• Marketleader in no-man-entry robots
  • Safest technology for cleaning in ATEX zone 0
  • Leading innovator in tank cleaning solutions

Robotic system for tank cleaning and storage tank maintenance

KOKS ESOT robotic system for tank cleaning

koks robotics products esot system for storage tank maintenance min

The KOKS ESOT-system is designed for heavy industrial applications and is suitable for no-man entry tank maintenance in order to eliminate the need for personnel to enter a hazardous environment. ESOT is the acronym for equipment set for oil tank cleaning. The ESOT-system is utilized in combination with a vacuum truck for discharging and transporting fluid and hazardous substances, such as liquids, sludge, fats, oils, fuels and chemicals. Specially developed for working with hazardous and contaminated substances, the robot is certified for ATEX (Ex) zone 0. The transportable, vented cabin (TVC) is available in an ATEX (Ex) zone 1 and zone 2 version and built in accordance with all applicable safety standards.

The KOKS ESOT-system enables its user to clean the ATEX zone 0 without a human entry of the ATEX zone 0 itself. Commonly used for the cleaning of black and white oil storage tanks, the health, safety environment and quality improvements are undeniable.

The powerful patented, abrasive, magnet tracks of the ATEX certified robot enable this versatile system to move with ease through the contaminated tank. From the vented cabin every movement of the robot can be controlled and seen on a HD television screen. The robot, which is connected to the vacuum truck, will enable large quantities of (fluid) substances to be processed in a short time and then be transported in accordance with current ASME/ ADR (CEOC) regulations. The user benefits from significant time savings and a huge reduction in cost.

The KOKS ESOT-robotic system can be fitted with various option kits that are appropriate for your needs and/or for industrial applications.

Need thorough advice?

We can imagine that you would like to know more about our products, the fields of application and our company. Make an appointment without obligation to get to know us and our extensive range of industrial cleaning machines.
We will be more than willing to tell you why thousands of professionals worldwide trust KOKS Group and KOKS equipment.

You can contact us by calling +31 (0)72 540 66 99, by emailing info@koks.com or by filling in the contact form via the link below. 


  • Cost saving.
  • Undeniable improvement for health, safety, environment and cleaning quality.
  • Easy control.
  • Ergonomic.
  • Built to the latest environmental and safety standards.
  • First robot being certified for ATEX zone 0.
  • No VOC in the ventilated cabin, providing safe conditions for the crew to operate without any need for additional protective gear.
  • Patented TVC cabin for ATEX zone 1 or 2.
  • Increase of operational efficiency.
  • Maximum grip on the floor by patented, abrasive, magnetic tracks.
  • Strong hydraulic power source.
  • Heavy duty hydraulically operated arm, creating 2,000 Nm in any direction.
  • Versatile robotic movements which enable it to move with ease through dense sludge.
  • Complete robot made of the highest grade of stainless steel, AISI 316 grade; material no. 1.4404.
  • Compact.
  • Easy set up.
  • Able to work continuously, 24/7.
koks robotics esot system control room benefits min
koks robotics esot system designed certified

Designed and certified for

  • a 20 ft container.
  • operation in ATEX zone 0, 1G, IIB, T4 (robot).
  • international protection class IP 66 (robotic system).
  • working in ATEX zone 1 or 2 environment (TVC-cabin).

Transportable vented cabin (TVC)

ATEX basic TVC ATEX zone 2 basic, Ex II 3G IIB T3. 
Ambient/storage temperature -20°C to 40°C/-20 to 50°C.
Max. wind force 6 Beaufort. 
Dimensions for transport (l x w x h) 6,058 x 2,591 x 2,438 mm (without suction chimney). 
Dimension at work (l x w x h) 6,058 x 2,438 x 6,910 mm (with suction chimney). 
Weight approx. 7,500 kg (incl. robot and all accessories). 
Amount / ventilated and conditioned rooms ​ 3/2.
ATEX fluorescent lighting in each room.
Supply voltage / rated current

3~400 V, TN-S, 50 Hz/40 A without residual current circuit breaker.

Max. / average power consumption with ADEX robot

11,5 / 7,5 kW.


EN 60079-0:2012+A11:2013, EN 50381:2004. 

