VAISALA HMT335 Humidity Transmitter HMT330 Temp. 5L0B131DBAA100A0CAABAA1

( Brand: Vaisala ), ( Manufacturer Part Number: HMT335 ), ( Model: VAISALA HMT335 ), ( Type: Temperature And Humidity Sensors ), ( Country Of Origin: Finland )

Review VAISALA Humidity And Temp. Transmitter

The **Vaisala HMT335 and HMT330 Humidity Transmitters (Model 5L0B131DBAA100A0CAABA)** are precision-engineered, high-performance instruments designed to deliver accurate, reliable, and real-time humidity measurements in demanding industrial, environmental, and process control applications. Part of Vaisala s renowned HUMICAP sensor technology, these transmitters combine unmatched sensitivity, long-term stability, and robust construction to ensure consistent performance even in harsh or fluctuating conditions. The HMT335 and HMT330 are engineered to interface seamlessly with industrial automation systems, SCADA platforms, or standalone monitoring setups, providing analog or digital outputs (such as 4-20 mA, Modbus RTU, or Profibus) for effortless integration into existing infrastructure. With a wide measurement range spanning from **-40 C to 80 C** and **0% to 100% relative humidity (RH)**, these transmitters excel in applications requiring precise control of moisture levels, such as HVAC systems, pharmaceutical manufacturing, food processing, data centers, and laboratory environments. The HUMICAP polymer sensor technology ensures rapid response times, minimal hysteresis, and exceptional accuracy ( 2% RH over the full range), while the transmitters rugged, IP65-rated housing protects against dust, moisture, and mechanical stress, making them ideal for both indoor and outdoor deployments. Additionally, the units feature advanced self-diagnostic capabilities, including sensor health monitoring and automatic error detection, which enhance reliability and reduce maintenance requirements. Whether deployed in critical process control, environmental compliance monitoring, or energy-efficient climate regulation, the HMT335 and HMT330 deliver the precision and durability required to maintain optimal conditions with confidence.

### **Pros and Cons of buying a Vaisala HMT335/HMT330 Humidity Transmitter (5L0B131DBAA100A0CAAABA)**

#### **Pros**

1. **High Accuracy and Reliability**

The Vaisala HMT335/HMT330 series is known for its precision in measuring relative humidity, dew point, and temperature. It uses advanced capacitive polymer sensors, which are highly stable and resistant to contamination, ensuring long-term accuracy even in harsh environments.

2. **Wide Operating Range**

These transmitters are designed to function effectively across a broad range of conditions, including extreme temperatures (from -40 C to 80 C for the HMT335) and humidity levels (0% to 100% RH). This makes them suitable for industrial, environmental, and research applications where conditions may fluctuate significantly.

3. **Durability and Robust Construction**

The units are built to withstand challenging environments, including exposure to dust, vibration, and moisture (IP65/66 rating). The HMT335, in particular, is often used in outdoor or industrial settings where reliability is critical.

4. **Modular and Flexible Design**

The HMT335/HMT330 can be configured with various output options, including analog (4-20 mA), digital (Modbus RTU, Profibus, or Foundation Fieldbus), or Ethernet/IP. This flexibility allows integration into existing SCADA or automation systems with minimal hassle.

5. **Low Maintenance Requirements**

The capacitive sensor technology reduces the need for frequent recalibration or replacement compared to traditional mechanical hygrometers. The units are also resistant to common contaminants like oils and chemicals, further reducing maintenance needs.

6. **Compliance with Industry Standards**

Vaisala products are widely recognized and certified for use in industries such as pharmaceuticals, food and beverage, HVAC, and environmental monitoring. They meet standards like ISO, ASTM, and OEM specifications, ensuring compatibility with regulatory requirements.

7. **Long Lifespan**

With proper installation and maintenance, these transmitters can operate reliably for many years, often exceeding 10 years in service. This makes them a cost-effective investment in the long run.

8. **Remote Monitoring Capabilities**

The digital communication options (e.g., Modbus, Ethernet) enable real-time data logging and remote monitoring, which is valuable for predictive maintenance and process optimization.

