Product Details
BF-D215B+ Differential Temperature Controller is mainly used in solar forced circulation,Hot water circulation, return water system control, etc.,Can detect the temperature difference between [high-temperature point T1] (e.g., collector) and [low-temperature point T2] (e.g., water tank),When the [temperature difference] reaches the user's preset value,Automatically activates the relay output to control loads such as the [circulation pump], circulating hot and cold media between high- and low-temperature points,Thereby reducing the temperature difference between the high- and low-temperature zones (referred to as the temperature differential).
The water tank temperature sensor probe is waterproof and can be immersed directly in high-temperature water for measurement.
Compact size and fast track mounting design.The switching power supply ensures stable, reliable, and continuous controller operation as the supply voltage varies between AC80V～240V.
Application Scenario 1: Solar Thermal Collection Thermal Difference Cycle Application
Controls the start/stop of the temperature-difference circulation pump to exchange hot and cold water between the collector and tank, gradually heating the tank water.
Scenario 2: Return water insulation system
control return water solenoid valve for pipeline antifreeze
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Product key features
Installation and features
1. Measures the temperature difference between two points and activates one relay output when the set positive differential is reached
2. Relay output normally open, normally closed point
3. Press F1 to independently view the temperatures at the high- and low-temperature points
4. Temperature values measured at high and low temperatures can be manually corrected
5. High-precision NTC 10K temperature sensor ensures stable and reliable measurement
6. Long-distance temperature sensor measurement (100 m) requires no compensation
7. Setting parameters Power off Permanent memory retention
8. Standard DIN rail mounting, compact size, easy installation
9. Powered by a switching power supply for stable operation at AC80-240V
Typical Product Applications
Product Technical Parameters
| Rated voltage | AC80～240V 50/60HZ |
| Power Consumption | 3 Watts |
| Ambient temperature | -10～55℃ |
| Ambient humidity | 35～85%RH |
| Display mode | Digital Module |
| Input | T1, T2 (NTC 10K Thermistors, B=3435K) |
| Measurement range | -50～150℃ |
| Measurement accuracy | 0.5FS% |
| Temperature Drift | ±0.3FS% |
| Control output | ON/off relay switch |
| Relay Contact Load Capacity | 1. Resistive load: 5A, 250VAC; supports equipment up to 1250W 2. Inductive load: 1A, 250VAC; supports equipment up to 150W 3. If the load current is >5 A (resistive) or >1 A (inductive), an AC contactor must be used for switching. |
| Extension wire | The sensor cable can be extended up to 100 m using wire |
| Power-off memory | Long-term memory retention function with power down setting parameters |
Product packaging, specifications and weight
| Appearance dimension (mm) | Length 91 × width 40 × height 52 mm |
| Installation Dimensions | Panel cutout mounting, cutout size 51 × 71 mm |
| Weight | Gross weight 184.5 g Net Weight 154.5g |
