drinking and industrial water, as well as municipal and industrial wastewater treatment.

The Model 1099 used in conjunction with Scaletron’s electronic base scales will reduce or eliminate most of the problems associated with the use of water and wastewater treatment chemicals such as: under dosing, over dosing, need for round-the-clock monitoring, accurate record keeping requirements, worker safety, environmental concerns, and equipment deterioration due to a highly corrosive environment.

The Model 1099 provides a way of assisting the operator in the batching process of chemicals used to prepare day-tanks, such as pumping several chemicals into a tank mounted on a scale base and mixing them together prior to dosing the desired chemical solution into the water system. Four adjustable high or low alarm levels with NO/NC relay contact closures are provided.

Our Model 1099 can operate 4 scales with 4 individual channels. It will monitor up to 4 groups of scales with each group using one channel for a total of 16 load cells. It is also capable of operating different types of scales (drum, platform, ton) used in the same system provided that the number of load cells does not exceed 16.

The Model 1099 will send all reporting information to a printer, recorder, or scada system and can provide permanent records of daily usage, amount used, days till empty, and the feed rate of four different scale bases, thereby preventing the system from running out of chemicals when the plant is unmanned. Set-point relays to control transfer and metering pumps can prevent over filling or under filling of day tanks. The unit can automatically regulate chemicals going into a tank, which is generally a safer and more accurate mode of operation. This reduces worker exposure and possible contact with chemicals.

Standard Features

  • NEMA 4X, UL approved enclosure to provide protection from acids
  • One to four independent channels
  • Two displays: Large LED display (.56″ high) to show numeric result; 2 line, 16 character LCD display, backlit for easy reading to display menu and functions
  • Keyboard is arranged with 20 keys: 10 function, and 10 numeric keys
  • Keyboard and display provide audible, tactile and visual confirmation
  • Ability to monitor up to 16 scales (load cells)
  • Capable of operating drum, platform and ton scales in the same system
  • 4-20mA Output signal on channel 1 – loop powered
  • Indicator can display the following data:
    • Gross weight – Total including container for each or all scales
    • Net weight – Of contents for each or all scales
    • Daily usage – Amount used during previous day
    • Amount used – Amount used since container was full
    • Days until empty – At current feed rate
    • Feed rate – Current rate in pounds, kilograms,gallons, or liters, with a range of 99,999 maximum reading
  • Nominal power ratings: 120/240 VAC, 50/60 Hz, 0.10/0.05A
  • Power and input/output cables are sealed with plastic strain relief


  • 4-20mA Output signal on channels 2 thru 4 – loop powered
  • Up to 4 set point relay contacts (high or low)
  • Audible alarm with adjustable volume
  • Remote mounting of indicator box up to 200 feet (61 meters) away from scale base