Lab Standards & Instruments: Wood Box Meters

Lab Standards & Instruments: Wood Box Meters

Enlarge Image | Alt Image | Voltmeter Image | Outside View

(MTR) 518-20KV

Rawson electrostatic voltmeter. 0 - 20kv, 40kv max, 16-3/4"SQ, 15-1/2"H. Meter in excellent condition, cabinet lid needs work (glued).

$1100

Enlarge Img | Scale | Plunger | Plunger Pic 2 | Instructions

(MTR) ESH5/10/20/30

Sensitive Research electrostatic voltmeter. 4 scales. 0 - 5 kvdc, 10 kvdc, 20 kvdc, 30 kvdc. Pull plunger on insulator to set voltage range. 10-1/2" x 12" x 8"H. Insulator adds 6.5" depth. Excellent working condition.

$995

Enlarge Img | Case | Alt Image | Model Image

(MTR) 248813-DAY

Daystrom Weston multi-micro ammeter. 8" x 7 1/2" x 4"H. Scales 5, 50, 100, 200, & 500 na + short. Binding post terminals. 190 cal. Mirroed arc. Complete with lid.

$325

Enlarge Image | Side View | Terminals

(EQP) T10AR10K

Beckman resistance standard. 10k ohms, ±1% tolerance. 5w, 0.022 amps. 4 terminal, binding post. 4.98"L x 4.75"H x 3.813"W. NOS. New in the box. Made in the USA / Canada. DC: 11/89. NSN: 6625-00-878-5704.

$245

Enlarge Image | Box | Meter Closeup

(MTR) ESD-2KV

Sensitive Research electrostatic voltmeter. 0 - 2kv DC and AC to 500 KHz. 7-3/4" x 8" x 6-1/4"H.

$350

Enlarge Image | Meter Closeup | Specs Close-up | Wood Box

(MTR) 341

Weston wood box meter. 0 - 30v DC or vac, 0 - 75v DC or vac. Rated accuracy to 1000 Hz. 30v range 140.12 ohms, 75v range 350.3 ohms. Mirrored arc. 8-1/4" x 10-1/2" x 4-3/4"H.

$375

Enlarge Image | Meter Closeup

(MTR) LN-MAM

Antique Leeds & Northrup DC microammeter. Very old. 20 ohm movement. 4 µA / division. 2-1/2" x 4-1/2" x 4"H. Movement in working condition.

$95

Click here for PDF file

(EQP) LN-4025B

Leeds & Northrup standard resistor. 10 ohms. Made in the USA.

$295

Click here for PDF file

(EQP) LN-4045B

Leeds & Northrup standard resistor. 100k ohms. Made in the USA.

$295

Enlarge Image | Alternate View

(MTR) 326

Weston laboratory standard AC & DC volt meter. 0 - 75v, 0 - 150v, 0 - 300v. 14-1/4" x 15" x 6-1/2"H. Patents 1895 to 1921. Beautiful wood cabinet. 100% functional.

$695

Enlarge Image | Close-up View

(MTR) 326-3

Weston Lab Standard DC volt meter. Full scale ranges: 3, 7.5, 15, 30, 75, 150 & 300v DC. Cherry wood cabinet. 14-1/2"D x 15"W x 6"H. Excellent working condition.

$875

(EQP) CA6089

ESI (Electro Scientific Industries) standard resistor. 0.1 ohm, 1.6 amp max. Calibrated @ 0.100001 ohm @ 1 amp. 4 terminal, 1 ground. Made in the USA.

$125

(EQP) GR-1440-9681

General Radio standard resistor. 0.1 ohm, 3 amp max. Made in the USA.

$45

(EQP) GR-1440-9601

General Radio standard resistor. 1 ohm, 1 amp max. Made in the USA.

$45

(EQP) GR-500D-100

General Radio standard resistor. 100 ohm, 100 mA max, ±0.05%. Slot-top binding posts.

$59

(EQP) GR-1440-9651

General Radio standard resistor. 100k ohm, 3 mA max. Made in the USA.

$45 each

(MTR) 772

Weston meter, for model 772 multimeter / analyzer. Ohm / decibel meter. 4.25" x 4" x 2.5" depth. Circa 1938 - 1941. Looks to have been pulled from military service.

$45 each

(MTR) 779

Weston meter. Later model of meter 772. Ohm / decibel meter. 4.25" x 4" x 2.5" depth. Circa 1946.

