Skip to content

Global shipping available. Please request a quote to receive customized pricing for your region.

Hanna Instruments HI7640‑58 Optical DO Process Smart Probe Optical DO Process Smart Probe Hanna Instruments
Hanna Instruments HI7640‑58 Optical DO Process Smart Probe Optical DO Process Smart Probe Hanna Instruments
Hanna Instruments HI7640‑58 Optical DO Process Smart Probe Optical DO Process Smart Probe Hanna Instruments
Hanna Instruments HI7640‑58 Optical DO Process Smart Probe Optical DO Process Smart Probe Hanna Instruments
Hanna Instruments HI7640‑58 Optical DO Process Smart Probe Optical DO Process Smart Probe Hanna Instruments
Hanna Instruments HI7640‑58 Optical DO Process Smart Probe Optical DO Process Smart Probe Hanna Instruments

Hanna Instruments HI7640‑58 Optical DO Process Smart Probe

$1,944.99

    The HI7640‑58 Optical DO Smart Probe delivers fast, stable, and maintenance‑friendly dissolved oxygen measurements for demanding industrial process applications. When paired with a Hanna HI510 or HI520 controller, it provides highly accurate DO readings with automatic compensation for temperature, barometric pressure, and user‑set salinity, ensuring reliable performance in continuous monitoring environments.

    • Designed for seamless integration with HI510 and HI520 Universal Process Controllers

    • Uses HI764113‑1 Smart Caps for long‑life, low‑maintenance optical DO sensing

    • Built for precise, auto‑compensated dissolved oxygen measurement in industrial processes

See All Specs

aeroplane.png__PID:119d4b1a-2623-400c-8fa4-aec5b49a3bf0

Fast Delivery

Most items ship same day

protection.png__PID:4b1a2623-e00c-4fa4-aec5-b49a3bf05f92

Manufacturer Warranty

All products are covered by manufacturer warranty

technical-support.png__PID:e00c8fa4-aec5-449a-bbf0-5f923431936b

After-Sale Support

24/7 support

You may also be interested in

Ideal for demanding dissolved oxygen monitoring in aeration basins, treatment ponds, and process tanks, the HI764833 optical DO probe delivers precise control of oxygen transfer efficiency. Versatile mounting options include direct submersion via ¾" NPT threads or secure in-line installation in a flow cell using the front sensor threads.

Extended reach capability is achieved with optional extension cables, allowing reliable signal transmission over distances up to 50 meters (164 feet) between the probe and connected controller.

Principle of Operation

Advanced fluorescence quenching technology utilizes an immobilized platinum-based luminophore excited by a blue LED, emitting red light that is quenched by dissolved oxygen molecules. In the absence of oxygen, luminescence lifetime is longest; increasing oxygen levels shorten this lifetime proportionally.

Accurate concentration calculation is derived from the inverse relationship between luminescence intensity/lifetime and oxygen presence. A high-sensitivity photodetector measures the luminescence lifetime, enabling the controller to display results as % saturation or mg/L (ppm) dissolved oxygen with exceptional precision.

Long-term stability and minimal drift are maintained through internal reference signal compensation for optical component aging. This innovative design ensures consistently accurate readings over extended periods with significantly reduced calibration frequency compared to traditional polarographic sensors.

  • Pre-calibrated Smart Cap stores factory calibration data for instant plug-and-play accuracy
  • Dual ¾" NPT threads enable flexible submersion or flow-through installation
  • Integrated temperature sensor provides automatic compensation for precise DO measurements
  • Digital intelligence stores probe model, serial number, firmware version, and full calibration history
  • Virtually maintenance-free operation — no electrolyte refills or membrane replacements required
  • Flow-independent performance delivers reliable results even in static or low-flow conditions
  • Rapid response time for real-time process control and optimization
  • Superior low-oxygen stability ensures accurate readings at near-zero concentrations

    Shipping, Return, and Warranty Policy

    At Blue Tiger Scientific, we are proud to distribute authentic Hanna Instruments products. The following policies apply to all purchases made through our store.

    Shipping Policy

    • All orders are shipped via FedEx from Hanna Instruments' fulfillment center in Smithfield, Rhode Island.
    • FedEx Ground is the standard method; expedited options (2-Day, Overnight) are available for an additional cost.
    • Hanna Instruments only ships to residential or business addresses within the United States (no PO Boxes).
    • Orders placed after business hours, weekends, or holidays will ship the next business day, pending product and carrier availability.
    • Shipping timelines may vary depending on product availability, order size, and carrier logistics.
    • Blue Tiger Scientific and Hanna Instruments are not responsible for carrier delays, weather-related disruptions, or other unforeseen delivery issues once the order has shipped.

    Return Policy

    • All return requests must be coordinated directly with Blue Tiger Scientific before a product is sent back.
    • Products must have a Return Merchandise Authorization (RMA) number issued by Blue Tiger Scientific before being returned.
    • Products must be returned in new or like-new condition, with the original packaging and proof of purchase (such as an invoice or packing slip).
      Customers are responsible for return shipping costs unless otherwise stated.
    • Unauthorized returns (without an RMA) will be refused and returned at the customer's expense.
      Returns are subject to inspection and approval. Products not in acceptable condition may be denied credit.
    • Some products, such as custom-built, special order, and hazardous materials, may not be eligible for return.

    Warranty Policy

    • Hanna Instruments' products are covered by their Limited Warranty against defects in materials and workmanship under normal use.
    • All warranty claims and services are handled directly by Hanna Instruments.
    • Warranty periods vary by product. If unspecified, the standard warranty term is 18 months from the Hanna Instruments factory ship date.
    • If you experience an issue believed to be covered under warranty, please contact Hanna Instruments for guidance on how to submit your warranty request to Hanna Instruments.
    • Customers must follow Hanna Instruments' warranty submission process, including providing a claim number, product model and serial number, and a detailed description of the issue.
    • Hanna Instruments will determine whether products are repaired, replaced, or otherwise serviced under warranty.
    • Note: Warranty coverage does not apply to damage caused by misuse, accidents, unauthorized repairs, or improper storage and handling.

    Important Notes

    • Some Hanna Instruments products are custom-made or built to order. Shipping will occur once the product is ready.
    • In the event of backorders, you may request partial shipments.
    • Delays beyond our control (e.g., material shortages, import delays, or carrier issues) may occasionally occur.

Questions about a product? Ask us here.

email us here: info@bluetigerscientific.com or live chat

Customers are saying

5.00 ★ (3)
Verified