TrolMaster Hawkeye CM-1. Temperature, Humidity and CO2 Monitor

What the TrolMaster Hawkeye Measures This is a monitor rather than a controller, and that is the point of it. It reads temperature, humidity and carbon dioxide from one three in one sensor on a sixteen foot cable. Vapour pressure deficit is derived from the first two. Temperature covers 0 to 59 degrees Celsius to within two tenths of a degree. Humidity reads 5 to 95 percent to within seven percent. Carbon dioxide reads 0 to 2000 parts per million to within thirty parts per million. Three LED screens show the current values at a glance from across the room. Each parameter carries its own minimum and maximum setpoint, and an audible alarm sounds when a reading leaves that band. The alarm is on by default, which is the right way round for a monitor. Using a Climate Monitor for Records Rather Than Control The logging is the real reason to fit one. A MicroSD card up to 128 gigabytes slots into the unit, and it writes a record every fifteen seconds in plain text. That is a genuine audit trail rather than a graph you cannot export. Connect it to the network through a TrolMaster ethernet adapter or smartphone module and the app shows trends, history and alerts on a phone. Satellite services from HughesNet and Viasat will not carry it, which is worth knowing on a rural site. Power is 100 to 240 volts at 50 or 60 hertz, drawing up to 0.6 amps, with a 24 volt DC output. The carbon dioxide reading calibrates in about ninety seconds with the room at ambient. Fit the sensor at canopy height rather than beside the door, because a monitor recording the wrong place is worse than no record at all. Key Features Three Readings, One Sensor: Temperature, humidity and carbon dioxide arrive from a single probe on a sixteen foot cable. Vapour Pressure Deficit: VPD is derived from temperature and humidity, so the number you act on is on the screen. Per-Parameter Alarms: Each reading carries its own minimum and maximum, with the audible alarm enabled by default. MicroSD Logging: A card up to 128 gigabytes records every fifteen seconds in plain text you can open anywhere. App Access: With an ethernet adapter or smartphone module the app shows trends, history and alerts remotely. Three LED Screens: Current values stay readable from across the room without waking a phone to check them. Technical Specifications Specification Value Measures Temperature, humidity, CO2, derived VPD Temperature Range 0-59.0 C, accuracy +/-0.20 C Humidity Range 5-95% RH, accuracy +/-7% CO2 Range 0-2000 PPM, accuracy +/-30 PPM Sensor 3-in-1 probe on a 16 ft cable Data Logging MicroSD up to 128 GB, one record every 15 seconds, plain text Connectivity TrolMaster ethernet adapter or smartphone module; not compatible with HughesNet or Viasat Input Power 100-240 VAC, 50/60 Hz, max 0.6 A Output 24 VDC / 0.5 A Alarm Audible, on by default, per-parameter min and max Package Dimensions 275 x 165 x 70 mm In The Box Monitor and logger, 3-in-1 sensor, DC adapter