Battery Gauges | McMaster-Carr

	For Battery Voltage For Battery Voltage

	Measures Measures

	Maximum Voltage Maximum Voltage

6V DC

14V DC

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	For Panel Cutout Diameter For Panel Cutout Diameter

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	Maximum AC Current Maximum AC Current

	Width Width

	Height Height

	Depth Depth

	Maximum DC Current Maximum DC Current

	Window Material Window Material

Glass

Plastic

	Measurement Increments Measurement Increments

Siemens

Volts

	Battery Chemistry Battery Chemistry

Dry-Cell AGM Lead Acid

Wet-Cell Lead Acid

	Input Frequency Input Frequency

	Digital Display Type Digital Display Type

LED

LCD

	Input Resistance Input Resistance

	Mount Type Mount Type

Threaded Stud

Adhesive

	For Panel Cutout Depth For Panel Cutout Depth

	Specifications Met Specifications Met

UL Recognized
Component

C-UL Listed

UL Listed

	Input AC Voltage Input AC Voltage

85-250V AC

120V AC

	For Battery Type For Battery Type

Rechargeable

Disposable

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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100 Products

Monitors for Large-Cell Batteries

Install on lift trucks and other electric vehicles to display battery condition. These monitors track battery drain and have an hour meter that tracks use throughout the life of the battery. A low-discharge indicator flashes at 70% discharge and indicates empty at 80% discharge.

								Quick-Disconnect Tab
For Battery Voltage	Dia.	For Panel Cutout Dia.	Dp. Behind Panel	Features	Includes	Accuracy	Wire Connection Type	Wd.	Thick.		Each
12	2"	2 1/16"	2 3/16"	Low Discharge Indicator	6-Digit Hour Meter	±1%	Quick-Disconnect Terminals	0.25"	0.032"	00000000	0000000
24/36	2"	2 1/16"	2 3/16"	Low Discharge Indicator	6-Digit Hour Meter	±1%	Quick-Disconnect Terminals	0.25"	0.032"	00000000	000000
36/48	2"	2 1/16"	2 3/16"	Low Discharge Indicator	6-Digit Hour Meter	±1%	Quick-Disconnect Terminals	0.25"	0.032"	00000000	000000

Large-Cell Battery Surge Protector/Charge Monitors

See the charge level of a large-cell battery while protecting it from power surges. These monitors also check the condition of your charging system.

For Dry-Cell AGM Lead Acid and Wet-Cell Lead Acid Batteries
For Battery Voltage	Battery Connection Type (Cord Lg.)	Features	Mount Type	Ht.	Wd.	Dp.		Each
12	3/8" ID Ring Terminal (20")	Charge Status Indicator	Adhesive Back	1 3/4"	2 1/4"	1"	0000000	000000

Voltage and Conductivity Testers for Large-Cell Batteries

Measure the voltage of your batteries as well as the current they can supply to check battery health.

For Dry-Cell AGM Lead Acid and Wet-Cell Lead Acid Batteries
For Battery Type	For Battery Voltage	For Battery 20-hr. Rate Capacity Range, amp-hrs.	Measures	Measurement Increments	Voltage	Conductivity, S	Display Type	Digital Display Type	Includes	Ht.	Wd.	Dp.		Each
Rechargeable	6/12	1.2-55	Conductivity, DC Voltage	Siemens, Volts	6-14V DC	20-1,200	Digital	LED	12" Leads with Sheathed Alligator Clips	7 1/2"	3 1/2"	2"	0000000	0000000

Adjustable Battery Load Testers for Large-Cell Batteries

Test large engine batteries that draw up to 500 amps. Turn the dial to vary the load applied to the battery to see how it performs at different loads.

For Dry-Cell AGM Lead Acid and Wet-Cell Lead Acid Batteries
For Battery Type	For Battery Voltage	Current Load Capacity, A	Battery Connection Type	Battery Connection Cord Lg., ft.	Ht.	Wd.	Dp.		Each
Rechargeable	12	0-500	Clamps	3.5	10"	5"	10 1/2"	000000	0000000

Battery Load Testers with Alternator Test Lead for Large-Cell Batteries

In addition to applying a fixed load to small engine batteries that draw up to 125 amps, this tester can check for defective alternator diodes.