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#### **Cons**

1. **High Initial Cost**

Vaisala s HMT335/HMT330 series is a premium product, and the upfront cost is significantly higher than that of basic or generic humidity transmitters. This may be a barrier for small businesses or budget-conscious projects.

2. **Complex Installation and Configuration**

Due to their advanced features and multiple communication protocols, these units may require specialized knowledge for proper installation, calibration, and integration into existing systems. Additional training or technical support may be needed.

3. **Limited Local Availability of Service**

Vaisala is a global brand, but authorized service centers or distributors may not be readily available in all regions. This could lead to longer wait times for repairs, calibration, or spare parts.

4. **Potential for Overkill in Simple Applications**

If you only need basic humidity monitoring (e.g., for a small lab or home use), the advanced features of the HMT335/HMT330 may be unnecessary. A simpler, lower-cost transmitter might suffice.

5. **Dependency on Vaisala s Support Ecosystem**

Since these are proprietary devices, users may become dependent on Vaisala s technical support, software updates, or firmware patches. This could pose challenges if Vaisala discontinues support for older models.

6. **Calibration and Recertification Costs**

While the sensors are durable, periodic calibration or recertification (as required by certain industries) can incur additional costs. This is less of an issue with basic hygrometers but should be factored into the total cost of ownership.

7. **Potential for Signal Noise in Analog Outputs**

If using the 4-20 mA analog output, users may need to account for noise filtering or shielding in long cable runs to ensure signal integrity, especially in industrial environments with electromagnetic interference.

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### **Conclusion**

The **Vaisala HMT335/HMT330 humidity transmitter** is a high-performance, reliable, and durable solution for professional and industrial applications where accuracy, longevity, and flexibility are critical. Its advanced features, compliance with industry standards, and low maintenance requirements make it a strong choice for environments like pharmaceutical manufacturing, environmental monitoring, or critical HVAC systems.

However, the **high cost, complexity of installation, and potential overkill for simple applications** may not justify the purchase for basic or cost-sensitive uses. If your application demands precision, long-term reliability, and seamless integration with automation systems, this transmitter is an excellent investment. For less demanding applications, a lower-cost alternative may be more practical.

### **Recommendation**

- You require **high accuracy and durability** in industrial, environmental, or research settings.

- Your system requires **multiple communication protocols** (Modbus, Profibus, Ethernet) or **remote monitoring**.

- Compliance with **strict industry standards** (e.g., pharmaceutical, food safety) is mandatory.

- You can justify the **higher upfront cost** with long-term operational benefits.

- Your budget is limited, and a **simpler, lower-cost transmitter** (e.g., generic capacitive sensors or mechanical hygrometers) will suffice.

- You lack **technical expertise** for installation and troubleshooting.

- The application is **non-critical** (e.g., home use, small-scale monitoring).

For most **industrial, scientific, or regulated environments**, the HMT335/HMT330 remains one of the best choices available due to its unmatched performance and reliability. Always verify compatibility with your specific system requirements before purchasing.

Details:

VAISALA HMT335 HMT330 Humidity Temp. Therefore, some signs of use or minor scratches on the surface are inevitable. However, these cosmetic flaws do not affect the products functionality. Transmitter 5L0B131DBAA100A0CAABAA1.

part #: hmt335 prices

• $393.00-$1350.00

specifications automationjack:

• brand: Vaisala
• mpn: Hmt335
• model: Vaisala Hmt335
• type: Temperature And Humidity Sensors
• country of origin: Finland

shipping automationjack:

• carrier: USPS, FedEx
• class: Standard, Economy
• cost: $11.23
• type: Calculated
• service: USPS Ground Advantage, FedEx Ground Economy
• transit: 5-11 Days

returns automationjack:

• method: Money back
• time: 30 Days
• paid by: Buyer
• policy: Returns Accepted

payments automationjack:

• wallet: Paypal
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• credit card: Diners-club

seller automationjack:

• rating: 99.7%
• # reviews: 1935
• city: Rancho Cucamonga, California

general automationjack:

• Business Industrial > Industrial Automation Motion Controls > Other Automation Equipment
• condition: Used

offer automationjack:

• options: Ship-to-home
• started: February 20, 2026
• quantity: 1
• sold: 0
• availability: In Stock
• best offers: True

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