AU-300K NEW Design Electronic Digital Water Gold Tester Machine, Water Gold Testing Machine
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Product Highlights
- High Precision Testing: Density resolution up to 0.001g/cm3 and weight resolution 0.005g for accurate results.
- Multi-Metal Analysis: Tests gold, platinum, silver, and alloys with wide K-value and PT/S range coverage.
- Lifetime Maintenance: Comprehensive life-long maintenance support provided for all purchased machines.
- OEM Service Available: Original manufacturer offering OEM services to print your logo on instruments.
- Fast & Simple Operation: Two-step procedure with no sample cutting required; results in 5-20 seconds.
- RS-232 Connectivity: Standard RS-232 interface allows convenient connection to PC and printer.
- CE & FCC Certified: Products meet international safety standards with CE and FCC certifications.
- Direct Factory Support: Only authorized direct purchases receive genuine after-sale customer service.
Product Attributes
- Customization
- Available
- Warranty
- 3 Years;Life-Long Maintenance
- Type
- Gold Testing Machine
- Model NO.
- AU-300K
- Certification
- CE, FCC
- Usage
- Water Gold Tester
- Density Resolution
- 0.001g/cm3
- Weight Resolution
- 0.005g
- Minimum Weight
- 4G
- Power Supply
- Europe Standard AC 100V - 240V
- Interface
- RS-232
- Delivery Time
- Stock
- After-Sale Service Provided
- Yes
- Testing Before Delivery
- Yes
- OEM Service
- Yes
- Transport Package
- Carton Packing
- Trademark
- Quarrz
- Origin
- Dongguan, China
- HS Code
- 9027809900
- Production Capacity
- 300 Sets/Month
Shipping
- Shipping Cost:
- Contact the supplier about freight and estimated delivery time.
Online Trading Protection
- Payment Guarantee
-
Platform-protected payments with refund support for eligible order issues.
- Platform Logistics
- Clearer shipment tracking with platform-supported logistics.
- Inspection Service
- Optional pre-shipment inspection for quality and quantity checks.
- After-Sales & Dispute Handling
- Platform-assisted dispute resolution, including refunds or returns when applicable.
Only orders placed and paid through Made-in-China.com Secured Trading are eligible for payment protection and the corresponding platform services.
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Product Description
AU-300K NEW Design Electronic Digital Water Gold Tester Machine, Water Gold Testing Machine
Statement
To help to protect your benefit and enjoy good after-sale customer service.Please verify if the store is "Dongguan Hongtuo Instrument Co.,Ltd".Also please verify our band "DahoMeter "and "Quarrz".We are the only manufacturer of these products in China.Recently we found out some shops in MadeInChina just copied our products completely.We have never authorized any other shops to sell our products.
We ONLY offer the after-sale customer service to the customers who purchase the machines from our factory DIRECTLY.

Application
pawnbroking,jewelry industry,banking industry,jewelry testing center,mining industry,precious metal recycling,precious metal materials researching laboratory.,etc.
These series instrument gold tester is the dramatic updating and upgrading products.Compared with other competing products,it has been focused on enhancing weighting resolution,simplified operation procedure and operation method,upgraded software application function,improved reliability of measuring result. offer respectively three content measuring model for gold,platinum,silver and one alloy measuring model;
No need to bundle samples.Following value can be displayed precisely and quickly with only two procedure:
(1) karat value,percentage content,density for gold
(2) PT value,percentage content,density for platinum
(3) S value,percentage content,density for silver
(4) percentage content,density for other alloy.
Measuring Type
Precious metal.such as gold,Karat gold,platinum,silver.
Mixed metal or other alloy metal.
Jewelry materials.such as ring,necklace,bracelet,watchband,belt fastener,gold ingot,gold bar,statue,coin.,etc.
Notes:
Please check the samples to be tested firstly when do testing:
(1). products of which inside is hollow
if the hollow is closed.water or other liquids can't get access into,the samples can't be tested
if the hollow is opened,water or other liquids can get access into,the samples can be tested
(2). products set with precious stones------can't be tested
(3). products of which the density is very close to precious metal------can't be tested
Features
- Distinguish whether the gold,karat gold,platinum,silver,other precious metal is the genuine or not.
- Test the purity of gold,karat gold,platinum,silver to confirm if the marked content is correct or not.
- No need to cut samples;also it can be measured immediately.
