Primary Pressure Standard Gages, to 200,000 psi

Harwood Engineering Company, Inc.

Controlled Clearance Free Piston Gages

200,000 psi or Metric Equivalent

LB Version	KG Version	MD Version
DWT-300	DWT-150 KG	DWT-150 MD
DWT-500	DWT-250 KG	DWT-250 MD
DWT-1000	DWT-500 KG	DWT-500 MD

Features

The austenitic stainless steel weights are:

Insensitive to earth's magnetic field
Noncorroding
Machined to ± 0.01%

Convenient panel smoothly operates the powered loading and unloading of heavy weights:

Reservoirs
Valves
Jacket pressure gage
Electric motor for piston rotation
Built-in fine adjusting 200,000 psi screw pump

Harwood high pressure porting. Certain petroleum distillate fluids are required for 200,000 psi service. At lower pressure service other fluids may be used.

DWT-300

weights supplied: 14-20 lb., 1-10 lb., 1-5 lb., 5-1 lb., and a 10 lb. tare weight
Maximum Pressure, psi	Minimum Pressure (Tare), psi	Nominal Piston Diameter, inch	Nominal Piston Area, in²	Uncertainty of Nominal Area as Supplied, %	Part # of Piston Assembly	Part # of Cylinder Assembly
60,000	2000	0.079788	0.005	0.0125	B-3918	C-6549
36,000	1200	0.103006	0.00833..	0.0097	B-4261	C-6604
30,000	1000	0.112838	0.01	0.0089	B-4263	C-6563
18,000	600	0.145673	0.01666..	0.0069	B-3920	C-6601
15,000	500	0.159577	0.02	0.0063	B-4265	C-6570
12,000	400	0.178412	0.025	0.0056	B-4267	C-6603
9,000	300	0.206013	0.033333..	0.0049	B-4269	C-4653
6,000	200	0.252313	0.05	0.0040	B-4271	B-4272
3,000	100	0.356825	0.1	0.0028	B-4273	B-4274
1,500	50	0.504627	0.2	0.0020	B-4275	B-4276

DWT-500

weights supplied: 9-50 lb., 4-10 lb., 1-5 lb., 5-1 lb., and a 10 lb tare weight
Maximum Pressure, psi	Minimum Pressure (Tare), psi	Nominal Piston Diameter, in.	Nominal Piston Area, in²	Uncertainty of Nominal Area as Supplied, %	Part # of Piston Assembly	Part # of Cylinder Assembly
100,000	2000	0.079788	0.005	0.0125	B-3918	C-6549
60,000	1200	0.103006	0.00833..	0.0097	B-4261	C-6604
50,000	1000	0.112838	0.01	0.0089	B-4263	C-6563
30,000	600	0.145673	0.0166..	0.0069	B-3920	C-6601
25,000	500	0.159577	0.02	0.0063	B-4265	C-6570
20,000	400	0.178412	0.025	0.0056	B-4267	C-6603
15,000	300	0.206013	0.03333..	0.0049	B-4269	C-4653
10,000	200	0.252313	0.05	0.0040	B-4271	B-4272
5,000	100	0.356825	0.1	0.0028	B-4273	B-4274
2,500	50	0.504627	0.2	0.0020	B-4275	B-4276

DWT-1000

weights supplied: 9-100 lb., 4-20 lb., 1-10 lb., 2-5 lb., and a 20 lb. tare weight
Maximum Pressure, psi	Minimum Pressure (Tare), psi	Nominal Piston Diameter, in.	Nominal Piston Area, in²	Uncertainty of Nominal Area as Supplied, %	Part # of Piston Assembly	Part # of Cylinder Assembly
200,000	4000	0.079788	0.005	0.0125	B-3918	C-6549
120,000	2400	0.103006	0.00833..	0.0097	B-4261	C-6604
100,000	2000	0.112838	0.01	0.0089	B-4263	C-6563
60,000	1200	0.145673	0.01666..	0.0069	B-3920	C-6601
50,000	1000	0.159577	0.02	0.0063	B-4265	C-6570
40,000	800	0.178412	0.025	0.0056	B-4267	C-6603
30,000	600	0.206013	0.03333..	0.0049	B-4269	C-4653
20,000	400	0.252313	0.05	0.0040	B-4271	B-4272
10,000	200	0.356825	0.1	0.0028	B-4273	B-4274
5,000	100	0.504627	0.2	0.0020	B-4275	B-4276

DWT-150 KG

weights supplied: 13-10 kg, 2-5 kg, 2-2 kg, 1-1 kg, and a 0.5 kg tare weight
Maximum Pressure, Kg/cm²	Minimum Pressure (Tare), Kg/cm²	Nominal Piston Diameter, cm	Nominal Piston Area, cm²	Uncertainty of Nominal Area as Supplied, %	Part # of Piston Assembly	Part # of Cylinder Assembly
4,500	150	0.206012	0.03333..	0.0123	B-5985	C-6585
3,750	125	0.225676	0.04	0.0113	B-5984	C-6610
3,000	100	0.252313	0.05	0.0101	B-5983	C-6586
2,250	75	0.291346	0.06666..	0.0087	B-5982	C-6609
1,500	50	0.356824	0.1	0.0071	B-5981	C-6608
750	25	0.504627	0.2	0.0050	B-5980	C-6607
300	10	0.797885	0.5	0.0032	B-5979	B-5986

