Custom Design of Humidifier Systems for a Potato Storage Facility

Custom Design of Humidifier Systems for a Potato Storage Facility

Potato Storage Facility

A client, with a potato storage facility, asked Smart Fog® to build and install a series of humidification systems. Thus far, the challenge for the client had been that their facility possessed inordinate levels of silica and lead in its atmosphere. Quickly, we realized that our ES100-2 system would offer the perfect, low maintenance solution to our client’s dilemma. Also, with its ability to dispense liquids at a controlled rate, our system would provide superior humidifier systems and disease control. Not only that, it will improve safety and increase the shelf-life and quality of stored foodstuffs


The Facility

The facility consisted of 6 different rooms totaling 9,600 square feet. The client required a maintained temperature of 72 degrees F with a relative humidity of 50%. Our ES100-2 humidification system is capable of humidifying up to 3,000 square feet up to 99% in any condition. Therefore, two ES100 units were needed for each room. Assembling each humidification system was meticulous, painstaking work, to say the least. Each system featues a CPLC10 controller, 3 ES100PB2, 6 S1 relative humidity sensors. Also, they have an INJ-1 Smart Fog® injection system, a Zero TDS 1000 water filter system, and a pipe and fittings kit. However, with our years of assembly experience, we came prepared.

The CPLC10 controller includes a special 6 zone program, plus injection. Furthermore, the PLC control comes with a full complement of utilities. These include 4 analog inputs, 7 transistor outputs, 2 lines x 16 characters,  and STN LCD, LED backlighting. Also, HMI displays, as well as, a 24 VDC power supply are included. Furthermore, the S1 sensor boasts a relative humidity range sensitivity of 0 to 100%. The temperature sensitivity ranges from -40 to 140 degrees F, an accuracy RH of +/- 1%. Also, it responds to any atmospheric changes within 15 seconds.



The ES100-2 humidification systems have the ability to produce up to 24 lb/hr of water and capable of working in temperature ranges of 50 F or more. Also, they provide the ideal means to reduce both the silica and lead levels in our client’s water supply. By doing so, our advanced humidification systems helped to further preserve the shelf-life and quality of their potato storage facility. For more information, please contact Smart Fog® today to get details on our full design and equipment services.



Potato Storage Facility Humidifier Systems Project Details


Product Description

Our ES100-2 humidification system was applied to a potato storage facility.
Room Size6 rooms x 9,600 square feet
Maintained Temperature 72˚F
Relative Humidity Required50%

CharacteristicsWater Filtration

  • Used because Water Has High Silica & Lead Levels

Components Used

– ES100-2H x 2 units for each room
– CPLC10 Control
– ES100 PB2 x 3
– S1 Relative Humidity Sensor x 6
– INJ-1 Smart Fog® Injection System
– ZeroTDS 1000 Water Filter System
– Pipe & Fittings Kit


Detailed Specifications

CPLC Controller Program included in this solution:  Special program for 6 zones plus injection.

PLC Control Specifications:

4 Analog inputs, 7 Transistor Outputs, 2 Lines x 16 characters, STN LCD, LED backlight HMI Displays, 24 VDC power supply.

Relative Humidity Range: 0 to 100% RH
Temperature Range: -40 to 140°F (-40 to 60°C)
Accuracy, RH: ±1 %
Accuracy, Temp Models with 4-20mA Temp.
Output: ±0.9°F @ 72°F (±0.3°C @ 25°C)
Accuracy, Temp Models with Passive Thermistor Temp Sensor: ±0.4°F @ 77°F  (±0.22°C @ 25°C)
Hysteresis, RH: ±1%
Repeatability, RH: ±0.1% typical

Temperature Limits: -40 to 140°F (-40 to 60°C)
Storage Temperature: -40 to 176°F (-40 to 80°C)
Compensated Temperature Range, RH: -4 to 140°F (-20 to 60°C)

4-20 mA Loop Powered Models:
Power Requirements: 10-35 VDC
Output Signal: 4-20 mA

0-10 V Output Models
Power Requirements: 15-35 VDC or 15 –29 VAC
Output Signal: 0-10 V @ 5 mA max

0-5 V Output Models:
Power Requirements: 10-35 VDC or 10–29 VAC.
Output Signal: 0-5 V @ 5 mA max

Response Time: 15 seconds

Electrical Connections: Removable screw terminal block
Drift: <1% RH/year
RH Sensor: Capacitance polymer
Temperature Sensor: 4-20 mA Output, Solid State Band Gap. Passive

Output: 10K @ 25°C Thermistor (Dwyer curve A)
Enclosure: ABS

Enclosure Rating: Designed to meet NEMA 3S (IP54)
Weight: 0.3 oz (8.5 g)
Agency Approvals: CE


Industry of Use

Potato Storage


Potato Storage Room Humidification Systems

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