- Can shift to measure Karat and purity percentage of gold-silver -copper,gold-copper,gold-silver respectively.
- Function of density measuring and normal gram scale.
- Either water or alcohol would be as medium.
- Function of setting actual water temperature.
- Adopt completed injection molding PC sink(length:15.3cm X width10.7cm X 9.3cm)
- Including RS-232 interface;It's convenient to connect PC and printer.AU-40 could be optionally availabe to print result.
- Adopt injection moulding windproof dustproof shield;Convenient configuration;Better durability.
- Power supply:AC 100V-240V;50HZ/60HZ(Europe standard)
- Weight/packing size:4.5kg/length 42.5cm X width 17.5cm X height 32.5cm
Measurement Resolution And Range
- AU-300K weighting resolution:0.005g,minimum weight:4g,density resolution:0.001g/cm3
- AU-600K weighting resolution:0.005g,minimum weight:4g,density resolution:0.001g/cm3
- AU-120K,200K weighting resolution:0.001g,minimum weight:2g,density resolution:0.001g/cm3
- 900K,1200K,2000K,3000K weighting resolution:0.01g;minimum weight:5g;density resolution:0.001g/cm3
- K value range:9k,10k,11k,12k,13k,14k,15k,16k,17k,18k,19k,20k,21k,22k,23k,24k and % percentage content.
- Platinum content range:PT600,PT650,PT700,PT750,PT800,PT850,PT900,PT950,PT1000 and % percentage content.
- Silver content range:S600,S650,S700,S750,S800,S850,S900,S950,S1000 and % percentage content.
- The proportion of copper-silver for gold-silver-copper can be shifted cyclically with 9/1,8/2,7/3,6/4,5/5,4/6,3/7,2/8,1/9.the default setting is 7/3.
Measuring Procedure
(1) Measure the weight in air firstly,press ENTER button.
(2) Place the sample into water to measure weight in water.Press ENTER button.display result.
Standard Accessories
(1) Host,(2)Sink,(3)Measuring plate,(4)Tweezers,(5)Thermometer,(6)weight,(7)windproof dustproof cover(8)One set of measuring gold dust accessories(9)Power supply
Specification Table
| Brand | Quarrz | ||
| Model | AU-300K / AU-600K / AU-900K | AU-120K / AU-200K | AU-1200K / AU-2000K / AU-3000K |
| Style | Hot and Classic | High-precision | High-capacity |
| Maximum weight | 300g / 600g / 900g | 120g / 200g | 1200g / 2000g / 3000g |
| Weight standard deviation | 0.005g / 0.005g /0.01g | 0.001g | 0.01g |
|
Minmum measuring sample Reference weight |
4g / 4g / 5g | 2g | 5g |
| Density resolution | 0.01g/cm3 | 0.001g/cm3 | 0.001g/cm3 |
| Sink size | Length15.3 cm×width10.7 cm×height9.3cm | Length20.3 cm×width15.7 cm×height11.3cm | |
| Measuring function |
(1)karat value,percentage content,density for gold (2)PT value,percentage content,density for platinum (3)S value,percentage content,density for silver (4)percentage content,density for other alloy. |
||
| Gold K value | (9 ,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24)K &content percentage % | ||
| Platinum | PT600 ,PT650,PT700,PT750,PT800,PT850,PT900,PT950,PT1000 & content percentage % | ||
| Silver | S600 ,S650,S700,S750,S800,S850,S900,S950,S1000 & content % | ||
| Measuring principle | Archimedes buoyancy method | ||
| Measuring time | About 5 to 20 seconds | ||
| Measuring procedure |
(1)Measure the weight in air firstly,press ENTER button. (2)Place the sample into water to measure weight in water.Press ENTER button.display result. |
||
| Parameter setting | Water temperature setting,measuring medium density setting,air density setting,main materials and secondary materials density setting,copper-silver proportion setting | ||
| Copper-silver proportion range | can be shifted cyclically with 9/1,8/2,7/3,6/4,5/5,4/6,3/7,2/8,1/9.the default setting is 7/3. | ||
| Calibration method | Single button calibration,automatic testing | ||
| Standard accessories | (1)Host,(2)Sink,(3)Measuring plate,(4)Tweezers,(5)Thermometer,(6)weight,(7)windproof dustproof cover(8)One set of measuring gold dust accessories(9)Power supply | ||
| Data interface | Standard RS-232 interface | ||
| Optional accessories | AU-40 printer,AU-40A data connecting line | ||
| Power supply | AC100V~240V 50HZ/60HZ Europe standard | ||
| Gross weight/size | 4.3kg/ Length 42.5 cm× width 17.5 cm×height 32.5cm (no including weights) |
||
Note:since thermometer contains mercury.it would not be allowed to be carried by air shipment.please prepare thermometer by yourselves.
