null
close
close
click to zoom in
  • Guaranteed Fitment

    Always the correct part

  • In-House Experts

    We know our products

  • Added Value

    Fast & Reliable

  • US & Canada Delivery

Testo 440 Air Velocity and IAQ Measuring Instrument with digital hot wire probe and digital vane probe, ø 3.9"

No reviews yet Write a Review
$1,323.28
SKU:
0563 4406
Availability:
1 to 2 Weeks2 to 3 Weeks
5 customers are viewing this product

Testo 440 Air Velocity and IAQ Measuring Instrument with digital hot wire probe and digital vane probe, ø 3.9"

$1,323.28

Testo 440 Air Velocity and IAQ Measuring Instrument with digital hot wire probe and digital vane probe, ø 3.9" is available at EquipTestPro.com with fast shipping and great prices.

Testo 440 Offers

Designed to be used in combination with high-quality probes to measure and store all air velocity and IAQ parameters, this instrument can connect to three probes simultaneously - a Bluetooth probe, a wired probe, and a temperature probe with a type K thermocouple connector.* Automatic probe detection and structured measurement menus make day-to-day tasks simple and easy to handle.

*All probes and attachments sold separately

Features

  • A measuring instrument for all climate-related parameters
  • Extendable with a wide range of probes
  • Wireless measurement with Bluetooth probes
  • USB interface for exporting measurement reports as CSV files
  • Intuitive measurement menu for volume flow and parallel determination of air velocity, humidity, and temperature in ventilation ducts or at air outlets
  • Graphic display with parallel display of 3 readings
  • Combine the vane probe (with Bluetooth) with the hot wire probe (with telescope) for ceiling outlets or the funnel set for plate outlets as required

Note: Please do not use the probe in condensing atmospheres. For continuous application in high-humidity ranges:

>80% RH at ≤86°F (30°C) for > 12 hours
>60% RH at >86°F (30°C) for > 12 hours

Measure in no time

Carry out your measurements quickly and easily. This multifunction instrument automatically detects each connected probe, so you won't need to manually reset measurement parameters when changing probes. Clearly structured measurement menus for measuring the volume flow in ducts and at outlets, funnel measurement, measuring the degree of turbulence, determining heating/cooling output, mold detection, and long-term measurement provide you with the optimal support for quick and efficient work.

A wireless space saver - more applications, less equipment

Endlessly versatile – the universal probe handle can be connected to all probe heads, so you can measure everything you need while saving money and space.

The Bluetooth probe handle makes it more convenient to carry out measurements and guarantees less cable clutter in your case. It makes it possible to carry out measurements without any bothersome cable connections and transfers readings up to a distance of 65'. If using a wireless connection is impossible, use the cable probe handle as a practical alternative.

Practical measurement data management

This instrument up to 7500 measurement protocols, which can be read via USB port and further processed as a CSV file on your computer (e.g. with Excel). With the testo Bluetooth / IrDA printer (sold separately), produce a printed report of measurement data directly on-site.

Intelligent calibration concept for maximum precision

Rely on the accuracy of your measurement results with this digital probe, because this instrument makes measurement uncertainty a thing of the past. You only need to send the probes in for calibration so the multifunction tool can remain in continuous use through numerous interchangeable probes.

Applications

  • Duct and outlet
  • Indoor air quality
  • Turbulence measurement
  • Cleanrooms
  • Laboratories

Convenience and maximum flexibility for duct and outlet measurements

With access to a large range of air velocity probes (sold separately), can carry out simple and convenient measurements even at locations that are difficult to access in ventilation ducts or at air outlets.

Find it easy to carry out measurements in particularly large ducts. This is because the extendable telescope on the hot wire and vane probe (Ø 16 mm) with universal handle can be further extended using the telescope extension - reaching a total length of 2 meters.

Carry out measurements at air/ceiling outlets effortlessly and without using a ladder. Fit a vane probe (Ø 100 mm) with the telescope with the 90° angle and, if necessary, with the telescope extension (both sold separately).

Greater freedom thanks to Bluetooth: the air velocity probes with Bluetooth have no inconvenient cable connection to the measuring instrument, and they transmit readings up to a distance of 20 m. Press the button on the probe to operate the measuring instrument - for example, to start and stop a series of measurements (timed mean calculation).

Attach this measuring instrument to metal surfaces (e.g. ducts) easily using practical magnets inside the instrument.