For Dry-Cell AGM Lead Acid and Wet-Cell Lead Acid Batteries
For Battery Type	For Battery Voltage	Current Load Capacity, A	Battery Connection Type	Battery Connection Cord Lg., ft.	Includes	Ht.	Wd.	Dp.		Each
Rechargeable	6/12	125	Clamps	2	4-ft. Test Lead for Defective Alternator Diodes, Side Terminal Adapters	9 1/2"	3 1/2"	3 1/2"	0000000	0000000

Battery Load Testers for Large-Cell Batteries

Apply a fixed load to small engine batteries that draw up to 125 amps.

Tester with a 60/125-amp current load capacity offers two fixed loads. It is better for testing smaller batteries that draw up to 60 amps.

For Dry-Cell AGM Lead Acid and Wet-Cell Lead Acid Batteries
For Battery Type	For Battery Voltage	Current Load Capacity, A	Battery Connection Type	Battery Connection Cord Lg., ft.	Includes	Ht.	Wd.	Dp.		Each
Rechargeable	6/12	60/125	Clamps	2	__	9 1/2"	3 1/2"	3 1/2"	0000000	0000000
Rechargeable	6/12	125	Clamps	2	Side Terminal Adapters	9 1/2"	3 1/2"	3 1/2"	0000000	000000

Battery-Life Testers

Check if it's time to replace your disposable batteries.

For Battery Type	For Battery Size		Each
Disposable	AA, AAA, C, D, 9V, All Button/Coin Cell Batteries	0000000	000000

Panel Monitors

For 1/8 DIN Panel Cutout

For 3/64 DIN Panel Cutout

See how much electricity motors, generators, and other electrical equipment use. The high-visibility digital screen displays electrical measurements with more accuracy than an analog panel monitor.

Monitors with a scaling range can be adjusted to compensate for measurements that are outside the monitor's set measuring range.

Measures Voltage

										Input
Accuracy	AC Voltage	DC Voltage	Sample Rate	Scaling Range	Ht.	Wd.	Dp.	Digital Display Type	Wire Connection	AC Voltage	Frequency, Hz	Resistance	Temperature, ° F		Each
For 1/8 DIN Panel Cutout
±1% of reading ±5 counts	0-200	__	3 per sec.	__	2.28"	4.04"	3.45"	LED	Screw Terminals	120	50, 60	9.9 MOhm	32° to 130°	0000000	0000000
±0.2% of reading ±1 count	0-600	__	10 per sec.	0.1X to 4X	2.28"	4.04"	3.76"	LED	Screw Terminals	120	50, 60	1 MOhm	32° to 120°	0000000	000000
±0.1% of reading ±1 count	__	0-2V DC	3 per sec.	__	2.28"	4.04"	3.45"	LED	Screw Terminals	120	50, 60	10 MOhm	32° to 130°	0000000	000000
±0.1% of reading ±1 count	__	0-20V DC	3 per sec.	__	2.28"	4.04"	3.45"	LED	Screw Terminals	120	50, 60	10 MOhm	32° to 130°	0000000	000000
±0.1% of reading ±1 count	__	0-200V DC	3 per sec.	__	2.28"	4.04"	3.45"	LED	Screw Terminals	120	50, 60	9.9 MOhm	32° to 130°	0000000	000000
±0.1% of reading ±1 count	__	0-200mV DC	3 per sec.	__	2.28"	4.04"	3.45"	LED	Screw Terminals	120	50, 60	100 MOhm	32° to 130°	0000000	000000
For 3/64 DIN Panel Cutout
±0.5% of reading +5 counts	0-200	__	3 per sec.	0.5X to 2X	0.95"	2.84"	2.52"	LCD	Screw Terminals	85-250	40-440	1,000 MOhm	32° to 130°	000000	000000
±0.1% of reading ±1 count	__	0-2V DC	3 per sec.	0.5X to 2X	0.95"	2.84"	2.52"	LCD	Screw Terminals	85-250	40-440	10,000 MOhm	32° to 130°	000000	000000
±0.1% of reading ±1 count	__	0-20V DC	3 per sec.	0.5X to 2X	0.95"	2.84"	2.52"	LCD	Screw Terminals	85-250	40-440	10,000 MOhm	32° to 130°	000000	000000
±0.1% of reading ±1 count	__	0-200V DC	3 per sec.	0.5X to 2X	0.95"	2.84"	2.52"	LCD	Screw Terminals	85-250	40-440	9,900 MOhm	32° to 130°	000000	000000
±0.1% of reading ±1 count	__	0-200mV DC	3 per sec.	0.5X to 2X	0.95"	2.84"	2.52"	LCD	Screw Terminals	85-250	40-440	10,000 MOhm	32° to 130°	000000	000000