Advantage For Quarrz's Precious Metal Tester Gold Tester
- Wide karat value for gold display from 9K to 24K and % percentage content.
- Wide PT value for platinum display from PT600 to PT1000 and % percentage content.
- Wide S value for silver display from S600 to S1000 and % percentage content.
- Adopt completed testing board and unobstructed without lifting lid design,more simpler operation,also makes the measuring result more reliable.
- Two procedure; No need to bundle sa
Packaging

Customer Satisfaction
Please don't hesitate to contact us if you have any questions or concerns before or after your purchase. We are committed to your 100% satisfaction.
Feedback

Our Services
- 100% Competitive price we are the original manufacturer of densimeter for years, the large scale production make our products more competitive, that's the reason we are very confident to offer the most possible competitive price for the same level testing instruments in the world.
- High quality standards we have the powerful professional researching and technology team to support quality;Our quality has been proved by the good market reaction for years;Our product are built to meet the industrial standards and global standards;Every instrument get checked and approved by our QC before delivery.
- Faultless service we have the professional customer service team to provide the one to one service for you;we can help you to enjoy the one-stop service without any worries;we have the completed after-sales service policy and quality insurance policy;we guarantee instruments for one year and life-long maintenance(Gold Purity Tester for two years)
- Efficient logistics we have the stable partner to help us to deliver the goods to the any corner of the worldwide shortly.Air shipment;International express:DHL/UPS/FEDEX/TNT(5 days to 7 days)
- OEM service We are the original manufacturer of densimeter,that is verified by the third party and ****** on site;We can provide you OEM service and print your logo on the instruments.
About Company
We, Dongguan Hongtuo Instrument Co., Ltd, a China based company, are pleased to introduce ourselves as a notable testing equipments and machines manufacturer.Our company was established in the year 2000 with two primarily motto, which includes complete client satisfaction and to reach top-most position in the international market. The exceptional quality of our products like Gold Tester,Gold Testing Machine,Density Meter,Universal Tensile Testing Machine,Climatic Chamber,Melt Flow Index Tester,Charpy Impact Testing Machine,Tap Density Tester,Abrasion Tester,Ultrasonic Flaw Detector,Surface Roughness Tester and other Laboratory Testing Equipment, etc. is our company's USP.


Certification

About the Supplier
This supplier has been audited by BV. Verify the report on the official BV website with ID "MIC-ASR2421192". Items marked "" are certified.
Company Profile
Hongtuo Instrument Co., Ltd., formerly established in 2002, was mainly engaged in OEM production of density instruments. In 2010, we established DahoMeter, the exclusive brand of density meter. In the same year, we started to incorporate HongTuo Instrument Company and setup the business division of physical testing instruments. The division is specialized in the R& D, production and sales of various physical testing instruments and environmental testing instruments.
The main product lines are: Tensile testing machine, engineering plastics testing equipment, rubber and plastic testing equipment, wear abrasion testing machine, leather footwear testing machine, paper testing instrument, luggage testing equipment, batteries testing equipment, environmental testing chamber, cables and electricians testing equipment, density meters, moisture testers, and other quality control instruments.
Hongtuo Instrument is a powerful physical testing instrument service provider. The company integrates R& D, production, sales and service. It specializes in providing high quality and high reliability material testing instrument solutions. It also provides high quality OEM, ODM and CEM product foundry solutions and services for the industry.
Hongtuo's products are exquisite in workmanship, reliable in performance, high in precision, long in service life and high in quality. With high quality performance, Hongtuo actively expands domestic and foreign business, after several years of development, through Hongtuo International (Hong Kong) ), the products are exported to the United States, Britain, Sri Lanka, Myanmar, Spain, Portugal, South Korea, Australia, New Zealand, Turkey, Malaysia, Indonesia, India, Vietnam, Singapore, Russia, ...And other countries and regions.
