Purchase now: Pfannenberg 17218100000 FLZ 610 Hygrostat
Purchase now: Atlantech Drives provides you the Pfannenberg 17218100000 (Model: FLZ 610), a precision Mechanical Hygrostat designed to control enclosure heaters and filterfans based on Relative Humidity (RH). While temperature control is common, humidity is the silent killer of industrial electronics. The FLZ 610 detects moisture levels in the air and activates a heater to raise the temperature above the dew point preventing condensation on copper busbars and circuit boards.
Technical Specifications and Operation
The FLZ 610 features a user-adjustable range of 40% to 90% RH. It uses a high-quality polyamide band sensor that expands and contracts with humidity changes to actuate a snap-action changeover contact. This mechanical design means it requires no operating voltage to function (passive sensor), although it switches the active load (heater/fan). It is compatible with voltages from 24V up to 240V AC.
- Part Number: 17218100000.
- Model: FLZ 610.
- Control Range: 40 … 90 % Relative Humidity.
- Contact Type: Changeover (CO) Contact.
- Switching Capacity: 240 V AC / 5 A.
- Mounting: 35mm DIN Rail (EN 60715).
- Protection Rating: IP 20.
- Dimensions: Compact housing.
Expert Installation Advice: The 65% Rule
Setting a hygrostat correctly is critical. Expert Tip: We recommend setting the dial to 60% – 65% RH. If you set it too low (e.g., 40%), the heater will run constantly in many climates, wasting energy. If set too high (>80%), condensation may already form on cold surfaces before the heater triggers. A setting of 65% is the industry «sweet spot» for preventing corrosion without excessive energy consumption.
Frequently Asked Questions (FAQs)
Q: Does this device need a power supply?
A: No, the sensing element is mechanical. You only wire the live line through the contact to the heater. It acts like a switch.
Q: Where should I mount it?
A: Install it in the middle of the cabinet, away from the direct discharge of the heater. If placed right next to the heater, it will read «dry» air prematurely and turn off too soon.
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