Best Autofocus Calibration Reference

EZshoot Scope Leveling Kit with High-Precision Bubble Leveling System, Magnetic Universal Leveling Tool, Compact Storage Case for Equipment and Maintenance

Easy use - The reference level is equipped with an ultra-strong magnetic bottom, placing steadier on the scopes turret cap with steel inside. Smaller bubbles, more accurate calibration, combine it with the barrel clamp level until the reference level is aligned with the barrel clamp level..
Higher Accuracy - We optimized the calibration distance and all the levels are carefully checked at the factory. The integrated bubble is more accurate and sensitive to adjust the crosshair of your scope, effectively enhance precision, especially long-range shooting, even 101 yards away..
Premier Craft - Non-marring pads of barrel clamp prevent scratching from your barrel. The scope leveling kit is made of rugged aluminum alloy with an anodized finish..
Versatility - This level scope mounting is excellent for leveling various diameter barrel, red dot and other optics..
Package Include - 1 x Reference Level, 1 x Barrel Clamp Level, 1 x Allen Key, 1 x Instructions and friendly customer service..

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General Hydroponics Ph 4.01 & Ph 7.0 Calibration Solution Kit, 8 oz

2 Bottles - 1 Each Of Ph 4.01 & Ph 7.0 Calibration Solution.
Highest Quality Electronic Meter Reference Solutions.
Each Batch Is Checked To Ensure Calibration.

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Hach 2100Q01 2100Q Portable Turbidimeter

Single-standard RapidCal calibration offers the simplest solution for low-level measurements.
Single-step verification and on-screen assisted calibration eliminates the need to reference complicated manuals.
Optional USB module enables simple data transfer. All data is easily downloaded to any computer, providing superior data integrity and availability.
Exclusive algorithm in the Rapidly Settling Turbidity mode provides accurate, repeatable measurements for rapidly settling, difficult-to-measure samples while eliminating the need for redundant measurements and estimating.

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Mardatt 6 Pcs Precision Scale Calibration Weight Set, 5g 10g 2x20g 50g Grams Steel Weights Calibration with Tweezers for Digital Balance Scale, Jewellery Scale, M2 Class (Total 100g)

【Complete Calibration Weight Set】Everything you need to keep your scales zeroed and accurate in one protective box case. Includes 1 x 50g, 2 x 20g, 1 x 10g, 1 x 5g calibration weights and tweezers,totally 6Pcs(100g)..
【Stainless Steel Anti-oxidation】Steel construction of calibration weight with chrome plated finish for well stability, corrosion and rust resistance, and low magnetic susceptibility, Durable material will not be damaged and can be reused multiple times..
【Extreme Accuracy】Permissible error is +/_0.003g, comparable with NIST-traceable calibration weights in their precision, yet highly affordable. Weights are standard measuring tools for meeting your daily demands..
【Perfect Case】Each of these weights are individually identified with their weight stamped into them for ease of reference, and packed in a custom-recessed, foam-padded presentation box for protection. The multi-layer packaging can avoid damage during transportation..
【Wide Application】The complete calibration set for Digital Jewellery Scale, General Laboratory, Commercial, and Educational use..

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Mardatt 16 Pcs Precision Scale Calibration Weight Set,10/20/50/100/200g, 500/200/100/50/20/10mg Steel Weights Calibration with Tweezers for Digital Balance Scale, Jewellery Scale(Total 500g)

【Complete Calibration Weight Set】Everything you need to keep your scales zeroed and accurate in one protective box case. Includes 1 x 200g, 2x 100g, 1 x 50g, 2 x 20g, 1 x 10g, 1 x 5g , 1 x 10mg, 2 x 20mg, 1 x 50mg, 1 x 100mg, 2 x 200mg, 1 x 500mg calibration weights and tweezers,totally 16Pcs(500g)..
【Anti-oxidation Stainless Steel Material】Steel construction of calibration weight with chrome plated finish for well stability, corrosion and rust resistance, and low magnetic susceptibility, Durable material will not be damaged and can be reused multiple times..
【Extreme Accuracy】Permissible error is +/_0.003g, comparable with NIST-traceable calibration weights in their precision, yet highly affordable. Weights are standard measuring tools for meeting your daily demands..
【Perfect Case】Each of these weights are individually identified with their weight stamped into them for ease of reference, and packed in a custom-recessed, foam-padded presentation box for protection. The multi-layer packaging can avoid damage during transportation..
【Wide Application】The complete calibration set for Digital Jewellery Scale, General Laboratory, Commercial, and Educational use..

