{"product_id":"bluelab-sample-tube-and-fittings","title":"Bluelab Sample Tube and Fittings – Inline Probe Holder","description":"\u003ch2\u003eKeep your controller's probes out of the tank and in the flow\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eBluelab Sample Tube and Fittings\u003c\/strong\u003e is a vertical probe housing that sits in a pumped loop from your reservoir, holding the \u003cstrong\u003epH, conductivity (EC) and temperature probes\u003c\/strong\u003e of a \u003cstrong\u003eBluelab Pro Controller Wi-Fi\u003c\/strong\u003e or \u003cstrong\u003eGuardian Monitor Wi-Fi\u003c\/strong\u003e in a steady stream of nutrient solution. The probes still read the solution directly, but they no longer hang in the tank: close the valves, drain the tube and lift them out for cleaning and calibration. Because the solution is piped to the tube, the reservoir itself can be awkward to reach or further away; only the tube has to sit within \u003cstrong\u003e2 m\u003c\/strong\u003e of the controller, the length of the probe cables.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSample Tube\u003c\/strong\u003e with conductivity, pH and temperature probe ports, inflow and outflow shut-off valves, and a drain valve that doubles as the manual sample tap\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHose fittings\u003c\/strong\u003e (1\" female thread to 1\/2\" hose tail), two\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature port plug\u003c\/strong\u003e for use when that port is empty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting clips\u003c\/strong\u003e with Pozidrive screws, two of each\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProbes in the flow, not the tank\u003c\/strong\u003e – solution passes them continuously for representative readings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree probe ports\u003c\/strong\u003e – EC, pH and temperature (temperature for the Pro Controller; a plug seals it for the Guardian)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIsolate and drain without opening the tank\u003c\/strong\u003e – shut-off valves and a drain valve make probe service quick and clean\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrain valve doubles as a sample tap\u003c\/strong\u003e – draw solution for a handheld meter check\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVertical design\u003c\/strong\u003e stops air bubbles and deposits collecting on the probe surfaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\" threaded ports or 1\/2\" (13 mm) hose fittings\u003c\/strong\u003e for straightforward plumbing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProbes Knocked, Fouled or Hard to Reach\u003c\/h3\u003e\u003cp\u003eProbes hung in a reservoir get knocked by hoses and pumps, sit in still corners and are a chore to fish out for their 30-day clean and calibration, so the job gets put off. A dirty or drifting probe then feeds the controller a false reading, and an automated system will dose pH and EC the wrong way with complete confidence, which shows up as \u003cstrong\u003enutrient lockout\u003c\/strong\u003e and \u003cstrong\u003epoor nutrient uptake\u003c\/strong\u003e. The Sample Tube keeps the probes protected in moving solution and turns maintenance into closing two valves and opening a drain.\u003c\/p\u003e\u003ch3\u003eHow to Use\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount\u003c\/strong\u003e the tube vertically within 2 m of the controller, with room above and below so hoses do not kink; fix the clips about 165 mm apart.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlumb\u003c\/strong\u003e a pumped line from the reservoir into the bottom inflow port and return the top outflow port to the tank, using the 1\" threads or the hose fittings; thread tape protects the PVC threads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoute\u003c\/strong\u003e the drain valve back to the reservoir or to a bucket on 13 mm hose.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit\u003c\/strong\u003e clean, calibrated probes: push each in fully, draw it back about 6 mm so the tip sits mid-flow, then hand-tighten the collar.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStart up\u003c\/strong\u003e with all valves closed, open the outflow fully and the inflow halfway, switch on the pump and check for leaks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEvery 30 days\u003c\/strong\u003e switch off the pump, close both ports, open the drain and remove the probes to clean and calibrate.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"hcs-specs\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible with:\u003c\/strong\u003e Bluelab Pro Controller Wi-Fi; Bluelab Guardian Monitor Wi-Fi (standard version)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProbe ports:\u003c\/strong\u003e conductivity (EC), pH, temperature (temperature used by the Pro Controller)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInflow and outflow:\u003c\/strong\u003e 1\" male tapered thread\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHose fittings:\u003c\/strong\u003e 2 x 1\" female thread to 1\/2\" male hose tail\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrain:\u003c\/strong\u003e valve with 13 mm (1\/2\") hose connection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum pressure:\u003c\/strong\u003e 15 psi (about 1 bar) – low-pressure systems only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e vertical; controller within 2 m (probe cable length)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e 2 clips, 2 Pozidrive screws\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRunning both a Pro Controller and a Guardian:\u003c\/strong\u003e two tubes, connected in series\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluelab part code:\u003c\/strong\u003e SAMTUB\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cdiv class=\"hcs-faq\"\u003e\n\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eDo I need a Sample Tube?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eNot if your probes can hang in the reservoir within 2 m of the controller. It earns its place when you want the probes out of the tank, protected and quick to service, or the reservoir is awkward to reach.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eCan one tube serve a Pro Controller and a Guardian Monitor?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eNo. Bluelab specify two tubes, with the outflow of the first connected to the inflow of the second.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eCan it run on mains water pressure?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eNo. It is built for a low-pressure reservoir pump loop and must not exceed 15 psi.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eWhich probes go in it?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eThe standard probes of your Pro Controller Wi-Fi or Guardian Monitor Wi-Fi: the pH probe, the conductivity probe and, on the Pro Controller, the temperature probe.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\u003ch3\u003eWorks Well With\u003c\/h3\u003e\u003cdiv class=\"hcs-related\" style=\"display:flex;flex-wrap:wrap;gap:10px;margin:12px 0 0;\"\u003e\n\u003ca href=\"\/products\/bluelab-pro-controller-wi-fi\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/nutrient-mangement-bluelab-pro-controller-wi-fi-72585741238645.webp?v=1785290983\u0026amp;width=160\" alt=\"Bluelab Pro Controller Wi-Fi\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eBluelab Pro Controller Wi-Fi\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eIts pH, EC and temperature probes fit the tube\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/products\/bluelab-guardian-monitor\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/Bluelab-Guardian-medium_landscape.jpg?v=1746905611\u0026amp;width=160\" alt=\"Bluelab Guardian Monitor (Wifi Version)\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eBluelab Guardian Monitor (Wifi Version)\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eMonitor probes can sit in the tube\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/products\/bluelab-guardian-monitor-spare-ph-probe-2m\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/bluelab-guardian-monitor-spare-ph-probe-2m-1.jpg?v=1790163794\u0026amp;width=160\" alt=\"Bluelab pH Probe\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eBluelab pH Probe\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eSpare pH probe for the pH port\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/products\/bluelab-temperature-probe\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/bluelab-temperature-probe-default-title-1.jpg?v=1790229366\u0026amp;width=160\" alt=\"Bluelab Temperature Probe\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eBluelab Temperature Probe\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eSpare probe for the temperature port\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":53929890578698,"sku":"NUT-BLUE-014-01","price":218.45,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/bluelab-sample-tube-and-fittings-default-title-1.jpg?v=1792261683","url":"https:\/\/hydrocropshop.co.uk\/products\/bluelab-sample-tube-and-fittings","provider":"Hydro Crop Shop","version":"1.0","type":"link"}