$45 each

(MTR) 785

Weston meter, for model 785 industrial circuit tester. Ohm meter. 4.25" x 4" x 2.5" depth. Circa 1946.

$45 each

Click here for PDF file

(EQP) 53-5004-6002

API Instruments Co. panel mount thermocoupler pyrometer. -200º to +100º fahrenheit. -150º to 70º centigrade. Requires 10 ohm thermostat (not included). 5 amp contacts. 4-5/8" x 4-5/8" x 5-1/2" behind panel depth.

$150 each

(EQP) GRYE-3067

Gray Instrument Company micro-potentiometer indicator. Model 3067. 9" x 17-7/8" x 8-3/8". This is a very late model. NSN: 6695-00-769-5696.

$950 each

Enlarge Image | View of Carry Case | Close up of Probes

(EQP) PP-NMP

Pocket Probe analog pyrometer. Model NMP0 - 400ºF. 1% accuracy. 2 probes. Includes metal carry case. No battery required. 3-7/8" x 5-1/2" x 2"H. Used, excellent condition.

$195

Close up of Inside

(EQP) WBM-M3M

M.O. Miller M3M dual multimeter. One meter is 1k ohm/volt. The other meter is 150k ohm/volt. Ranges 0-10 amp, 0-100v. NSN: 6625-00-051-2786.

$145 each

(EQP) HAL-LMC

Gray Instrument Company. Hallmark Instruments micro-potentiometer calibrator. 9" x 16-1/2" x 8-1/4".

$250 each

(EQP) WBM2680

Rubicon Instruments Minneapolis Honeywell Model 2680 potentiometer. 10-1/2" x 17-1/4" x 7".

$250 each

(MTR) 310-WATT

Weston AC & DC wattmeter. 50v, 100v & 200v ranges. 250 watts. Includes reversing switch to reverse polarity. 0 - 1200 Hz. Made in 1965. Like new condition.

$695

(MTR) 370-8443

Weston AC & DC ammeter. 0.5 & 1 amp. 0.5 amp range = series connection, 7.4 ohm, 0.144 Henry self-inductance. 1 amp range = multiple connection, 2.4 ohm, 0.0036 Henry self-inductance. Made in 1950. Like new condition.

$395

(MTR) WBM-370

Weston Model 370 wood box lab instrument. Measures absolute amps. Magnetically shielded electro-dynamometer ammeter. 0 - 10 or 0 - 20 amps AC or DC. Dimensions: 8-1/2" x 10-1/2" x 5-3/4". Made in 1956.

$485

(MTR) 8AP9AAT6

General Electric portable AC ammeter. 0 - 1 amp, 0 - 2 amp. 1/100th amp resolution. Rugged, bakelite case with hinged lid. 1950's vintage.

$95

(EQP) WBM-L

WN Matthews and Brother Corp. Woodpecker telefault model L. Telephone line fault detector. Patented 1916, 1918. Fair condition. Includes earphone and exploring coil.
7-3/4" x 10-1/2" x 4".

$295

(EQP) WBM-4285

Leeds & Northrup Kelvin Bridge Ohmmeter No. 4285. Precision low resistance ohmmeter. Measures 0.0001 ohm to 26 ohms. ± 1/2%. Good condition. Includes directions. 16"x6-3/4" x 8". NSN: 6625-00-223-5730.

$450

(EQP) WBM-U-SP

Sensitive Research Instrument Corporation universal polyranger. Model U-SP. Measures AC and DC voltage and current. 15-1/2" x 6-1/2" x 8". Like new condition.

DC scales: 0.2, 2, 20, 200, 1000, 2000 milliamps. 0.005, 0.05, 0.1, 0.5, 2, 20, 200, 1000 volts.
AC Scales: 15, 30, 150, 300, 1500, 3000 milliamps. 0.3, 1.5, 3, 15, 30, 150, 300, 750 volts.

$650

(EQP) WBM-C

Hermach Engelhard model C transfer AC & DC voltammeter. Measures AC, DC, volts, and amps. ± .05%. 0-1500v, 0-25A, 5-50,000 HZ. Excellent condition. Manual included.

$895

Enlarge Image / Rear View

(MTR) ESH-30K

Sensitive Research electrostatic voltmeter. 0 to 30 kv scale. Model ESH, #500358. Dimensions: 10-1/4" x 11-3/4" x 8-3/4" high. Only one available.

