Facebook Pixel
Sign-Up Bonus
Get 500 Reward Points instantly when you join.
Redeem Instantly
50 points = $1 off at checkout.
Earn as You Shop
$1 spent = 1 point every time you order.
Member Perks
Unlock exclusive member-only savings and offers.

Register and Earn 500 Reward Points
Toggle Nav
Search
Toggle Nav
Join Our Loyalty Program
main product photo

MAMAC Systems VA-921-VDC-8 Humidity Sensor

Rating:
5 5 9
9  Reviews Add Your Review
Special Price $177.83 Regular Price $204.50
In stock
SKU
VA-921-VDC-8

An essential part of HVAC systems that is integrated to detect humidity levels precisely is the MAMAC Systems VA-921-VDC-8 Humidity Sensor.. With its sensitive components and creative design, this sensor—which is installed within air handling units or temperature control systems—operates by sensing the amount of moisture in the air.The sensor detects variations in humidity and converts them into electrical signals, which are then transmitted to the HVAC system's control unit for further processing. The VA-921-VDC-8 guarantees precise and dependable humidity monitoring and management since it is specifically designed to interface with varied DC voltage inputs. HVAC systems can maintain ideal humidity levels thanks to their steady performance, which is essential for guaranteeing occupant comfort, halting the formation of mildew, and protecting delicate equipment.

Add to Wish List
HVAC Controls & Electrical, Control & Sensing Devices
Manufacturer:
https://www.partshnc.com/media/catalog/product/v/a/va-921-vdc-8.jpg

MAMAC Systems VA-921-VDC-8 Humidity Sensor

The  MAMAC Systems VA-921-VDC-8  is a high-performance humidity sensor designed for a variety of applications, including:

  • Humidification/dehumidification control: optimizes humidity levels in buildings to ensure comfort, prevent mold growth, and protect sensitive equipment.
  • Economizer control saves energy by automatically adjusting ventilation based on indoor and outdoor humidity levels.
  • Air handling units (AHUs): Provide accurate humidity readings for efficient air conditioning and heating operations.

Key features :

  • Ultra-fast response: cross-linked bulk polymer capacitive sensing element for accurate and instantaneous humidity readings.
  • Wide humidity range: Measures humidity levels from 0 to 100% RH with ±3% accuracy over 30 to 70% RH.
  • Temperature compensated: accurate readings over a wide temperature range (-30°F to 130°F).
  • Rugged construction: 20% glass-filled, low-smoke UL-95-V-0 polycarbonate enclosure for durability in harsh environments.
  • External mounting bracket: accommodates uneven mounting surfaces for easy installation.
  • NIST traceable calibration ensures accurate readings and complies with industry standards.
  • Two temperature-compensated output versions: For compatibility with various control systems, the 4-20 mA 2-wire or 0-10 VDC output is available.

Dimensions of the MAMAC Systems VA-921-VDC-8 Humidity Sensor:

  • Length: 4-6 inches
  • Width: 2–3 inches
  • Height: 1-2 inches
  • Weight: 0.17lbs/77.11g

Signs of a Faulty Humidity Sensor MAMAC Systems VA-921-VDC-8:

Several signs can indicate a potential issue with your MAMAC Systems VA-921-VDC-8 humidity sensor:

Inconsistent or inaccurate humidity readings:

  • This could manifest as your HVAC system constantly struggling to maintain the desired humidity level.
  • Unexpectedly high or low humidity readings even when the environment seems stable.
  • Inconsistencies between the sensor reading and other humidity monitoring devices in the same space.

Abnormal system behavior:

  • The HVAC system might frequently switch between heating and cooling modes, even with minimal changes in room temperature.
  • The economizer function might not activate or deactivate appropriately, resulting in inefficient energy use.
  • The humidification or dehumidification system might run excessively, leading to discomfort and potential damage to sensitive equipment.

Physical damage:

  • Visible cracks or breaks on the sensor housing.
  • Corrosion or rust on the sensor components.
  • Loose or damaged wiring connections.

Other potential signs:

  • Increased mold or mildew growth in your home or building.
  • Complaints of discomfort due to excessive humidity or dryness.
  • Unpleasant odors are associated with stagnant air or moisture buildup.
  • Increased energy bills as a result of inefficient HVAC operations.

It's important to note that some of these signs can also be caused by other issues with your HVAC system or building envelope. As a result, it is critical to consult a qualified technician to accurately diagnose the problem.

Choose the best HVAC equipment parts and supplies from PartsHnC!

  • Same Day Shipping

  • Best Quality And Best Price

  • Wide Range of Inventory

  • Best Customer Service

Have More Questions or Need Help to Place The Order?
Reach us at (866)773-0907 or [email protected]

FAQs 

Q: Where can I purchase the VA-921-VDC-8 MAMAC Systems Humidity Sensor?

  • Authorized MAMAC Systems dealers
  • Online retailers specializing in HVAC parts at partshnc.com
  • Some home improvement stores

Q: What are the applications for the VA-921-VDC-8 MAMAC Systems Humidity Sensor?

  • Commercial buildings
  • Residential homes
  • Industrial facilities
  • Data centers
  • Museums
  • Libraries
  • Greenhouses

Q: How do I troubleshoot a potentially faulty Humidity Sensor MAMAC Systems VA-921-VDC-8?

  • Compare sensor readings with those of other devices.
  • Check for error messages on your HVAC control system.
  • Inspect the sensor for physical damage.
  • Refer to the user manual for troubleshooting steps.
  • Consult a qualified HVAC technician for a professional diagnosis.
Reviews 9
Write Your Own Review
You're reviewing:MAMAC Systems VA-921-VDC-8 Humidity Sensor
Your Rating
Product Questions (2)
Customer Questions
What maintenance is required for the MAMAC Systems VA-921-VDC-8 Humidity Sensor?

Inspect the humidity sensor periodically for dust buildup and physical damage to ensure accurate readings. Verify wiring connections remain secure and free from corrosion. Clean the sensing element gently per manufacturer guidelines to maintain performance. Replace the sensor if readings become inconsistent or calibration cannot be maintained.

What are common issues with the MAMAC Systems VA-921-VDC-8 Humidity Sensor?

  • Inaccurate or fluctuating humidity readings.
  • Loose or corroded electrical connections.
  • Intermittent sensor operation.
  • Physical damage to the sensing element.

Installation Steps

Step1: Turn off power to the HVAC or control system before beginning.

Step2: Locate the existing sensor or designated mount point and remove the old unit if present.

Step3: Mount the new humidity sensor securely and connect wiring to matching terminals.

Step4: Restore power and verify the sensor reads humidity accurately in the system.