Measures Current

										Input
Accuracy	AC Current, A	DC Current	Sample Rate	Scaling Range	Ht.	Wd.	Dp.	Digital Display Type	Wire Connection	AC Voltage	Frequency, Hz	Temperature, ° F		Each
For 1/8 Panel Cutout
±1% of reading ±5 counts	0-5	__	3 per sec.	__	2.28"	4.04"	3.45"	LED	Screw Terminals	120	50, 60	32° to 130°	0000000	0000000
±0.1% of reading ±1 count	__	0-2 mA	3 per sec.	__	2.28"	4.04"	3.45"	LED	Screw Terminals	120	50, 60	32° to 130°	0000000	000000
±0.1% of reading ±1 count	__	0-20 mA	3 per sec.	__	2.28"	4.04"	3.45"	LED	Screw Terminals	120	50, 60	32° to 130°	0000000	000000
±0.1% of reading ±1 count	__	0-200 mA	3 per sec.	__	2.28"	4.04"	3.45"	LED	Screw Terminals	120	50, 60	32° to 130°	0000000	000000
2A ± 5 counts	__	0-2 A	3 per sec.	__	2.28"	4.04"	3.45"	LED	Screw Terminals	120	50, 60	32° to 130°	0000000	000000
For 3/64 Panel Cutout
±0.5% of reading +5 counts	0-5	__	3 per sec.	0.2X to 2X	0.95"	2.84"	2.52"	LCD	Screw Terminals	85-250	40-440	32° to 130°	000000	000000
±0.1% of reading ±1 count	__	0-2 mA	3 per sec.	0.5X to 2X	0.95"	2.84"	2.52"	LCD	Screw Terminals	85-250	40-440	32° to 130°	0000000	000000
±0.1% of reading ±1 count	__	0-2 A	3 per sec.	0.5X to 2X	0.95"	2.84"	2.52"	LCD	Screw Terminals	85-250	40-440	32° to 130°	000000	000000
±0.1% of reading ±1 count	__	0-20 mA	3 per sec.	0.5X to 2X	0.95"	2.84"	2.52"	LCD	Screw Terminals	85-250	40-440	32° to 130°	0000000	000000
±0.1% of reading ±1 count	__	0-200 mA	3 per sec.	0.5X to 2X	0.95"	2.84"	2.52"	LCD	Screw Terminals	85-250	40-440	32° to 130°	0000000	000000

Measures Frequency

								Input
Accuracy	Frequency, Hz	Sample Rate	Ht.	Wd.	Dp.	Digital Display Type	Wire Connection	AC Voltage	Frequency, Hz	Temperature, ° F		Each
For 1/8 Panel Cutout
±0.2% of reading ±0.2 Hz	20-200	3 per sec.	2.28"	4.04"	3.45"	LED	Screw Terminals	120	50, 60	32° to 130°	0000000	0000000
For 3/64 Panel Cutout
±0.2% of reading ±2 Hz	20-200	3 per sec.	0.95"	2.84"	2.52"	LCD	Screw Terminals	85-250	40-440	32° to 130°	000000	000000

Analog Panel Monitors

Acrylic Window

Glass Window

Observe rapidly changing electrical values in equipment such as motors and generators with an analog display that shows the magnitude and rate of change more easily than a digital display.

Monitors with electromagnetic interference (EMI) resistance are shielded to prevent interference and maintain accuracy when mounted on a magnetic panel.

