China Gem Digital Refractometer Dgr-501

Brief Introduction

Gem Digital Refractometer is for measuring the gem refractive index of an unknown gem stones, it is covering the full range from 1.40 to 2.00. It gives a quick and reliable differentiation of diamonds and imitations colored stones from their many imitations.

If the instrument has been subjected to rough handling in shipment , or if your environments is very different in temperature,calibration adjustment may require.

1.Turn on the " ON" button

2.Press "TEST" button until the "CAL" appears

3.When the screen display "1.487", place scale sample (1.487) on test platform, then press test button; now the screen display "1.806", place scale sample (1.806) on the test platform, then press test button again.

4.When the screen display "END", the calibration is finished.

Technical parameters

Test Range: 1.400~2.000

Power Input: 9V Battery

Working Temperature: 10~30 Degree

Warranty and Guarantee:

Offers 1 YEARS WARRANTY
If you are not satisfied when you receive your item, please return it within 14 days for a replacement or money back. Please contact me before you return it.

If item is defective in 3 months, We will send you a replacement without extra charger, or offer refund after we receive the defective item.

If item is defective after 3 months, you can still send it back to us. We will send you a new one after receiving the defective item. But you have to pay the extra shipping fee.

**Photos of Products:

**Our Other models for Handheld Refractometers:

No.Product nameModelMearuring range1Brix Refractometer 0-20% BrixRHB-20ATCMeasuring Range: 0-20% Brix
Minimum Division: 0.1% Brix
Accuracy: ±0.10%
ATC Compensation Range: 10°C~30°C (50°F~86°F)2Brix Refractometer 0-32% BrixRHB-32ATCMeasuring Range:
Minimum Division: 0.2% Brix
Accuracy: ±0.20%
ATC Compensation Range: 10°C~30°C (50°F~86°F)3Brix RefractometerRHB-62ATCMeasuring Range: 28-62% Brix
Minimum Division: 0.2% Brix
Accuracy: ±0.20%
ATC Compensation Range: 10°C~30°C (50°F~86°F)4Brix RefractometerRHB-82ATCMeasuring Range: 45-82% Brix
Minimum Division: 0.5% Brix
Accuracy: ±0.50%
ATC Compensation Range: 10°C~30°C (50°F~86°F)5Brix & Honey RefractometerRHB-58-90-BRIXMeasuring Range: 58-90% Brix
10~33% water
38~43 Be'
Minimum Division: 1% Brix /1% water,0.5%Be'
Accuracy: ±1% Brix /±1% water/±0.5%Be'
ATC Compensation Range: 10°C~30°C (50°F~86°F)6Brix RefractometerRHB-92ATCMeasuring Range: 58-92% Brix
Minimum Division: 0.5% Brix
Accuracy: ±0.50%
ATC Compensation Range: 10°C~30°C (50°F~86°F)7Brix RefractometerRHB0-50ATCMeasuring Range: 0-50% Brix
Minimum Division: 0.5% Brix
Accuracy: ±0.50%
ATC Compensation Range: 10°C~30°C (50°F~86°F)8Salinity RefractometerRHB0-80Measuring Range: 0-80% Brix
Minimum Division: 0.5% Brix
Accuracy: ±0.50%
ATC Compensation Range: 10°C~30°C (50°F~86°F)9Brix RefractometerRHB0-90B Measuring Range: 0-90% Brix
Minimum Division: 0.5% Brix
Accuracy: ±0.50%
ATC Compensation Range: 10°C~30°C (50°F~86°F)10Salinity RefractometerRHS-10ATC Measuring Range: 0-10%salinity, 1.000~1.070sg
Minimum Division: 0.1% salinity 0.001% sg
Accuracy: ±0.10% salinity ±0.001% sg
ATC Compensation Range: 10°C~30°C (50°F~86°F)11Salinity RefractometerRHS-28ATCMeasuring Range: 0-28%salinity,
Minimum Division: 0.2% salinity
Accuracy: ±0.2% salinity
ATC Compensation Range: 10°C~30°C (50°F~86°F)12Salinity & Brix RefractometerRHS-203ATC0-28% S SALINITY | 0-32% BRIX
Minimal Division: 0.2% SALINITY | 0.2% BRIX
Accuracy: ± 0.2% SALINITY | ± 0.2% BRIX
ATC Compensation Range: 10°C~30°C (50°F~86°F)13Wine/Oe RefractometerRHW-25ATC Measuring Range: 0-25%Vol, 0-190 Oe°, 0-44%mas sacch
Minimum Division: 0.5%Vol, 1Oe°, 0.5%mas sacch
Accuracy:0.5%Vol, 1Oe°, 0.5%mas sacch
ATC Compensation Range: 10°C~30°C (50°F~86°F)14Wine/Oe RefractometerRHW-25BEATC Measuring Range: 0-25%Vol, 0-20 Be°
Minimum Division: 0.2%Vol, 0.2%Be°
Accuracy: ±0.2%Vol, ±0.2%Be°
ATC Compensation Range: 10°C~30°C (50°F~86°F)15Wine/Oe RefractometerRHW-80ATC Measuring Range: 0-80%W/W
Minimum Division: 1%W/W
ATC Compensation Range: 10°C~30°C (50°F~86°F)16Wine/Oe RefractometerRHW-25BRIX-ATC Measuring Range: 0~25%Vol 0~40%Brix
Resolution Factor: 0.2%,0.2%
ATC Compensation Range: 10°C~30°C (50°F~86°F)17Beer Brewing RefractometerRSG-32ATC 0~ 32% Brix Scale
1.000 ~ 1.130 Wort Specific Gravity
Accuracy:±0.2% Brix ±0.001 Wort Specific Gravity
Scale Divisions:
0.2% Brix
0.001 Wort Specific Gravity
ATC Compensation Range: 10°C~30°C (50°F~86°F)18Clinical RefractometerRHC-200ATC Measuring Ranges:
Serum Protein : 0 - 12g/dl
Specific Gravity : 1.000 - 1.050sg
Refractive Index: 1.330RI - 1.360RI
Division:
Serum Protein : 0.2g/dl
Specific Gravity : 0.005sg
Refractive Index: 0.0005 RI
Accuracy:
Serum Protein : ±0.2g/dl
Specific Gravity : ±0.005sg
Refractive Index: ±0.0005 RI
ATC CompensationRange: 10°C~30°C (50°F~86°F)19Antifreeze RefractometersRHA-503ATCMeasuring Range:
Ethylene Glycol: -50°C-0°C
Propylene Glycol: -50°C-0°C
Cleaning Fluids: -40°C-0°C
Battery Fluids: 1.100-1.400sg20Adblue/ Antifreeze Refractometer RHA-603ATCMeasuring Range:
Ethylene Glycol: -50°C-0°C
Propylene Glycol: -50°C-0°C
Cleaning Fluids: -40°C-0°C
Battery Fluids: 1.100-1.400sg
Adblue:30-35%21Urine Refractometer for Dog & CatRHC-300ATCMeasuring Ranges:
Serum Protein : 2 - 14g/dl
Dog Urine Specific Gravity : 1.000 - 1.060sg
Cat Urine Specific Gravity : 1.000 - 1.060sg22Soya-bean Milk Refractometer HB-612ATCMeasuring Range:
0~25% soybean milk
0-32% brix

