GEMLink 5
AC Controller- Connection
- Runs the whole QLink range over RS-485
- Sizes
- Windows graphical interface; site, zone, range and panel views
- Best for
- The head end the whole QLink range reports to. Summary screens for demand irrigation, on/off heating and cooling devices, vents and anticipatory hot water, so the status of every growing condition is on one sortable, printable list. Version 5 adds demand irrigation and fertilizer control plus user-selectable time windows for minimum pipe temperature — that last one is where the energy saving is. Archived data recalls as graphs or tables
Catalog ↗QL-WS-4000 QLink Weather Station
AC Controller- Connection
- RS-485 to GEMLink; analog channels conditioned at test for a specific probe type
- Sizes
- Item QL-WS-4000 · 6×6 enclosure, blank cover · 4 analog sensor inputs, 2 digital inputs
- Best for
- The outdoor half of a QLink system — wind, rain and light feeding the vent and shade logic so the house acts on weather rather than only on inside temperature
Catalog ↗QL-SPC-4100 QLink Sensing Proportional Commander
AC Controller- Connection
- RS-485 to GEMLink; opens and closes vents and motors
- Sizes
- Item QL-SPC-4100 · 6×6 enclosure with four 5-position rotary switches on the cover
- Best for
- Drives vent and shade motors to a position rather than simply on or off. The rotary switches on the cover let a grower override a motor at the panel without going into the software
Catalog ↗QL-SPC-4400 QLink Sensing Proportional Analog Commander
AC Controller- Connection
- 0–10 VDC or 4–20 mA outputs
- Sizes
- Item QL-SPC-4400 · 6×6 enclosure with four 0–100% dials on the cover
- Best for
- The analog version — for equipment that takes a 0–10 V or 4–20 mA signal, such as variable-speed drives, modulating valves and proportional heating, instead of open/close contacts
Catalog ↗QL-SDC-4100 QLink Sensing Device Commander
AC Controller- Connection
- RS-485 to GEMLink; switches on/off devices
- Sizes
- Item QL-SDC-4100 · 6×6 enclosure with 8 toggle switches on the cover
- Best for
- Eight on/off loads — fans, pumps, heaters, lights — each with a manual toggle on the cover so a device can be run by hand during a fault or a service visit
Catalog ↗QL-STC-4100 QLink Sensing Timing Commander
AC Controller- Connection
- RS-485 to GEMLink; switches on/off valves
- Sizes
- Item QL-STC-4100 · 6×6 enclosure with 8 toggle switches on the cover
- Best for
- Eight irrigation valves on timed control from GEMLink, with the same cover toggles for manual operation. The valve-side counterpart to the SDC
Catalog ↗QL-BC-4100 QLink Boiler Controller
AC Controller- Connection
- RS-485 to GEMLink
- Sizes
- Item QL-BC-4100 · 6×6 enclosure with 8 toggle switches on the cover
- Best for
- Boiler and hot-water control tied into the same system as the vents, which is what makes GEMLink 5’s anticipatory hot-water and minimum-pipe-temperature windows work rather than fighting each other
Catalog ↗QL-FC-4100 QLink Fertilizer Controller
AC Controller- Connection
- RS-485 to GEMLink
- Sizes
- Item QL-FC-4100 · 6×6 enclosure with 8 toggle switches on the cover
- Best for
- Puts fertigation under the same controller as irrigation, so feed follows the demand-irrigation schedule instead of being dosed on a separate timer
Catalog ↗QL-AU-4501 QLink Alarm Unit
AC Controller- Connection
- RS-485 to GEMLink
- Sizes
- Item QL-AU-4501
- Best for
- The alarm node on the network — what tells somebody a house has gone out of range before the crop finds out
Catalog ↗QL-STC-4009 QLink MINIGator
AC Controller- Connection
- Single RS-485 cable to GEMLink; each relay automatic via GEMLink or manually on
- Sizes
- Item QL-STC-4009 · small enclosure, clear cover · 8 valve output relays + a 9th pump-start relay
- Best for
- Eight irrigation valves with a ninth relay that starts the pump whenever any valve opens — so the pump interlock is built in rather than wired separately. One RS-485 cable back to the head end. Equally at home in a greenhouse or on outdoor nursery beds
Catalog ↗QL-HSDC-4800 QLink HR8x8 Sensing Device Commander
AC Controller- Connection
- Voltage or current input signals and output relay lockout pairing set by onboard DIP switches
- Sizes
- Item QL-HSDC-4800 · 8×6 window enclosure · 8 sensor inputs and 8 relay outputs on board
- Best for
- The all-in-one "8×8" board for on/off devices — eight inputs and eight relays in one unit, made to panel-mount straight inside a relay control cabinet rather than hang as a separate box. Relay lockout pairing stops opposed equipment running against itself
Catalog ↗QL-HSTC-4800 QLink HR8x8 Sensing Timing Commander
AC Controller- Connection
- Voltage or current input signals selectable by onboard DIP switches
- Sizes
- Item QL-HSTC-4800 · 8×6 window enclosure · 8 sensor inputs and 8 relay outputs on board
- Best for
- The 8×8 board configured for irrigation valves — eight timed valve outputs with the sensor inputs on the same board, panel-mounted inside the control cabinet
Catalog ↗QL-HSPC-4800 QLink HR8x8 Sensing Proportional Commander
AC Controller- Connection
- Voltage or current input signals and relay lockout pairing via onboard DIP switches
- Sizes
- Item QL-HSPC-4800 · 8×6 window enclosure · 8 sensor inputs and 8 relay outputs on board
- Best for
- The 8×8 board for vents and shade motors. Lockout pairing matters here — it is what stops an open and a close relay being energised together
Catalog ↗QLink Sensors
AC Controller- Connection
- Pairs with any QLink series unit; readings feed through to GEMLink
- Sizes
- SEN-50Y-HFA temperature/humidity in high-flow aspirated housing · SEN-T1A-HFA air temperature aspirated · SEN-T1S soil temperature in 1.5" stainless tube · SEN-T1W-W1/2 water temperature in ½" well · SEN-WS/WD Davis wind speed & direction · SEN-PL-A and SEN-SL-A PAR and solar light by Apogee · SEN-PL-L and SEN-SL-L PAR and solar light by LICOR · SEN-R2-ARD1 Hortimax precipitation · SEN-R3-TB Davis tipping bucket rain
- Best for
- Eleven sensors covering light, rain, wind and the temperatures that matter — air, water and soil. The aspirated housings on the temperature and humidity sensors are the important detail: a sensor sitting in still air reads the sensor, not the crop
Catalog ↗