$795

(MTR) ESH/SINGER

Singer electrostatic voltmeter. Switchable to 3 scales: 10 kv, 25 kv, 50 kv. 13" x 24" x 14". Tested, works great.

*** SOLD OUT ***

(EQP) GR-1440-9631

General Radio 1k ohm standard resistor. Initial deviation individually measured and marked. 30 ma max. Gold plated terminals.

*** SOLD OUT ***

Enlarge Image | Alt Image | Side Image

(MTR) 248813

Weston '622' Micro Ammeter. 8" x 7 1/4" x 3 1/2". Scales: 5, 50, 100, 200, & 500 na T short. Bind post terminals. Last calibrated @ 1%. Mirrored ARF. Latch on top is not included.

$245

(EQP) U23952

Sensitive Research electrostatic kilovolt meter. 2 inputs: 750 vac or vdc, 3000 vac only. Leather strap. Black, bakelite case. 4-1/2" x 5-1/4" x 5-1/2" high. Excellent condition.

$325

(EQP) 101434

Sensitive Research watt meter. 75v & 150v ranges. Side terminals. 0 - 7.5, 0 - 15, 0 - 30 watt scales. Leather strap. Black, bakelite case. 4-1/2" x 5" x 5-1/4" high. Excellent condition.

$375

(EQP) WBM-WG.42753-1

Westinghouse dual scale meter. 0 - 50 mv, 0 - 150 mv. Bakelite case. Perfect addition to almost any shunt with 50 mv output. Dimensions: 7-1/8" x 8" x 4" high. Excellent condition except for a broken strap which is understandable since it was made in 1943!!

$275

(MTR) 931

Weston DC voltmeter. 3 inputs via binding posts: 150, 300 or 750 vdc. 5" x 6" high x 3" deep.

