HP 81521B
The HP 81521B is a versatile InGaAs optical head for accurate power measurements, featuring a wide 800-1650 nm wavelength range and compatibility with HP/Agilent lightwave multimeters.
HP / Agilent 81521B Optical Head
The HP / Agilent 81521B is a high-performance InGaAs optical head designed for precise and reliable optical power measurements. It is engineered for use with the HP 8153A and 8163A/B series Lightwave Multimeters. Featuring a broad wavelength range from 800 nm to 1650 nm and a wide dynamic power range, this optical head is an ideal solution for a variety of applications, including fiber optic component testing, system verification, and R&D laboratory use. Its robust design ensures stable and repeatable measurements, making it a trusted tool for professionals in the telecommunications and photonics industries.
Technical Specifications:
- Detector Type: InGaAs (Indium Gallium Arsenide)
- Wavelength Range: 800 nm to 1650 nm
- Power Range: +10 dBm to -90 dBm
- Uncertainty (at reference conditions): ±2.2%
- Compatibility: HP/Agilent 8153A, 8163A/B, 8164A/B Lightwave Multimeters
| Brand | HP |
|---|---|
| Model | 81521B |
GENERAL DELIVERY INFORMATION
Thank you for visiting and shopping at www.zxanhyd.com. Following are the terms and conditions for the Shipping Policy for ZXAN Hydraulic.
Orders will be processed and shipping during standard working hours (0830 – 1730 BST) Monday to Friday (excluding Bank Holidays)., are processed and despatched on the same business day. If we are experiencing a high volume of orders, shipments may be delayed by 1-2 Days. Please allow additional days in transit for delivery. If there will be a significant delay in shipment of your order, we will contact you via email or telephone.
NTERNATIONAL DELIVERY RATES & ESTIMATES
Shipping charges for your order will depend on weight and country the order is to be shipped to. All cost will be calculated and displayed at checkout. All orders for delivery within the Asia will arrive on a 2-5 day delivery service depending on Country location. All shipments outside the Asia will arrive on a 3–7-day delivery service depending on Country location. Please check for accurate delivery times with our Sales department. If you Parcel has not arrived within the time expected please do not hesitate to contact us. Please ensure the ship to address you type during checkout is correct. We are not responsible for any wrong or undeliverable addresses.
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WORKING CLOSELY WITH TOP CARRIER EXPERTS
We use some of the top carrier companies in the world, although you can use your own carrier to collect the order. All deliveries require a signature on delivery. Below are our main carrier companies.

DAMAGES
ZXAN Hydraulic is not liable for any products damaged or lost during shipping. If you received your order damaged, please contact us to file a claim. Please save all packaging materials and damaged goods before filing a claim.
RETURNS POLICY
Our Return & Refund Policy provides detailed information about options and procedures for returning your order.