Measures Voltage

								For Panel Cutout			Input, Hz
Input Resistance, ohms	AC Voltage	DC Voltage	Accuracy	Ht.	Wd.	Dp.	Features	Dia.	Dp.	Wire Connection	Frequency	Frequency Calibration		Each
Acrylic Window
1,000	__	0-10	±2%	1.76"	1.75"	1.82"	EMI Resistance	1.55"	1.41"	Screw Terminals	__	__	00000000	0000000
1,000	__	0-10	±2%	3.25"	3.25"	2.54"	EMI Resistance	2.79"	1.92"	Screw Terminals	__	__	0000000	000000
1,000	__	0-15	±2%	1.76"	1.75"	1.82"	EMI Resistance	1.55"	1.41"	Screw Terminals	__	__	00000000	000000
1,000	__	0-15	±2%	3.25"	3.25"	2.54"	EMI Resistance	2.79"	1.92"	Screw Terminals	__	__	0000000	000000
1,000	__	0-30	±2%	1.76"	1.75"	1.82"	EMI Resistance	1.55"	1.41"	Screw Terminals	__	__	00000000	000000
1,000	__	0-30	±2%	3.25"	3.25"	2.54"	EMI Resistance	2.79"	1.92"	Screw Terminals	__	__	0000000	000000
1,000	__	0-100	±2%	1.76"	1.75"	1.82"	EMI Resistance	1.55"	1.41"	Screw Terminals	__	__	00000000	000000
1,000	__	0-100	±2%	3.25"	3.25"	2.54"	EMI Resistance	2.79"	1.92"	Screw Terminals	__	__	0000000	000000
1,000	__	0-150	±2%	3.25"	3.25"	2.54"	EMI Resistance	2.79"	1.92"	Screw Terminals	__	__	0000000	000000
3,333	0 to 50	__	±2%	3.25"	3.25"	2.54"	EMI Resistance	2.79"	1.92"	Screw Terminals	25-125	60 Hz	00000000	000000
25,000	0 to 150	__	±2%	2.47"	2.47"	2.33"	EMI Resistance	2.22"	1.85"	Screw Terminals	25-125	60 Hz	00000000	000000
25,000	0 to 150	__	±2%	3.25"	3.25"	2.54"	EMI Resistance	2.79"	1.92"	Screw Terminals	25-125	60 Hz	00000000	000000
50,000	0 to 300	__	±2%	2.47"	2.47"	2.33"	EMI Resistance	2.22"	1.85"	Screw Terminals	25-125	60 Hz	00000000	000000
50,000	0 to 300	__	±2%	3.25"	3.25"	2.54"	EMI Resistance	2.79"	1.92"	Screw Terminals	25-125	60 Hz	00000000	000000
Glass Window
1,000	__	0-10	±2%	1.75"	1.75"	1.81"	EMI Resistance	1.56"	1.43"	Screw Terminals	__	__	0000000	000000
1,000	__	0-10	±2%	3"	3"	2.56"	EMI Resistance	2.83"	2.05"	Screw Terminals	__	__	0000000	000000
1,000	__	0-15	±2%	1.75"	1.75"	1.81"	EMI Resistance	1.56"	1.43"	Screw Terminals	__	__	0000000	000000
1,000	__	0-15	±2%	3"	3"	2.56"	EMI Resistance	2.83"	2.05"	Screw Terminals	__	__	0000000	000000
1,000	__	0-30	±2%	1.75"	1.75"	1.81"	EMI Resistance	1.56"	1.43"	Screw Terminals	__	__	0000000	000000
1,000	__	0-30	±2%	3"	3"	2.56"	EMI Resistance	2.83"	2.05"	Screw Terminals	__	__	0000000	000000
1,000	__	0-100	±2%	1.75"	1.75"	1.81"	EMI Resistance	1.56"	1.43"	Screw Terminals	__	__	0000000	000000
1,000	__	0-100	±2%	3"	3"	2.56"	EMI Resistance	2.83"	2.05"	Screw Terminals	__	__	00000000	000000
1,000	__	0-150	±2%	3"	3"	2.56"	EMI Resistance	2.83"	2.05"	Screw Terminals	__	__	0000000	000000
3,333	0 to 50	__	±2%	3"	3"	2.56"	EMI Resistance	2.83"	2.05"	Screw Terminals	25-125	60 Hz	00000000	000000
25,000	0 to 150	__	±2%	2.38"	2.38"	2.68"	EMI Resistance	2.22"	2.17"	Screw Terminals	25-125	60 Hz	00000000	000000
25,000	0 to 150	__	±2%	3"	3"	2.56"	EMI Resistance	2.83"	2.05"	Screw Terminals	25-125	60 Hz	00000000	000000
50,000	0 to 300	__	±2%	2.38"	2.38"	2.68"	EMI Resistance	2.22"	2.17"	Screw Terminals	25-125	60 Hz	00000000	000000
50,000	0 to 300	__	±2%	3"	3"	2.56"	EMI Resistance	2.83"	2.05"	Screw Terminals	25-125	60 Hz	00000000	000000

