The Honeywell 5821 is a 2-zone temperature sensor or flood detector. Together with the T280R it will act as a temperature probe detector. And, together with the 470PB it will act as a flood detector. The 5821 sensor can be configured to operate as either a Temperature Sensor or Flood Detector. It can only do one selected function at a time plus cold sensing, yielding two simultaneous functions maximum. When either the external temperature probe or the water sensor is used, internal heat or warm sensing is disabled. Cold room sensing operation can be used in combination with any of the other operating modes.
The Honeywell T280R is a temperature probe intended for use with Honeywell 5821, T280 or TS300 sensors. The T280ZR probe is used to detect temperatures remotely from its main temperture sensor. The T280R features a resistance value of the probe at both extremes: -55C: 9,637,300 ohms. +25°C: 100,000 ohms. +50°C: 36,024 ohms. +150°C: 1,861 ohms. Accuracy: 0.2° C or 32.36°F.
To mount the T280R or TS300R, it can be extended for 15' up to 300' max. using shielded 24AWG or larger cable. Insure shield is grounded for noise immunity. Any other gauge wire at any distance longer than specified can cause unpredictable results. The only difference between the TS300R and T280R is that the TS300R comes with a mounting strap and screw to secure the probe in place and T280R does not.
Capable of monitoring cold (45°F) temperature and flood detection simultaneously. This transmitter operates on a 7-digit serial number and a loop number that must be programmed into a wireless zone in the control. When it senses a fault condition, it will send a fault signal to the control. Restores are handled depending on operating mode and current environmental conditions. Please keep in mind the T280R probe is water-resistant, meaning it will tolerate some water. Since, it is not waterproof, it cannot be submerged.
Five selectable temperature ranges to choose from (hot, warm, cold, refrigerate and freeze)
Up to 10 year battery life, which reduces user maintenance
Completely wireless, which greatly reduces installation time and maximizes placement options