DVR recording system for 4 camera feeds, 1 TB storage. 
Control system industrial computer enabling semiautomated cleaning program. 
Additional accessories full HD TV screen, 1,080 px, 32” (80 cm). 
  air conditioning and ventilation unit. 
  sensors for door, overpressure, air flow, fire emergencies.
  control panel for robot.
  steel safety plates to cover the windows during transport.


Hydraulic power pack

Hydraulic power unit


Pressure 70-100 bar.
Max. power supply 5 kW.
Aggregate connection            

3x 400 V 50 Hz.

Directive machinery directive 2006/42/EG, EN ISO 12100, EN ISO 614-1+A1, EN ISO 4413, EN 60204-1ED.2. 
Noise level (decibels) max. 80 dB(A). 
koks robotics cleaning robot hydraulic power pack min
koks robotics esot system tank cleaning robot adex min



ADEX robot.  


stainless steel AlSl 316 grade; material no. 1.4404.

Certification ATEX zone 0, 1G, IIB, T4.

EN 13463-1:2009; EN13463-3:2005; EN13463-5:2011; EN13463-6:2005; EN13463-8:2003. 

Max. range  100 m. 
Traction force  3,000 N, measured on Fe plate, thickness 10 mm, covered in oil. 
Speed ATEX zone 0 1-10 m/min. 
Operational depth ​ 250 mm. 
Ambient temperature -10°C to +50°C.
Tracks stainless steel, reinforced with magnets and patented abrasive tracks. 
Arm motion 35° in any direction. 
Arm force 2,000 N. 

Dimensions ESOT Robot

Length  approx. 1,800 mm
Width  approx. 545 mm
Height  approx. 400 mm
Height with elevated cameras approx. 900 mm
Manhole 24”/600 mm
Weight 420 kg



image transfer system


ATEX zone 0; ATEX directive 2014/34/EU, EMC.  

  Directive 2014/30/EU
Standards  EN 50303:2000, EN 60079-0:2012, EN 60079-11:2012, EN 60079-26:2007. 
Resolution  520 lines, analogue
Lights integrated LED lighting, max. 235 lux


suction arm broad head kae 01


Suction arm broad head

  • ideal for dry sludge types. 


  • stainless steel AlSl 316 grade; material no. 1.440.
suction arm trident head kae 02


Suction arm trident head

  • ideal for more dry sludge types that have hardened. 



  • stainless steel AlSl 316 grade; material no. 1.440.
suction head with wiper kae 03


Suction arm with wiper

  • for final cleaning of floor in product tanks (very fluid: diesel, kerosene etc).


  • stainless steel AlSl 316 grade; material no. 1.440.


  • small version.


  • large version
fluidizing suction head kae 04


Fluidizing suction head

  • with inlet for fluidizing product.
  • enables better passage of product through the suction hose, prevents sticking and clotting.

Connection (adaptable)

  • for inserting fluid, via a nozzle built-in inside the suction head.


  • stainless steel AlSl 316 grade; material no. 1.440.
standard suction head kae 05


Standard suction head

  •  elbow model, incl. add on bikini.


  • stainless steel AlSl 316 grade; material no. 1.440.
suction tip kae 06


Suction tip

  • for various product classes/qualities.


  • stainless steel AlSl 316 grade; material no. 1.440.


  • for KAE•05 standard suction arm (exchangeable).
  • add on model bikini.


  • add on model teeth.


  •  add on model straight.
abrasive magnetic stainless steel track plates kae 07


Abrasive, magnetic stainless steel track plates

  • 84 pieces of individual plates.
  • built-in neodymium magnets.
  • patented abrasive surface.


  • stainless steel AlSl 316 grade; material no. 1.440.
magnetic stainless steel track plates kae 08


Magnetic stainless steel track plates

  • 84 pieces of individual plates.
  • built-in neodymium magnets.
  • bare metal surface – for tank protection.


  • stainless steel AlSl 316 grade; material no. 1.440.
rubberized magnetic stainless steel track plates kae 09


Rubberized, magnetic stainless steel track plates

  • 84 pieces of individual plates.
  • built-in neodymium magnets.
  • rubber surface – for movement on concrete, outside the tank


  • stainless steel AlSl 316 grade; material no. 1.440.
lighting structure kae 10


Lighting structure

  • reinforced steel structure.
  • additional three-way light fixture certified for ATEX zone 0.
  • to be installed on the robot (forward, front and areal floodlights).
  • requires man entry inside the tank for mounting.
comfort control chair kae 11


Comfort control chair

  • in the TVC cabin. 