Measures Current

									For Panel Cutout			Input, Hz
Input Resistance, ohms	AC Current, A	DC Current	Accuracy	Ht.	Wd.	Dp.	Features	Includes	Dia.	Dp.	Wire Connection	Frequency	Frequency Calibration		Each
Acrylic Window
0.001	__	0-50 A	±2%	3.25"	3.25"	2.54"	EMI Resistance	__	2.79"	1.92"	Screw Terminals	__	__	0000000	0000000
0.001	0 to 50	__	±2%	2.47"	2.47"	2.33"	__	__	2.22"	1.85"	Screw Terminals	25-125	60	00000000	000000
0.001	0 to 50	__	±2%	3.25"	3.25"	2.54"	__	__	2.79"	1.92"	Screw Terminals	25-40	60	0000000	000000
0.0017	__	0-30 A	±2%	3.25"	3.25"	2.54"	EMI Resistance	__	2.79"	1.92"	Screw Terminals	__	__	0000000	000000
0.0025	0 to 15	__	±2%	3.25"	3.25"	2.54"	__	__	2.79"	1.92"	Screw Terminals	25-40	60	0000000	000000
0.004	0 to 10	__	±2%	3.25"	3.25"	2.54"	__	__	2.79"	1.92"	Screw Terminals	25-40	60	0000000	000000
0.005	__	0-10 A	±2%	3.25"	3.25"	2.54"	EMI Resistance	__	2.79"	1.92"	Screw Terminals	__	__	0000000	000000
0.008	0 to 5	__	±2%	3.25"	3.25"	2.54"	__	__	2.79"	1.92"	Screw Terminals	25-40	60	0000000	000000
0.008	0 to 100	__	±2%	2.47"	2.47"	2.33"	__	100:5 Current Transformer	2.22"	1.85"	Screw Terminals	25-125	60	00000000	000000
0.008	0 to 100	__	±2%	3.25"	3.25"	2.54"	__	100:5 Current Transformer	2.79"	1.92"	Screw Terminals	25-125	60	000000	000000
0.01	__	0-5 A	±2%	1.76"	1.75"	1.82"	EMI Resistance	__	1.55"	1.41"	Screw Terminals	__	__	00000000	000000
0.01	__	0-5 A	±2%	3.25"	3.25"	2.54"	EMI Resistance	__	2.79"	1.92"	Screw Terminals	__	__	00000000	000000
0.025	0 to 3	__	±2%	3.25"	3.25"	2.54"	__	__	2.79"	1.92"	Screw Terminals	25-40	60	00000000	000000
2	__	0-50 mA	±2%	3.25"	3.25"	2.54"	EMI Resistance	__	2.79"	1.92"	Screw Terminals	__	__	00000000	000000
4	__	0-25 mA	±2%	1.76"	1.75"	1.82"	EMI Resistance	__	1.55"	1.41"	Screw Terminals	__	__	00000000	000000
4	__	0-25 mA	±2%	3.25"	3.25"	2.54"	EMI Resistance	__	2.79"	1.92"	Screw Terminals	__	__	00000000	000000
10	__	0-100 A	±2%	3.25"	3.25"	2.54"	EMI Resistance	100A Shunt	2.79"	1.92"	Screw Terminals	__	__	0000000	000000
Glass Window
0.001	__	0-50 A	±2%	3"	3"	2.56"	EMI Resistance	__	2.83"	2.05"	Screw Terminals	__	__	0000000	000000
0.001	0 to 50	__	±2%	2.38"	2.38"	2.68"	__	__	2.22"	2.17"	Screw Terminals	25-125	60	00000000	000000
0.001	0 to 50	__	±2%	3"	3"	2.56"	__	__	2.83"	2.05"	Screw Terminals	25-125	60	00000000	000000
0.0017	__	0-30 A	±2%	3"	3"	2.56"	EMI Resistance	__	2.83"	2.05"	Screw Terminals	__	__	0000000	000000
0.0025	0 to 15	__	±2%	3"	3"	2.56"	__	__	2.83"	2.05"	Screw Terminals	25-125	60	00000000	000000
0.004	0 to 10	__	±2%	3"	3"	2.56"	__	__	2.83"	2.05"	Screw Terminals	25-125	60	00000000	000000
0.005	__	0-10 A	±2%	3"	3"	2.56"	EMI Resistance	__	2.83"	2.05"	Screw Terminals	__	__	0000000	000000
0.008	0 to 5	__	±2%	3"	3"	2.56"	__	__	2.83"	2.05"	Screw Terminals	25-125	60	00000000	000000
0.008	0 to 100	__	±2%	2.38"	2.38"	2.68"	__	100:5 Current Transformer	2.22"	2.17"	Screw Terminals	25-125	60	00000000	000000
0.008	0 to 100	__	±2%	3"	3"	2.56"	__	100:5 Current Transformer	2.83"	2.05"	Screw Terminals	25-125	60	00000000	000000
0.01	__	0-5 A	±2%	1.75"	1.75"	1.81"	EMI Resistance	__	1.56"	1.43"	Screw Terminals	__	__	0000000	000000
0.01	__	0-5 A	±2%	3"	3"	2.56"	EMI Resistance	__	2.83"	2.05"	Screw Terminals	__	__	0000000	000000
0.028	0 to 3	__	±2%	3"	3"	2.56"	__	__	2.83"	2.05"	Screw Terminals	25-125	60	00000000	000000
2	__	0-50 mA	±2%	3"	3"	2.56"	EMI Resistance	__	2.83"	2.05"	Screw Terminals	__	__	0000000	000000
4	__	0-25 mA	±2%	1.75"	1.75"	1.81"	EMI Resistance	__	1.56"	1.43"	Screw Terminals	__	__	0000000	000000
4	__	0-25 mA	±2%	3"	3"	2.56"	EMI Resistance	__	2.83"	2.05"	Screw Terminals	__	__	0000000	000000
10	__	0-100 A	±2%	3"	3"	2.56"	EMI Resistance	100A Shunt	2.83"	2.05"	Screw Terminals	__	__	000000	000000

