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Catalogue: Section 7: Environmental Controls

Meters

There are several meters available on the market. The meters listed have been specially selected because of their reliability.

When using NFT, Flood And Drain and Rockwool slab culture, growers can control and manage the pH and strength (conductivity or CF) of the nutrients and ensure fast growth rates and greater yields.

ETI/TI pH and CF meters.

Pocket type meter. Accurate to +/- 0.2 pH. These are very reliable pocket type meters. All pH meters, including the ETI pH meter are delicate and should be handled with care. Meters are tested at the shop at time of purchase, and come with a 90 day warranty. Ph meters should last from six months to a year.

E1 - ETI/TI EC/CF Meter 55 - Quantity: 
E2 - ETI/TI pH Meter 55 - Quantity: 
 

 

Milwaukee Sharp EC/CF and pH meters.

Fully waterproof pocket type meter. Accurate to +/- 0.2 pH. These are reliable pocket type meters. All pH meters, are delicate and should be handled with care. Meters are tested at the shop at time of purchase, and come with a 90 day warranty. These meters should last up to a year.

E3 - EC/CF Meter, Fully Water Proof 65 - Quantity: 
E4 - pH Meter, Fully Water Proof 65 - Quantity: 
 

 

Hanna Grocheck EC/CF and pH meters.

On line monitoring system that uses a probe in your tank for constant reading. The unit is temperate compensated. Accuracy of +/-2% at room temperature (25°C). The LED flashes when the pH or CF is not within acceptable parameters. Less calibration is required compared to standard meters, as the probe is constantly submerged during use.

E5 - Hanna Growth Check EC/CF constant reading meter 85 - Quantity: 
E6 - Hanna Growth Check pH constant reading meter 85 - Quantity: 
 

 

New Zealand professional EC/CF and pH meters.

These CF and pH meters are extremely robust and of a high calibre and come highly recommended. These conductivity (CF) meters and pH meters are used for testing the strength of nutrient solutions. These high quality instruments are designed to withstand the rigours of any growing environment. Both meters feature automatic on / off and automatic temperature control and is accurate to +/- 0.1. These meters require no calibration, come with battery and has a two year guarantee.

E7 - New Zealand EC/CF Professional Truncheon 90 - Quantity: 
E8 - New Zealand pH Professional Wand 150 - Quantity: 
 

NutraWand Cf Truncheon

Give the NZ CF Truncheon a run for its money! Reliable, accurate and waterproof.

E91 - NutraWand Cf Truncheon £80 - Quantity: 
 

 

E9 - Min Max Thermometer (Analogue Dial) 10 - Quantity: 
E10 - Humidity Dial Hygrometer (Analogue Dial) 10 - Quantity: 
E50 - Infra Red Thermometer 55 - Quantity: 
 

 

This instrument digitally monitors the min / max temperature and humidity of the growroom. It has an extrernal probe that can measure the min / max temperature of the water tank and has a built in clock.

E11 - Digital Min Max Thermometer / Hygrometer And Water Temperature Probe With Clock 45 - Quantity: 
 

 

MicroPonic System

MicroPonic system.

This instrument automatically measures the CF of the nutrient reservior and will automatically add the correct amount of nutrient as and when it is required, thereby ensuring that the nutrient level is always at an optimum level for plant uptake.

E12 - MicroPonic automatic food doser 350 - Quantity: 
 

 

Environmental Units

Large and small vapourtek filters. Air filter. Silver Bullet ozone generator.

Vapourtek neutralises strong odours. However, it doesn't replace carbon filters in a growing environment, but can be useful in dealing with odours from adjoining rooms. There are two systems: one which uses a dry oil cartridge that releases into the atmosphere using a special fan which is housed in the Vapourtek systems. Each cartidge lasts at a minimum of 90-120 days before needing to be replaced. The small Vapourtek (round) is capable of servicing up to four lights and the large (cuboid) up to five lights and more. Each Vapourtek comes complete with a cartridge and is ready to plug in for immediate use.

The Silver Bullet Ozone Generator encourages plant growth. It also discourages insects but primilary dissolves odours. This is a tried and tested safe domestic appliance.