Benefit from fast calculation of the volume flow: in the 'volume flow' measurement menu of the multifunction measuring instrument, configure the dimensions and geometry of the duct cross-section - the measuring instrument shows you the volume flow straight away.

Long-term monitoring of indoor air quality

Poor indoor air quality due to excessive concentrations of CO2M/sub> can cause tiredness, lack of concentration, and even illness. With its menu for recording readings, this measuring instrument is ideal for monitoring indoor air quality. Enter the measurement time and the measuring cycle - and, for example, track the change in CO2 concentration or humidity and temperature values over the course of the day. Simply choose between probes with Bluetooth or fixed cable for CO2, CO, or humidity (probes sold separately).

Turbulence measurement in accordance with EN ISO 7730/ASHRAE 55

Determine the degree of turbulence and the draught risk in the workplace: draught restricts the comfort level and is the most common cause of complaints about the indoor climate. The turbulence probe (sold separately) measures air velocity and air temperature and automatically calculates the draught risk and the degree of turbulence per EN ISO 7730/ASHRAE 55.

For convenient measurements at varying heights, use the measuring tripod for comfort level measurement (sold separately). This makes it very easy to position turbulence probes in compliance with industry standards.

Range of probes for cleanrooms and laboratories

This measuring instrument is also ideal for a wide variety of applications in cleanrooms and laboratories in conjunction with the following probes:

  • High-precision flow measurement in fume cupboards with the fume cupboard probe
  • Thanks to the low start-up speed of 0.1 m/s, the high-precision vane probe (Ø 100 mm) is ideal for laminar flow measurements in cleanrooms. It is available as a variant with Bluetooth or with fixed cable
  • To measure the humidity in cleanrooms, use the high-precision humidity/temperature probe (0636 9771 or 0636 9772). With an accuracy of ±(0.6 % RH + 0.7% of mv) (0 to 90 % RH), it also meets the requirements for humidity measurements in this particularly sensitive area
  • Use the high-precision digital Pt100 temperature probes, for example, for high-precision comparative measurements in calibration laboratories, temperature measurements in chemical laboratories, or the cosmetics industry as well as for determining the temperature distribution in refrigerators and conditioning cabinets

Advantages of measuring with this meter

Precise and reliable in ducts and at air outlets

Large range of connectable probes: Hot wire and vane probe (Ø 0.6") for measurements in ducts, large vane probes (Ø 4") for measurements at air/ceiling outlets

Calculate volume flow quickly: In the measurement menu, simply configure the dimensions and geometry of the duct cross-section and see the volume flow displayed straight away

Easy to carry out measurements in larger ducts, due to the extendable telescope on the hot wire and vane probes (Ø 0.6"), up to a total length of about 6.5'

Carry out measurements at air/ceiling outlets effortlessly, without using a ladder - fit the vane probe (Ø 4") with the extendable telescope and 90° angle (both sold separately)

Use the vane probes in conjunction with the testovent measurement funnels and flow straighteners to test incoming / outgoing air at plate outlets, ventilation grills, and swirl outlets

Practical Bluetooth interface: Use the air velocity probes to measure without having to deal with any bothersome cables, operate the measuring instrument by pressing the button on the handle of the probe, e.g. to start or stop a timed mean calculation

Use the practical rear magnets to securely attach the multifunction measuring instrument to metal surfaces (e.g. ventilation ducts)

Long-term monitoring of indoor air quality

The right probe for your requirements: Probes for CO2, CO, and air temperature and humidity are available as wired or Bluetooth variants

Easy to use: Enter the measurement period and interval for long-term measurement, and track it over the course of the day

Internal memory for up to 7500 measurement protocols

Turbulence measurement in accordance with EN ISO 7730/ASHRAE 55

Attain a high level of accuracy, even at low air velocities, with a turbulence probe

Automatic calculation of draft risk and degree of turbulence in accordance with EN ISO 7730 / ASHRAE 55

For convenient measurements at varying heights, we recommend using our measuring tripod for comfort level measurement – this makes it easy to position turbulence probes in compliance with testing standards

Wide range of probes for laboratories and cleanrooms

Fume hood probe for high-precision air velocity measurements

Thanks to its low startup speed of 0.1 m/s, the available vane probe (Ø 4") is ideal for laminar flow measurements in cleanrooms, available as a wired or Bluetooth variant

High precision temperature/humidity probe (0636 9771 or 0636 9772) with an accuracy of ±0.6% RH + 0.7% of m.v. in the 0 to 90% RH range for measuring the humidity in cleanrooms



