• Optional calibration.
• Successful calibration indicator.
• Standby function.
• Low battery alarm.
• Fully waterproof.

Product description ------------------- The Bluelab Conductivity Pen simply tells you that your s have the right a of ent in your solution and lets you know if adjustments are needed. To feed s well, we need to know what we're feeding them. Start with a quality ent. Measuring the conductivity every day is the best way to avoid over-diluting or over-concentrating your ent solution. Completely change the reservoir solution every 7 days. Top up the ent level between changes - so your s always have the right a of food. The Bluelab Conductivity Pen also measures the temperature of the solution, as root is vital to the success of a crop. Temperature affects the growth rate and structure of a so a solution temperature of 18 - 22?C or 65 - 72?F is recommended. To make sure the s can get at the food, you need to measure the pH of the solution. Check out our handy Bluelab pH Pen so you have every tool required to manage your ent solution. Features Measures conductivity and temperature Selectable units for conductivity and temperature Backlit LCD display Calibration optional Successful EC or ppm calibration indicator Hold reading function Low battery indicator Fully waterproof Auto off function Automatic temperature compensation 1 x AAA alkaline battery included Legal Discler ---------------- SEE OUR FEEDBACK TO BUY WITH CONFIDENCE. EVERYTHING WE SEND OUT IS IN PLAIN PACKAGING..! For UK we accept PayPal, money orders, personal cheque, bank transfers or credit cards. Money orders, cheque or cash sent must include a reference or eBay username plus the item number, Postal orders and cash must be sent recorded delivery as we cannot take responsibility for lost money. Alternatively you are more than welcome to collect your order from our premises in cambridge and browse our shop which stocks over 1000 products. Delivery times: Please see our feedback for customer’s comments on speed of delivery. We carry a huge stock level and most courier orders placed before 4 pm are received the next day. For multiple items please click on ‘Request total from seller’ on the payment page. You will be charged the highest postage cost for 1 item then £1 for each additional item. You will not pay more than £10 delivery (ex. heavy items i.e. soils, lights etc.) Items less than 2kg in weight can be sent throughout the UK and N.Ireland at our standard postal rates by Royal Mail Items over 2kg are sent by courier where a delivery surcharge applies to: Highlands & Isle of Wight: Before 16:00 only £16 up to 20kgs in weight for post codes: AB37-38,41-45,51,56, FK19-21, IV1-28,30-37,40,54,63 KW1-3,5-14, PA21-40, PH15-26,30-41,49,50,TD, PO30-41 Scottish Offshore Islands: Two Day Only £20 up to 20kgs in weight for post codes: HS1-9, IV41-56, KA27-28, KW15-17, PA20,40-49,60-78, PH42-44, ZE1-3 Northern Ireland £25 up to 10kg in weight, £1.25 per kilo thereafter Republic of Ireland £35 up to 5 kilos in weight, £2.75 per kilo thereafter Offshore British mainland please message for a quote And if you are unsure about the weight of your order please message first for a quote