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Mardatt 8 Pcs Precision Scale Calibration Weight Set, 10g 2x20g 50g 2x100g 200g Grams Steel Weights Calibration with Tweezers for Digital Balance Scale, Jewellery Scale, M2 Class(Totally 500g)

【Complete Calibration Weight Set】Everything you need to keep your scales zeroed and accurate in one protective box case. Includes 1 x 200g, 2x 100g, 1 x 50g, 2 x 20g, 1 x 10g, 1 x 5g calibration weights and tweezers,totally 8Pcs(500g)..
【Anti-oxidation Stainless Steel Material】Steel construction of calibration weight with chrome plated finish for well stability, corrosion and rust resistance, and low magnetic susceptibility, Durable material will not be damaged and can be reused multiple times..
【Extreme Accuracy】Permissible error is +/_0.003g, comparable with NIST-traceable calibration weights in their precision, yet highly affordable. Weights are standard measuring tools for meeting your daily demands..
【Perfect Case】Each of these weights are individually identified with their weight stamped into them for ease of reference, and packed in a custom-recessed, foam-padded presentation box for protection. The multi-layer packaging can avoid damage during transportation..
【Wide Application】The complete calibration set for Digital Jewellery Scale, General Laboratory, Commercial, and Educational use..

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Apera Instruments Premium-Series PH60S Food pH Pocket Tester Kit, Swiss Spear pH Electrode, ±0.01 pH Accuracy, -2.00-16.00 pH Range (AI313)

Swiss spear sensor with Long-life reference system (Replaceable), made for cheese, sushi rice, meat, fruit, milk, yogurt, sauce, and other solid/semi-solid's pH measurement (also works great for general water solutions).
Easy auto. calibration with auto. temperature compensation (ATC).
Unique high/low value alarm function, instantly reminding you of any results that need your attention with a red backlight.
Large clear LCD with 3 backlit colors (indicating 3 different modes), dual display of temp. /pH, and indications of completed calibrations and stable readings.
Complete test kit with ready-to-use calibration solutions, calibration bottles, storage solutions, AAA batteries, and a lanyard all in a portable carrying case.

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General Hydroponics GH1552 PH 7 Calibration Solution for Gardening, 1-Quart lab-chemical-buffers, Green

General Hydroponics uses the highest quality electronic meter reference solutions.
Growers can use our reference solutions widely among many popular brands of meters using the NaCl scale.
General Hydroponics technicians check each batch to ensure that our solutions are exactly calibrated each time they are used.
For calibration of pH Meters and electrode storages.

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Apera Instruments PH9500 Research-Grade Benchtop pH Meter Kit with Comprehensive GLP Data Management and Data Output to Printer/PC

Comprehensive GLP data management including manual/auto. data logger with 500 sets of storage and USB Data export to a pin-type mini printer or PC for further analysis and report.
Equipped with Apera TestBench that consolidates a flexible electrode holder, buffer organizers, and an intelligent magnetic stirrer altogether, streamlining the process of measurement and calibration..
An advanced yet intuitive user interface with plain language and graphic screen prompts, supporting English, Spanish, German, and Chinese..
Supplied with Swiss LabSen 211 glass-body pH electrode featured with the blue impact-resistant glass membrane and a Long-life reference system, achieving the highest possible accuracy (0. 003 pH).
1 to 5 points of automatic calibration with a choice of 5 pH standard buffers and smart self-diagnosis to ensure successful calibrations. Slope and offset are ready to view after calibration..

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