Testo 440 Specifications

Temperature (NTC)
Measuring Range -40 to 302°F (-40 to 150°C)
Accuracy ±0.7°F at -40 to -13.2°F (±0.4°C at -40 to -25.1°C)
±0.5°F at -13 to 166.8°F (±0.3°C at -25 to 74.9°C)
±0.7°F at 167 to 211.8°F (±0.4°C at 75 to 99.9°C)
±0.5 % of mv (remaining range)
Resolution 0.1°F (0.1°C)
Temperature (Type K TC)
Measuring Range -328 to 2498°F (-200 to 1370°C)
Accuracy ±(0.5°F + 0.3% of mv) [±(0.3°C + 0.3& of mv)]
Resolution 0.1°F (0.1°C)
General Specifications
Temperature Operating temperature: -4 to 122°F (-20 to 50°C)
Storage temperature: -4 to 122°F (-20 to 50°C)
Interface Bluetooth™
USB
Product Color Black/orange
Battery Type: 3 x AA 1.5 V
Lifetime: 12 hours (typically vane measurement)
Connectable Probes 1 x digital probe with cable

or

1 x temperature NTC TUC, 1 x digital bluetooth probe or testo smart probe, 1 x temperature tc type k
Dimensions 6.1 x 2.6 x 1.3" (154 x 65 x 32 mm)
Weight 8.8 oz (250 g)
Click here for complete specifications on the Testo 440

Shop EquipTestPro.com for the best deals on Testo 440 Air Velocity and IAQ Measuring Instrument with digital hot wire probe and digital vane probe, ø 3.9". Fast shipping, competitive pricing, and expert support. Visit equiptestpro.com today!

Shipping & Return Policy — EquipTestPro
Last Updated: February 1, 2026
Legal Policies

Shipping & Return Policy

Everything you need to know about orders, cancellations, refunds, and delivery.

🌎
Section 01
Shipping Destinations

EquipTestPro ships to both Canada and the United States. We are pleased to serve customers across North America with reliable, trackable delivery options.

Please Note: Certain products are subject to restrictions and cannot be shipped to all destinations. Product-specific shipping availability is noted on each item's detail page. We do not currently ship to international destinations outside of Canada and the United States.
💲
Section 02
Shipping Rates

When you place an order, a flat-rate shipping charge will be applied at checkout based on your order. The applicable rate will be clearly displayed before you complete your purchase.

Flat-rate shipping is calculated to reflect the cost of reliable, insured delivery. The rate shown at checkout is final — no hidden surcharges will be added after your order is placed.

⚖️
Section 03
Weight-Based Shipping

For certain items, shipping costs are calculated based on the weight of the product. The weight of any weight-based item is listed on its product detail page.

Rounding Policy: To align with the policies of our shipping carriers, all item weights are rounded up to the next full pound when calculating shipping costs.

For example, an item weighing 3.2 lbs will be rated at 4 lbs for shipping calculation purposes. This policy is standard practice across all major carriers we work with.

⚠️
Section 04
Product Restrictions

Some products sold on EquipTestPro are subject to shipping restrictions due to regulatory, carrier, or safety requirements. These include but may not be limited to:

  • Hazardous or regulated materials
  • Oversized or freight-class items
  • Products restricted by provincial or state import regulations
  • Items that cannot be air-shipped due to their composition

Where restrictions apply, this will be clearly noted on the product listing. If you have questions about a specific product's shipping eligibility to your location, please contact us before placing your order.

🕐
Section 05
Order Processing

Orders are processed on business days (Monday through Friday, excluding statutory holidays). Orders placed after business hours or on weekends will begin processing the following business day.

1
Order Confirmed You receive an email confirmation with your order details.
2
Order Processed Your order is verified and prepared for shipment (1–2 business days).
3
Shipped You receive a tracking number by email once your package is dispatched.
4
Delivered Delivery timelines vary by destination and carrier availability.
Section 01
Order Cancellation Rights

You are entitled to cancel your Order within 30 days of receipt without providing a reason, subject to the processing fee structure described below.

The cancellation deadline is 30 days from the date on which you received the Goods, or on which a third party appointed by you (other than the carrier) takes possession of the delivered product.

To exercise your cancellation right, notify us with a clear written statement by:

  • Email: info@equiptestpro.com
  • Online form: equiptestpro.com/contact-us
💳
Section 02
Cancellation Processing Fees

The following fee structure applies to all cancellations. Please review carefully before requesting a cancellation.