**After sales service
*DELIVERY
1.Worldwide shipping(Except some countries and APO/FPO address)
2. The orders will be processed timely after payment verified
3. We only ship to confirmed address, your order address must match your recipient address,
4. We offer different kind of delivery ways,such as China-post airmail, e-packet, DHL and EMS.and other seller's Shipping Method,you can choose the delivery way according to your acceptable freight.
5. If you do not receive your package within 60 days from payment, just contact with us, we will check the shipment for you.
*RETURN & REFUNDWhen package arrive,please make sure the outside packing is in well condition,then,you can sign&accept the package.You have 7 days to contact us and 30 days to return it from the date you received the package; If this item is in your possession more than 7 days, it is considered used and WE WILL NOTACCEPT YOUR REFUND OR REPLACeMENTDefective item should be reported to us and returned to us within warranty period(better in original package). You must tell us what the defect is and the tracking number you send it back 4. Return shipping cost will be prepay by buyer.
5.We normally declare package with Lower Price or As A Gift for custom invoice to save extra taxes,if youhave any special requirement about custom invoice, please let us know before shipment out from here
*about us
1.Our aim is Make Every Buyer Satisfied with our products and service
2. We provide both Drop shipping and wholesale, if you are interested in those, contact us freely by leaving a message,or trade manager,visa SKYPE,WE CHAT,WHATSAPP
Our online service time is:
Beijing 8:30-1230
14:00-18:00
Moscow
03:30-07:30
09:00-13:00
New york 02:00-06:00
20:00-00:30
London
00:30-04:30