Fine bubble high performance air diffusers. Semi flexible diffuser construction 300cm long 32mm diameter. Maximum recommended air flowrate is 10 cubic metres of air per hour. Materials of construction are plastic with 316 stainless steel end fittings, aslo fitted with non return valve in diffuser. Diffuser contains its own internal fused silica bead ballast. End fittings are 1/2" acetyl plastic as standard.

The Dryden Air diffuser is the leading air diffuser used in UK aquaculture, treatment of leachate water on landfill sites, sewerage treatment and numerous other applications.
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AFM grade 1 filtration media

AFM (Advanced Filtration Media) grade 1 is the standard sized AFM media equivalent to 16 x 30 grade sand. M

Supplied in 25kg sacks, grade 1 particle size 0.5mm to 1.10mm. Media should be used on top of a layer of grade 2 AFM.

Price is per 25kg sack
(For bulk quantities and dealer prices please contact us directly at aqua@drydenaqua.com )
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Oxygen standard probe

High performance, very robust galvanic oxygen probe for the measurment of dissolved oxygen in water, waste water and air. Completely sealed internals, so there is no risk of insulation failure, heavy duty Sub Sea cable, high mv out-put 6.5 mv to approx 1mg/l dissolved oxygen. Ideal probe for the Dryden Aqua, AquaTraul system or your own oxygen monitors such as multichannel or stand-alone PLC based systems.

The probe is supplied with 5 meters of cable (alternative lengths available), pack of 5 membranes and 50ml of electrolyte.
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Ozone detector card

Ozone detector card, each card can take five measurements of ozone and five cards are supplied with the pack. The card will measure ozone levels in air from 10ppb to 105ppb, this is the important range over which human health, respiratory and allergic reactions may be initiated. The card is intended as an indicator to help protect the young, elderly, people with respiratory or allergic reactions as well as the active sports person that does not want to be exposed to pollution while enjoying excercise in towns or on the top of a mountain.

The card is also important as a personnel monitor in industry and in the office, where laser printers and photocopiers and other machines all produce ozone. The legal limit in the UK for 8 hour exposure is presently set at 100ppb, any level above this concentration is un-acceptable and illegal in the work-place.
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ET120 linear air blower

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standard float LR03 switch 10m cable

This is a standard general purpose low cost float switch. The cable is PVC. A pivot point weight can be added to the cable if required.

The float switch is rated for 240v ac 10 amp inductive load,

The float switch can switch small pumps on and off directly, however it possible it is always best to use a low control voltage which is used to activate a remote relay. The remote relay can then switch heavy loads such as pumps on or off.
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Aquaculture | Water Technology | Environmental Products.....delivered worldwide

Datalogging temperature meter

dry1 | Instrumentation, OxyGen monitors & water test kits | Datalogging temperature meter

Temperature datalogger

Ref: 8-4-12t

Price: £445.00 / €578.50 (Excluding VAT at 17.5%)

Temp datalogger (requires oxygen probe code 8.2.77t) is contained in an IP65 enclosure and will record 8000 oxygen readings at intervals from 8 seconds to 4 hours. The unit also has a set of volt free alarm relay contacts which can be used for control or alarm functions. The unit is programmed by a PC and the data is transferred to a PC using an infra red coms link. If your PC does not have an IR port, you can use an IR unit that plugs into the serial RS232 port.

The unit is simple, robust and very accurate. The unit is powered by 2 x AA batteries which last about 6 months to 1 year.

Termperature datalogger with modem

Ref: 8-4-122t

Price: £768.43 / €998.96 (Excluding VAT at 17.5%)

Temperature datalogger ( requires oxygen probe code 8.2.77t) is contained in an IP65 enclosure and will record 8000 oxygen readings at intervals from 8 seconds to 4 hours. Alarm levels can be programmed into the unit, and used to automatically activate a modem. You can also dial up the datalogger from a remote PC using a modem to down-load the data. The unit is prorgammed by a PC and the data is transferred to a PC using an infra red coms link. If your PC does not have an IR port, you can use an IR unit that plugs into the serial RS232 port.

The unit is simple, robust and very accurate. The unit is powered by 2 x AA batteries which last about 6 months to 1 year. The modem is powerd by the telephone line , only suitable for UK operation.

Teperature probe thermistor

Ref: 8.2.77t

Price: £56.00 / €72.80 (Excluding VAT at 17.5%)

The sensor is encased in a 8mm diameter stainless steel rod, and then filled with epoxy. The cable used is a urethane 6mm diameter with kevlar reinforcement. The probe is designed to be used under water at pressure up to 100m.

Infra red coms link

Ref: 8.4.121t

Price: £84.82 / €110.27 (Excluding VAT at 17.5%)

In order to communicate with the Oxygen datalogger you must use an infra red communications port on your PC. If your PC does not have an IR port, or if the the port is not compatible, then you can simply plug an adapter into the back of your pc or to the end of an RS232 cable.

dry1 > Instrumentation, OxyGen monitors & water test kits > Datalogging temperature meter

Prices shown are all ex-works Edinburgh Scotland