  • rotary base.
  • joystick controls.
  • emergency stop button.
  • mechanical suspension.
  • 100 mm vertical suspension stroke (4”).
  • automatic adjustment for driver, weight 50-120 kg (110-265 lb).
  • 60 mm seat height and tilt adjustment.
  • backrest angle adjustment.
  • fore-aft adjustment - 160 mm (6¼”).
  • suspension cover.
manhole camera kae 12


Manhole camera

  • camera for tank entry point and mechanical turner.
  • mounted either in the flange entry or any point as desired.
  • allows the operator to gain situational overview of the position of the robot inside the tank.


  • image transfer system.


  • ATEX zone 0, – ATEX directive 2014/34/EU, EMC directive 2014/30/EU.


  • EN 50303:2000, EN 60079-0:2012, EN 60079-11:2012, EN 60079-26:2007.


  • 520 lines, analogue.


  • integrated LED lighting, max. 235 lux.
dummy manhole kae 13


Dummy manhole

  • dummy manhole flange.
  • mountable on different surfaces.
  • for operator training and practice in for instance a workshop.
arctic package for hydraulics kae 14


Arctic package for hydraulics

  • additional heating of hydraulic oil for hydraulic power pack (winter time).
wireless remote control kae 15


Wireless remote control

  • ATEX zone 0 certified for use outside of tank, for easier robot manipulation.
  • operator module 433 Mhz premium.
  • 2 joysticks.
  • plug-in battery.
  • from 1 to 2 selectors between joysticks.
  • transceiver 12+3 relay, 433 Mhz premium, 115-230 Vac.
  • additional card (2 logical input + 1 analog input + 1 analog output + RS485 Modbus).
  • cable gland M32 + M25 sealing plug.
  • SIM card radio build with USB cable.
  • charger for PWB and PYB plug-in battery.
  • supplementary ATEX IECEx plug-in battery 3.7 V, 1,900 mA lithium Ion.
premium tvc cabin atex zone 1 kae 16


Premium TVC cabin ATEX zone 1

  • conversion of the premium TVC cabin.
  • conversion requires additional production lead time (ca. 1 month) because of more difficult procurement of zone 1 certified components; causing additional production costs.

Premium TVC

  • Atex zone 1 Premium, Ex II 2G IIB T3.
operator training kae 17


Operator training

  • by KOKS Academy and/or KOKS Robotics.
  • travelling and accomodation expenses of the training staff to be covered by the customer.
suction attachment with high pressure water jetting feature kae 18


Suction attachment with high pressure water jetting feature

  • NON-ATEX application!
  • ONLY for use in final cleaning in ventilated areas (no potentional explosion hazard)!
  • external high pressure water source required (couplings based on customer specification, to comply with their system).


  • stainless steel AlSl 316 grade; material no. 1.440.


  • nozzle beam with 3 high-pressure nozzles.

Adjustable position

  • horizontal for floor cleaning.
  • vertical for wall cleaning up to 1.5 m (with raised arm).
  • spray beam angle of 45° (manually adjustable).
additional power socket in storage room kae 19


Additional power socket in storage room

  • certified for ATEX zone 0.
  • for connection/use of other electric ATEX appliances in the zone.
  • 230 V.
entry bridge kae 20


Entry bridge

  • for easy entry into the tank manhole with the robot.
  • developed for a 24”/600 mm opening.
auger kae 21



  • to disrupt the tank content. 
koks robotics manual distributor with pedestal kae 22


Manual distributor with pedestal

  • in order to keep a clear view of the robot. 

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KOKS Robotics, formerly known as ADROC Tech s.r.o., is market leader and manufacturer of innovative no-man-entry tank cleaning robotics for ATEX zone 0. KOKS Robotics is part of the Dutch company KOKS Group an international manufacturer and supplier of vacuum trucks and heavy industrial cleaning equipment, built in accordance with the latest PED, ADR (Ceoc), DOT 407/412 standards. Founded in 1989 and has since grown into a dynamic company that operates globally and consists of eight specialised subsidiaries in the USA, The Netherlands, the Czech Republic, Saudi Arabia, Slovakia and participations in rental organizations that operate in the Netherlands and the United Kingdom. As a growing, innovative and reliable company, KOKS Group has gained an excellent reputation in the (petro)chemical sector and other industries as a vacuum truck builder.

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