Customer-Initiated
10%

A processing fee of 10% of the total order value will be withheld from your refund to cover payment processing, handling, and administrative costs.

Company-Initiated (Item Unavailable)
$0

If we cancel your order due to item unavailability, no processing fee will be withheld. You receive a full refund of the amount paid.

Refunds will be issued using the same payment method as the original purchase. No additional fees beyond those described above will be applied.

Section 03
Conditions for Returns

To be eligible for a return, all of the following conditions must be met:

  • The Goods were purchased within the last 30 days
  • The Goods are in their original, undamaged packaging
  • The Goods are unused and unaltered from the condition received
  • A valid receipt or proof of purchase accompanies the return
Sale Items: Only regular-priced Goods are eligible for a refund. Items purchased on sale or at a discounted price cannot be refunded. This exclusion may not apply where prohibited by applicable law.

We reserve the right to refuse returns of any merchandise that does not meet the above conditions, at our sole discretion.

🚫
Section 04
Non-Returnable Goods

The following items are not eligible for return under any circumstances:

  • Goods made to your specifications or clearly personalized
  • Goods that by their nature are not suitable for return, deteriorate rapidly, or where the expiry date has passed
  • Goods not suitable for return due to health protection or hygiene reasons that have been unsealed after delivery
  • Goods that, after delivery, have become inseparably mixed with other items by their nature
  • Goods purchased on sale or at a promotional discount
📬
Section 05
How to Return Goods

You are responsible for the cost and risk of returning Goods to us. Before sending any items, please contact us at info@equiptestpro.com to obtain the return shipping address.

Important: We strongly recommend using an insured and trackable mail service. We cannot be held responsible for Goods damaged or lost during return shipment, and we are unable to issue a refund without confirmed receipt of the returned Goods or verifiable proof of delivery.
Section 06
Refund Timeline

You should expect to receive your refund within four (4) weeks of delivering your return package to the shipper. In many cases, refunds are processed sooner. The timeline breaks down as follows:

1
Transit to Us 5 to 10 business days for us to receive your return from the shipper.
2
Return Processing 3 to 5 business days to inspect and process your return once received.
3
Bank Processing 5 to 10 business days for your bank to post the refund to your account.

We will process refunds no later than 14 days from the day we receive the returned Goods, using the same payment method as your original purchase.

🎁
Section 07
Gift Returns

If the Goods were marked as a gift at the time of purchase and shipped directly to you, a gift credit equal to the return value (less any applicable processing fee) will be issued. Once the returned product is received and inspected, a gift certificate will be mailed to you.

If the Goods were not marked as a gift at purchase, or if the gift giver had the order shipped to themselves first, the refund will be issued to the original purchaser.

Questions? We're here to help.

Reach out to our support team for assistance with any order or return.

Not Applicable

Condition: NA

Frequently Asked Questions

  • How do I request a quote?
    To request a quote for pricing on any item found on our site, please click on our "REQUEST A QUOTE" link. Fill out and submit the form, one of our representatives will contact you when the quote is ready.
  • What payment options do I have?
    EquipTestPro accepts a variety of payment options for your convenience. For prepayment, we accept all major credit cards (MasterCard, Visa, Amex, Discover), Purchase Orders, and wire transfers.
  • How do I retturn items?
    All returns must be authorized. Items returned prior to authorization will not be accepted. For international customers where applicable, customers must ship any returns to us freight and duty prepaid. Return freight charges for internationsl shippments will be the responsibility of the customer.

    Defective new equipment may be returned for warrantyrepair/exchange to us within (5) days of the shipment receipt date. After five (5) days, returns will be handled by direct contact and in accordance with the warranty terms of the item's manufacturer. Items that have malfunctioned due to mishandling, electrical overload, etc., will be subject to repair charge.

    Non defective new equipment will be authorized for return within five (5) days of the shipment receipt date if the equipment is still in new, re-sellable condition with the original manual(s), accessories, packing material and carton. We reserve the right to reject returnsin which there is no original packaging, missing accessories, damage or visible signs of usage of the item. A restocking fee of up to 25% of purchase price may apply. Special orders and dangerous goods are non-returnable.

    (Do not write anytingon the manufacturer's original package or use as a shipping carton. Include all accessories, manuals and warranties.)

    Please, include a copy of the packing list or invoice with a reason for the return. Your return authorization number is valid for thirty (30) days.

Canada & US Shipping
Rewards Program
Secure Shopping
30-Day Free Returns