E13 - Vapourtek air purifier / neutraliser, two speed, round unit 95 - Quantity: 
E14 - Vapourtek air purifier / neutraliser cartridge pack of two 35 - Quantity: 
E15 - Vapourtek optimum 4000 air purifier / neutraliser, 10 speed, cuboid unit 225 - Quantity: 
E16 - Vapourtek air purifier / neutraliser replacement cartridge 65 - Quantity: 
E17 - F400 Ioniser 60 - Quantity: 
E41 - Ozone Generator 225 - Quantity: 
 

 

Cool and Warm Mist Humidifier

Cool and Warm Mist Humidifier

Cool and Warm Mist Humidifier. Automatic humidity control. Transparent water tank: 7 l. Easy maintenance. Alarm for water refilling& tank cleaning.

- Suitable for rooms up to 50 sq. m
- Cool and Warm Mist Humidifier
- Automatic humidity control
- Transparent water tank: 7 l
- Easy maintenance
- Alarm for water refilling& tank cleaning
- Spray control function
- Digital display
- Vibration prevention mechanism
- Safety lock
- Max spray: Cool mist : 400 cc/hr
- Warm mist : 550 cc/hr
- Air flow: 430 ml / hr
- Power: Cool mist 40W; Warm Mist: 140W
- Voltage: 220-240 V / 50 Hz

E62 - Cool and Warm Mist Humidifier £195 - Quantity: 
 

 

Oil Filled Radiators

Oil Filled Radiator

These thermostatically controlled radiators gently heat your grow room without the worry of stripping the environment of humidity or for that matter adding humidity. Will not dry out the plants or the atmosphere unlike fan or convection heaters currently available.

2kw - 9 radiator panel and 2.5kw - 11 radiator panel versions available with adjustable thermostat, 3 heat settings, power indicator, 24 hour timer built-in, castors, carry handle and overheat safety cut-out.

E96 - 2kw Oil Filled Radiator £70 - Quantity: 
E97 - 2.5kw Oil Filled Radiator £90 - Quantity: 
 

 

Vecton UV Steriliser - Destroys Pythium

Water heaters.

The use of Ultraviolet lamps to treat your hydroponic nutrient solution helps to control and can completely eliminate pythium where it has taken hold in a re-circulating hydroponic system. In a normal growing environment pythium tends not to occur however if it does occur it can decimate a crop in no time at all. To control and eradicate pythium from your system, simply connect the Vecton UV Steriliser to a pump and continuously pump your nutrient solution through this steriliser.

It is recommended that you also use UV balance as the steriliser can nock out some delicate food chains in your nutrient solution this is specially formulated to correct any potential imbalances that may occur from using a UV steriliser. The lamps in these units should be changed every 5-7 months. Full instructions included.

E58 - Vecton UV Steriliser 8 Watt (Treats 200 Litre Tank) £125 - Quantity: 
E59 - Vecton UV Steriliser 15 Watt (Treats 400 Litre Tank) £145 - Quantity: 
E60 - UV Balance 1 Litre £10 - Quantity: 
 

 

Ozoniser Water Steriliser

Ozoniser Water Steriliser

The sterilisation of ozone is 1.5 to 5 times greater than ultra violet light, three hundred to three thousand times faster than chlorine related products.

This ozonizer can produce a high standard of sanitary disinfection. The ozonizer has the function of killing germs, viruses, parasites and microbes. In addition, it brightens water, keeps it fresh, removes odours, colours and resolves poisonous harmful chemicals. The ozoniser is specifically curative for pythium (rot root), fungus gnat larvae, any tank dwelling pests, fungi, viruses and many other infections and diseases.

Two versions available:

Standard: Output 100 mg/h power consumption 7w.
Recommended airflow rate through the ozonizer 5 litres per minute. The ozonizer will treat up to 500 gallons at 1mg per 5 gallons.

Commercial: Output 2000 mg/h power consumption 60w.
Built-in air pump delivering 15 litres per minute. The ozonizer will treat up to 10,000 gallons at 1mg per 5 gallons.

E94 - Standard Ozoniser Water Steriliser £100 - Quantity: 
E95 - Commercial Ozoniser Water Steriliser £350 - Quantity: 
 

 

Water Chillers

Ozoniser Water Steriliser

Warm water becomes the definitive breeding ground for pythium (rot root), fungus gnat larvae, any tank dwelling pests, fungi, viruses and many other infections and diseases. Warm water also dramatically reduces oxygen content able to be carried in the water, ie the warmer the water, the less oxygen content in the water no matter if you are air infusing or dosing with h202; if the water is warm then you have no oxygen in it! Thereby, prohibiting the plants’ ability to perform. These nutrient solution chillers will maintain the correct optimum temperatures no matter how warm your tank currently gets.