Concentration Meters

Also known as refractometers, these measure concentration with two or three drops of a solution. Place your sample on the reflecting prism and look through the eyepiece to view the concentration on the internal scale.

Concentration meters with automatic temperature compensation standardize readings at 68° F to prevent inaccurate results in fluctuating temperatures.

Concentration meters with freezing-point scale measure the freezing point of propylene glycol and ethylene glycol as well as the specific gravities of battery acids from 1.15 to 1.30.

Celsius and Fahrenheit Scale Meters

For Testing Freezing Point and Specific Gravity
Temperature Range	Graduation Marks	Automatic Temperature Compensation (ATC) Range	Specific Gravity	Lg.	Material	Container Material		Each
-60° to 32° F	2° F	50° to 86° F	1.15 to 1.3	7"	Nickel-Plated Brass	Plastic	000000	0000000
-50° to 0° C	1° C	10° to 30° C	1.15 to 1.3	7"	Nickel-Plated Brass	Plastic	000000	000000

Battery Testing Density Meters

Meter with 1.1 to 1.3 Specific Gravity Range

Meter with 1.1 to 1.3
Specific Gravity Range
and Built-in Thermometer

Meter with
1.1 to 1.35
Specific Gravity Range

Check the condition of battery fluid by measuring its density to indicate the state of charge.

Meter with built-in thermometer compensates for temperature variations for more accurate readings.

Meter with specific gravity range of 1.1 to 1.35 can withstand drops as high as 10 feet.

Specific Gravity Range	Body Material	Features		Each
1.1 to 1.3	Plastic	__	0000000	00000
1.1 to 1.3	Glass	Built-in Thermometer	0000000	00000
1.1 to 1.35	Plastic	__	0000000	00000