DWT-250 KG

weights supplied: 9-25 kg, 1-10 kg, 2-5 kg, 2-2 kg, 1-1 kg, and a 10 kg tare weight
Maximum Pressure, Kg/cm²	Minimum Pressure (Tare), Kg/cm²	Nominal Piston Diamter, cm	Nominal Piston Area, cm²	Uncertainty of Nominal Area as Supplied, %	Part # of Piston Assembly	Part # of Cylinder Assembly
7,500	300	0.206012	0.03333..	0.0123	B-5985	C-6585
6,250	250	0.225676	0.04	0.0113	B-5984	C-6610
5,000	200	0.252313	0.05	0.0101	B-5983	C-6586
3,750	150	0.291346	0.06666..	0.0087	B-5982	C-6609
2,500	100	0.356824	0.1	0.0071	B-5981	C-6608
1,250	50	0.504627	0.2	0.0050	B-5980	C-6607
500	20	0.797885	0.5	0.0032	B-5979	B-5986

DWT-500 KG

weights supplied: 9-50 kg, 4-10 kg, 1-5 kg, 2-2 kg, 1-1 kg, and a 10 kg tare weight
Maximum Pressure, Kg/cm²	Minimum Pressure (Tare), Kg/cm²	Nominal Piston Diameter, cm	Nominal Piston Area, cm²	Uncertainty of Nominal Area as Supplied, %	Part # of Piston Assembly	Part # of Cylinder Assembly
14,000	300	0.206012	0.03333..	0.0123	B-5985	C-6585
12,500	250	0.225676	0.04	0.0113	B-5984	C-6610
10,000	200	0.252313	0.05	0.0101	B-5983	C-6586
7,500	150	0.291346	0.06666..	0.0087	B-5982	C-6609
5,000	100	0.356824	0.1	0.0071	B-5981	C-6608
2,500	50	0.504627	0.2	0.0050	B-5980	C-6607
1,000	20	0.797885	0.5	0.0032	B-5979	B-5986

DWT-150 MD

weights supplied: 13-10 MD, 2-5 MD, 2-2 MD, 1-1 MD, and a 0.5 MD tare weight
Maximum Pressure, bars	Minimum Pressure (Tare), bars	Nominal Piston Diameter, cm	Nominal Piston Area, cm²	Uncertainty of Nominal Area as Supplied, %	Part # of Piston Assembly	Part # of Cylinder Assembly
4,500	150	0.206012	0.03333..	0.0123	B-5985	C-6585
3,750	125	0.225676	0.04	0.0113	B-5984	C-6610
3,000	100	0.252313	0.05	0.0101	B-5983	C-6586
2,250	75	0.291346	0.06666..	0.0087	B-5982	C-6609
1,500	50	0.356824	0.1	0.0071	B-5981	C-6608
750	25	0.504627	0.2	0.0050	B-5980	C-6607
300	10	0.797885	0.5	0.0032	B-5979	B-5986

DWT-250 MD

weights supplied: 9-25 MD, 1-10 MD, 2-5 MD, 2-2 MD, 1-1 MD, and a 10 MD tare weight
Maximum Pressure, bars	Minimum Pressure (Tare), bars	Nominal Piston Diameter, cm	Nominal Piston Area, cm²	Uncertainty of Nominal Area as Supplied, %	Part # of Piston Assembly	Part # of Cylinder Assembly
7,500	300	0.206012	0.03333..	0.0123	B-5985	C-6585
6,250	250	0.225676	0.04	0.0113	B-5984	C-6610
5,000	200	0.252313	0.05	0.0101	B-5983	C-6586
3,750	150	0.291346	0.06666..	0.0087	B-5982	C-6609
2,500	100	0.356824	0.1	0.0071	B-5981	C-6608
1,250	50	0.504627	0.2	0.0050	B-5980	C-6607
500	20	0.797885	0.5	0.0032	B-5979	B-5986

DWT-500 MD

weights supplied: 9-50 MD, 4-10 MD, 1-5 MD, 2-2 MD, 1-1 MD, and a 10 MD tare weight
Maximum Pressure, bars	Minimum Pressure (Tare), bars	Nominal Piston Diameter, cm	Nominal Piston Area, cm²	Uncertainty of Nominal Area as Supplied, %	Part # of Piston Assembly	Part # of Cylinder Assembly
14,000	300	0.206012	0.03333..	0.0123	B-5985	C-6585
12,500	250	0.225676	0.04	0.0113	B-5984	C-6610
10,000	200	0.252313	0.05	0.0101	B-5983	C-6586
7,500	150	0.291346	0.06666..	0.0087	B-5982	C-6609
5,000	100	0.356824	0.1	0.0071	B-5981	C-6608
2,500	50	0.504627	0.2	0.0050	B-5980	C-6607
1,000	20	0.797885	0.5	0.0032	B-5979	B-5986

455 South Street, Walpole, Massachusetts 02081

phone: 508-668-3600

fax: 508-660-2276

http://www.ultranet.com/~harwood/

email: harwood@ma.ultranet.com