Two versions available:

300: Will treat up to 300 litres tank volume. Flow rate 500-2000 litres per hour. 320w.

500: Will treat up to 500 litres tank volume. Flow rate 1200-3000 litres per hour. 480w.

E92 - 300 Water Chiller £500 - Quantity: 
E93 - 500 Water Chiller £600 - Quantity: 
 

 

Osmosis

In some parts of the UK, water quality is poor so it can be difficult to obtain optimum results expected from hydroponics. Reverse Osmosis (RO) is the answer. This is a water purifier which removes all unwanted residues and particles from your water - thereby giving the grower better quality water. These need to be ordered in advance so the exact model best suited to the type of water in the grower's area is supplied. However, chances are that most growers won't require one. If you are in any way unsure, please contact us, so that we can advise and order a unit for you.

E18 - Reverse osmosis & saddle clamp 295 - Quantity: 
 

 

Timers And Relays

Digital timer, mechanical timer and RCD circuit breaker. Two way contactor relay timer. Switch two high current items on a daily cycle. 18 way contactor relay timer. The hub of an expandable environmental system. Switches up to 1kW. 6000W contactor relay timer.

One of the most common and serious problems experienced by growers is hydroponic lighting timer failures. Household timers purchased from major manufacturers are simply not designed to handle the (inductive) power loads of hydroponic lighting. Contactor relays are the answer. You can still use the standard timer, but power is routed through the contactor relay and not the timer. Alternatively, we also offer relays that have built in timers. Timers will switch on your contactor and lights as and when required.

They are simple to use, as well as being very reliable. There's no wiring, just plug it in. Each contactor can handle up to 3 × 400W, 2 × 600W or 1 × 1000W lights. Four gang heavy duty timer contactors are also available which will switch up to 4 × 400W, 4 × 600W or 2 × 1000W lights. All timer contactors that we offer are sealed to IP65 rating ie, completely waterproof even when totally submerged in water.

Please note that some lighting ballasts have combined timers.

E19 - Contactor / Relay, 1.4kW, ie 2 × 600W lights (needs timer) 50 - Quantity: 
E20 - Sentinal 4 × 400W Controller 115 - Quantity: 
E21 - Ecotechnics 3KW Power Controller (needs timer) 80 - Quantity: 
E22 - Sentinal 4 × 1000W Controller 130 - Quantity: 
E61 - Octopus 6KW Relay and Timer 165 - Quantity: 
E23 - Relay and Timer, rated at 6KW 165 - Quantity: 
E24 - Sentinal Power Board, rated at 12kW, ie 18 × 600W lights 285 - Quantity: 
E25 - Digital timer, ideal for flood and drain or CO2 30 - Quantity: 
E26 - Analogue timer, ideal with a relay for use with lights 15 - Quantity: 
E27 - RCD Circuit Breaker (a life saver) 35 - Quantity: 
 

 

Heavy Duty 4 Gang 4 Metre Extension Lead

Heavy Duty 4 Gang 4 Metre Ext Lead

Four socket 4 metre extension lead with power neon light. Heavy duty thermoplastic rubber socket. Manufactured to BS 1363/A. Cable manufactured to BS 6500. 240V 13A.

E76 - Heavy Duty 4 Gang 4 Metre Ext Lead £20 - Quantity: 
 

 

Water And Air Pumps

Air pump. High pressure pump for high pressure drippers.

Air pumps aerate your system and enable faster growth. Esoteric Hydroponics offer air pumps that are silent and reliable. We also stock a large range of heat extraction fans, filters and ducting. There is a HydroGarden DataSheet for MaxiJet Pumps.

E28 - Maxi Jet Water Pump 250 (MJ250) 20 - Quantity: 
E29 - Maxi Jet Water Pump 500 (MJ500) 25 - Quantity: 
E30 - Maxi Jet Water Pump 1000 (MJ1000) 35 - Quantity: 
E31 - Ceramic Air Stone 5 - Quantity: 
E32 - Rena Air Pump 100 25 - Quantity: 
E33 - Rena Air Pump 200 35 - Quantity: 
E34 - Rena Air Pump 400 55 - Quantity: 
E44 - WaterCraft Pump suitable for high pressure dripper systems 95 - Quantity: 
 

 

Hailea Super Silent Metal Air Pumps

Air pump.