$149 each

Lab Standards & Instruments Listed

Part Number

Description

Price

(EQP) WBM-ESD300	0 - 300v AC/DC Sensitive Research model ESD. Electrostatic voltmeter. 7-1/2" deep x 10" wide x 6-1/2" high.	175.00	Add
(EQP) WBM-ESD500	0 - 500v AC/DC Sensitive Res. model ESD. Electrostatic voltmeter. AC to 1 MHz 7-1/2" deep x 10" wide x 6-1/2" high.	199.00	Add
(EQP) WBM-518-500	0 - 500v AC/DC Rawson Elec. Instr. model 518. Electrostatic voltmeter. 8-1/2" deep x 9-1/2" wide x 6" high. NOTE: Not working.	50.00	Add
(EQP) WBM-518-1K	0 - 1000v AC/DC Rawson Elec. Instr. model 518. Electrostatic voltmeter. 8-1/2" deep x 9-1/2" wide x 6" high.	225.00	Add
(EQP) WBM-518-2K	0 - 2000v AC/DC Rawson Elec. Instr. model 518. Electrostatic voltmeter. 8-1/2" deep x 9-1/2" wide x 6" high.	255.00	Add
(EQP) WBM-ESD2K	0 - 2000v AC/DC Sensitive Res. model ESD. Electrostatic voltmeter. No lid. 7-1/2" deep x 10" wide x 6-1/2" high	295.00	Add
(EQP) WBM-UNI3K	0 - 3000v AC/DC Singer Meter model University. Electrostatic voltmeter. 5" square x 6" high.	225.00	Add
(EQP) WBM-311-2300	Potential Transformer Weston model 311. Ratios 2300v (3000T) & 1150v (1500T) 115vac, 15va, 25-125 Hz.	275.00	Add
(EQP) WBM-311-460	Potential Transformer Weston model 311. Ratios 460v (600Test) & 230v (300Test) 115vac, 15va, 25-133 Hz.	225.00	Add
(EQP) WBM-931	0 - 30µA DC Weston model 931. 0 - 30 µADC. 5" wide x 3-1/2" deep x 6" high.	225.00	Add
(EQP) WBM-501	0 - 40µA AC/DC Rawson Instrument model 501. 0 - 40 µA DC or AC.	225.00	Add
(EQP) WBM-S400	4 - 40 - 400 µA DC Sensitive Res. model S. 0 - 4 µA, 0 - 40µA & 0 - 400µA scales. 7-1/2" square x 4-1/2" high.	325.00	Add
(EQP) WBM-HDC-B	0.05 - 0.1 - 0.5 - 1 - 5 - 10 - 50 - 100ma DC Hallmark Standards model HDC-B. 0 - 0.05 mA + 0.1, 0.5, 1, 5, 10, 50 & 100 mADC ranges	225.00	Add
(EQP) WBM-326	0 - 2.5 & 5 amps AC/DC Weston model 326. 0 - 2.5 amps & 0 - 5 amps AC or DC. Lab Standard. 15" square x 6" high.	350.00	Add
(EQP) WBM-DC110B	1 - 0 - 1 Null CSC. model DC-110B Precision DC millivoltmeter. 1000-100mv. Null TUM - 1.0mv	125.00	Add
(EQP) GR-728A	0 - 3/10 VDC General Radio. model 728A. DC vacuum tube voltmeter. 0 - 3 & 0 - 10 vdc scales.	175.00	Add
(EQP) WBM-D-1K	10 - 30 - 100 - 300 - 1kv AC/DC Sensitive Res. model D. Dynamometer. 8" square x 6-1/2" high.	150.00	Add
(EQP) WBM-D-300	5 - 10 - 30 - 100 - 300v AC/DC Sensitive Res. model D. Dynamometer. 8" square x 6-1/2" high.	125.00	Add
(EQP) WBM-341-30	0 - 15/30v AC/DC Weston model 341. 0 - 15 and 0 - 30 volt scales, 25 - 125 Hz.	75.00	Add
(EQP) WBM-501-5	0.5 - 1 - 1.5 - 2-5v AC/DC Rawson Electric model 501.	75.00	Add
(EQP) WBM-GSP	1.5 - 750 DCV, 7.5 ma - 3DCA in 18 ranges Electronic Instr. Model GSP multimeter. 200/V. 8" square x 4-3/4"H.	200.00	Add
(EQP) WBM-512D	2 - 5 - 10 - 20 - 50 - 100 - 200-500 ranges in DCmA, DCV, ACmA, ACV Rawson Model 512D multimeter. 9" square.	200.00	Add
(EQP) WBM-C2	1-1kvDC, 10ma-10DCA in 14 ranges Sensitive Research model C-2 multimeter. 7-1/2" square x 4-1/2" high	250.00	Add
(EQP) WBM-1-100	0.01 - 0.1 - 1 - 10 - 100 DCV, 10 / 100 DCA Weston model 1, no cover, multimeter. 8" wide x 9-1/2" deep x 3-1/2" high	125.00	Add
(EQP) WBM-622	1.5 - 750 DCV, 7.5 ma - 3DCA in 18 ranges Weston model 622 multimeter. 8" wide x 7-1/2" deep x 3" high	200.00	Add
(EQP) WBM-425AR	10µV - 1v and 0.003 - 3 mADC in 18 ranges HP model 425AR. 10, 30, 100µV / 0.3, 1, 3, 10, 30mV / 0.1, 0.3, 1V / 0.003, 0.01, 0.03, 0.1, 0.3, 1, 3 maDC	250.00	Add
(EQP) WBM-2733	Precision Potentiometer Honeywell model 2733. 0 - 101 mV & 0 - 10.1 mV	200.00	Add
(EQP) WBM-E30438-1	Precision Potentiometer Gray Instrument model E30438-1. 0 - 11 mV.	150.00	Add
(EQP) WBM-503	0 - 1 mV Rawson Electric model 503. 0 - 1 mV range. 7-1/2" square x 6" high.	175.00	Add
(EQP) WBM-S100	0 - 50 / 0 - 100 mVDC Sensitive Res. model S. 0 - 50 millivolt DC, 0 - 100mVDC. 7-1/2" square x 4-1/2" high.	225.00	Add
(EQP) WBM-5305	Precision Potentiometer Leeds & Northrup model 5305 Test Set. 10 - 10 Meg	175.00	Add
(EQP) WBM-786182	Precision Potentiometer Leeds & Northrup model 786182. 6" deep x 9-1/2" wide x 9" high.	195.00	Add
(EQP) WBM-8686	Precision Millivolt Potentiometer Leeds & Northrup model 8686 , w/ manual -10.1mV to 100.1 mV	395.00	Add
(EQP) WBM-2780	Precision Potentiometer Rubicon model 2780 , 0.01 - 1.6v, 10-1/2" deep x 17" long x 7" high.	295.00	Add

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