In China, Hongtuo's instruments is widely applied in research institutes, quality inspection institutions, research laboratories, polymer rubber, tires, sports and sports equipment, wire and cable, auto parts, alloy materials, metallurgy industry, magnetic materials, ceramic industry, glass products, paper products, building materials, and other fields., etc. Product quality has been trusted and recognized by customers.
The excellent quality, and the technical service processing capability of before, during and after sales is the basis for serving the customers. Hongtuo attaches great importance to the processing capability of each link and the comprehensive protection of the customer. Up to now, Hongtuo have set up four customer service centers and after-sales service centers in Dongguan, Beijing, Shenzhen and Hangzhou, all of which are further improving high-level services, including technical consultation, solution, business processing, installation training, after-sales service, etc. Ensure can provide the more professional, accurate and reliable product solutions and service guarantees for customers.
Business philosophy
Customer first, people oriented
Innovative development, Pursuit of excellence quality and reliable service to win the achievement of the brand
Culture
Sincerity, teamwork, continuous improvement, and shared growth
Value
Integrity, progress, innovation, cooperation
Vision
Become the respected professional technology company
Spirit of service:
Fast respond, honest, reliable, professional and thoughtful
Innovative spirit:
Change breakthroughs, pursue higher precision, more reliable performance, and better operation convenience
About Our Factory & Business Background
-
Business Type
- Manufacturer/Factory & Trading Company
- Address
- Floor 9, Building 2, No. 8, Chuangyi East Road, Daojiao Town, Dongguan, Guangdong, China
-
Plant Area
- 2073 square meters
-
Number of Employees
- 19
-
Registered Capital
- 10,880,000 RMB
-
Terms of Payment
- LC, T/T, PayPal, Western Union
-
International Commercial Terms(Incoterms)
- FOB, CIF, EXW
-
Average Lead Time
-
Peak Season Lead Time: within 15 workdays
Off Season Lead Time: within 15 workdays -
Nearest Port
- Shenzhen Port
-
Minimum Order Quantity
- 1 set
-
Supply Chain Partners
- 18
Our Production Capability & Technical Expertise
-
Main Products
- Testing Instrument, Density Meter, Universal Test Machine, Melt Flow Index Tester, Izod Charpy Impact Tester, HDT Tester, Notch Sampler, Environmental Test Chamber, DSC Tester, UV Aging Test Chamber
-
Production Lines
- 5
-
Production Machines
- Tapping Facility, Laser Marking Facility, Drilling Facility, Cutting Facility, Welding Facility
-
QA/QC inspectors
- 2 people
-
Inspection Type for Finished Products
- 100% inspection(Visual inspection & Function inspection)
-
Inspection Method for Finished Products
- Have instructions and uniformly followed
-
Customization Options
- Customization from Samples, Customization from Designs, Full Customization, Minor Customization, Flexible customization
-
ODM Service Available
- Yes
-
OEM Service Available
- Yes
-
R&D Engineers
- 2 people
-
Traceability of Raw Materials
- Yes
-
Own Brand
- Yes
Our Industry Experience & Global Business Record
-
Year of Establishment
- 2010-01-06
-
Export Year
- 11 years
-
Main Markets
- North America, South America, Europe, Southeast Asia/ Mideast, Africa, East Asia(Japan/ South Korea), Australia
-
Repeat Buyers Choice
- 50%~80%
-
Number of Foreign Trading Staff
- 3
-
Overseas Agent/Branch
- No
-
New Products Launched in Last year
- Yes
Our Certifications, Standards & Industry Recognition
-
Product Certification
- CE
-
Cooperated with Fortune 500
- Yes
FAQ
- What metals can this tester analyze?
- It tests gold, platinum, silver, and other alloys, displaying K-value, PT/S value, percentage content, and density.
- Is the warranty period fixed?
- We provide a 3-year warranty for the machine and life-long maintenance support.
- Can I customize the product with my logo?
- Yes, we offer OEM services and can print your logo on the instruments as the original manufacturer.
- What is the minimum order quantity?
- The Minimum Order Quantity is 1 set.
- How long does delivery take?
- Delivery time is stock. Peak and off-season lead times are within 15 workdays.
- What payment methods are accepted?
- We accept LC, T/T, PayPal, and Western Union.
- Does the machine require sample cutting?
- No, there is no need to cut samples; you can measure them immediately.
- What is the power supply requirement?
- It supports AC 100V-240V, 50HZ/60HZ (Europe standard).
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