Super silent yet super powerful. Go on, treat your plant, you know they deserve it :)

E64 - Hailea Super Silent Metal Air Pump v20 20 litres/min £60 - Quantity: 
E65 - Hailea Super Silent Metal Air Pump v40 40 litres/min £70 - Quantity: 
E66 - Hailea Super Silent Metal Air Pump v60 60 litres/min £90 - Quantity: 
 

 

Jun Super Silent Metal Air Pumps

Air pump.

Super silent yet super powerful. Go on, treat your plant, you know they deserve it :)

E67 - Jun Super Silent Metal Air Pump 30 litres/min £70 - Quantity: 
E68 - Jun Super Silent Metal Air Pump 60 litres/min £90 - Quantity: 
 

 

Heavy Duty Air Compressors

Heavy Duty Air Compressor

They don’t come any more powerful than this! Supercharge your system with these and your plants will be very pleased with you in more ways than one :)

E69 - 25W Heavy Duty Air Compressor £50 - Quantity: 
E70 - 30W Heavy Duty Air Compressor £60 - Quantity: 
E71 - 48W Heavy Duty Air Compressor £70 - Quantity: 
E72 - 70W Heavy Duty Air Compressor £85 - Quantity: 
E73 - 160W Heavy Duty Air Compressor £100 - Quantity: 
E74 - 300W Heavy Duty Air Compressor £125 - Quantity: 
E75 - 450W Heavy Duty Air Compressor £140 - Quantity: 
 

 

Ario Aerator Aeration System

Ario Aerator

Supercharge you reservoir with one of these super silent, super powerful no maintenance aerators pumps. No air stones or tubing required. Oxygenation at its best.

E80 - Ario Aerator 1 50 litre Capacity £25 - Quantity: 
E81 - Ario Aerator 2 100 litre Capacity £30 - Quantity: 
E82 - Ario Aerator 3 150 litre Capacity £35 - Quantity: 
E83 - Ario Aerator 4 300 litre Capacity £40 - Quantity: 
 

 

Round Ring Air Stones

Round Ring Air Stones

Diffuses air over a greater surface area with these as used in our Super Charged Turbo Aerator systems.

E86 - 2 x Round Ring Air Stone 3” £5 - Quantity: 
E87 - 3 x Round Ring Air Stone 4” £10 - Quantity: 
E88 - 1 x Round Ring Air Stone 5” £5 - Quantity: 
 

 

Silicone Air Line Pipe

For joining the air pumps to the air stones.

E89 - Silicone Air Line Pipe 5 metres £5 - Quantity: 
E90 - Silicone Air Line Pipe 100 metres £50 - Quantity: 
 

 

Oxydator

Oxydator

The Oxydator produces oxygen through a specially developed ceramic catalyst in combination with H2O2 delivering 100% normal and activated oxygen in micro bubbles throughout your water tank. These oxygen bubbles detoxify any harmful particles keeping your tank clean, healthy and free from harmful pathogens, bacteria and cloudy residues. Supplied with H2O2.

E84 - Oxydator Small (not pictured) £35 - Quantity: 
E85 - Oxydator Large (pictured) £65 - Quantity: 
 

 

Dripper System Components

High pressure drippers. Sold in packs of five.

Make your own high pressure dripper systems. Intended to be used with the high pressure water pump (product code E44) and rockwool slabs.

E45 - High pressure drippers × 5 10 - Quantity: 
E46 - High pressure drip hosing, 2m 5 - Quantity: 
E45A - High pressure feed hosing, 5m £10 - Quantity: 
 

 

Water Heaters

Water heaters. Indestructible Water Heater Titanium Deluxe Thermostatically Controlled Water Heater

It is important to maintain the temperature of nutrient solution between 20-24°C as this will ensure better growth rates and is particularly important during the colder season.

E35 - Water Heater 25 - Quantity: 
E49 - Indestructible Water Heater 65 - Quantity: 
E77 - 200W Titanium Deluxe Thermostatically Controlled Water Heater £75 - Quantity: 
E78 - 300W Titanium Deluxe Thermostatically Controlled Water Heater £85 - Quantity: 
E79 - 500W Titanium Deluxe Thermostatically Controlled Water Heater £95 - Quantity: 
 

 

Autonomous Environmental Control Systems

Fan Controllers

Sunbeam thermostatic fan controller. Fan contoller. Controls inlet and outlets fans to ensure steady temperature.

The Sunbeam fan controller switches fans on when the room is too hot and switches fans off when the room is too cold. Intended for use with a simple inlet or extraction fan. Temperature is set with the single rotary dial.

The Prima Controller - combined fan speed controller and thermostat which controls exhaust and intake fans. This can be wired to fans, program your requirements and it will do the rest. The Prima Controller has three analogue dials:

This ensures continuous air flow, regardless of temperature differences. Further information is available from the DataSheet.

E43 - Sunbeam Fan Controller - thermostatic fan controller 95 - Quantity: 
E36 - Prima Fan Controller - controls inlet and outlet fans, has variable pitch control and thermostat override to control temperature of your grow room 150 - Quantity: 
E37 - Humidstat / thermostat fan controller - controls fans to turn on when temperature / humidity is too high 125 - Quantity: 
 

 

Ecotechnics Temperature Control Unit

Ecotechincs Temperature Control Unit

Temperature is one of the most important environmental factors in your grow room / glasshouse all plants have an optimum temperature at which they will grow at and a minimum and maximum temperature that they can survive therefore temperature is very important to the health & growth rate of all plants.

The Evolution digital temperature control System constantly monitors the temperature in the growing area and independently controls fans, heaters and humidity in order to optimise conditions for plant growth.

Plants grown in optimised environments grow much faster and bigger resulting in increased yields and decreased crop cycle times.

This Controller can be used in conjunction with the new Evolution Carbon Dioxide controller.

E63 - Ecotechnics Temperature Control Unit £250 - Quantity: 
 

 

Combined Environment Controllers

Harvest-Master 'Climate' Controller

I take the guesswork out of growing your plants and turning them into a crop. Just plug me in! I check what you have connected and how it works. You
hardly need to open the manual. I learn about everything, and keep on
learning about "atmosphere"; temperature, humidity and climate changes
minute by minute, day after day! That's my job!

Click here for lots more info

E51 - Harvest Master Climate Controller 745 - Quantity: 
E52 - Harvest Master Pro Climate Controller 1245 - Quantity: 
E53 - Harvest Master ProPlus Climate Controller 1545 - Quantity: 
E54 - Harvest Master CO2 Sensor upgrade for controllers 595 - Quantity: 
E55 - Harvest Master GSM Modem (for ProPlus model only) 595 - Quantity: 
E56 - Spare Harvest Master 240V 10 Amp Relay for controllers 95 - Quantity: 
E57 - Spare Harvest Master 3 Phase 32 Amp Relay for controllers 395 - Quantity: 
 


Seiobo combined digital environmental controller.

An all in one environmental controller. It features a thermostatic fan controller, a humidistat fan controller, a thermostatic heat controller and a CO2 monitor and injector. In short, you can control CO2, inlet and extraction fans, and heaters.

E42 - Seiobo Combined Digital Environmental Controller 475 - Quantity: 
 

The Shiva Controller is the ultimate in growing environment control and provides the indoor gardener with an easy to use and complete atmospheric solution by combining extraction and precise CO2 dosing. This is controlled by an infra-red monitor which is easy to install and operate. It even has a computer interface which enables the grower to customise and record environmental activity, and can even be controlled via the Internet. This system requires bottled CO2 (not supplied). To find out more, please visit for a full demonstration. An information sheet is available.

E38 - Shiva SES 130 Atmospheric Controller - comes with PC Terminal & Telaire 825 - Quantity: 
E39 - Shiva SES 130 Atmospheric Controller - comes with PC Terminal 500 - Quantity: 
 

 

Atmospheric Monitors

E40 - Telaire CO2 PPM Infra Red Monitor 500 - Quantity: 
 



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Catalogue: Kits | Systems | Lights | Nutrients | Grow Media | Fans & Filters | CO2 Release Systems | Environmental Controls | Miscellaneous | Pest Control | Literature

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Esoteric Hydroponics
8 Martyr Road
Guildford
Surrey
England
UK
GU1 4LF
UK Telephone: 01483 596484
International Telephone: +44 1483 596484
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International Fax: +44 1483 596490
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