Ohmite Resistors

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Ohmite D225K50RE Resistor 50 Ohms 225W 0832 MEX
Ohmite D225K50RE Resistor 50 Ohms 225W 0832 MEX
$50.00
quality
10 Ohmite Resistor 18 Meg Ohm 2 Watt 5 Carbon Comp RC42GF186J
10 Ohmite Resistor 18 Meg Ohm 2 Watt 5 Carbon Comp RC42GF186J
$11.29
quality
L8J1K5 Ohmite 1500 Ohms 5 Flange Resistor 1 PER
L8J1K5 Ohmite 1500 Ohms 5 Flange Resistor 1 PER
$10.00
quality
D12K3KOE Ohmite RESISTOR POWER ADJ 3K OHM 12W 1 PER
D12K3KOE Ohmite RESISTOR POWER ADJ 3K OHM 12W 1 PER
$10.00
quality
75603 R305 Ohmite 305 OHms 10 18X5X2inch Resistor 1 PER
75603 R305 Ohmite 305 OHms 10 18X5X2inch Resistor 1 PER
$600.00
quality
Ohmite C300K1R0E Resistor Wire Wound 1 Ohm 300W 10
Ohmite C300K1R0E Resistor Wire Wound 1 Ohm 300W 10
$15.00
quality
Ohmite 400 Ohm 10W Flame Retardant Wirewound Resistor FREE SHIPPING
Ohmite 400 Ohm 10W Flame Retardant Wirewound Resistor FREE SHIPPING
$5.99
quality
Ohmite 250 Ohm 20W Vitreous Enamel Wirewound Power Resistor B20J250E NEW
Ohmite 250 Ohm 20W Vitreous Enamel Wirewound Power Resistor B20J250E NEW
$3.50
quality
VP10FA5 Ohmite Wirewound Resistors 5 Ohms100WAdjust Wirewound Resistor
VP10FA5 Ohmite Wirewound Resistors 5 Ohms100WAdjust Wirewound Resistor
$10.00
quality
LOT OF 3 RESISTORS FEWKES 96 CTG8524 OHMITE 58141 IC9006E105DH20FA GE E105DH20LA
LOT OF 3 RESISTORS FEWKES 96 CTG8524 OHMITE 58141 IC9006E105DH20FA GE E105DH20LA
$30.78
quality
75388 100 Ohmite 100 OHMS 5 Resistor 1 PER
75388 100 Ohmite 100 OHMS 5 Resistor 1 PER
$10.00
quality
D25K2KOE Ohmite RESISTOR POWER ADJ 2K OHM 25W 1 PER
D25K2KOE Ohmite RESISTOR POWER ADJ 2K OHM 25W 1 PER
$10.00
quality
805F2RO Ohmite RESISTOR CHAS MNT 2 OHM 1 5W 1 PER
805F2RO Ohmite RESISTOR CHAS MNT 2 OHM 1 5W 1 PER
$6.00
quality
66156 R05 Ohmite 005 Ohms 10 Resistor 1 PER
66156 R05 Ohmite 005 Ohms 10 Resistor 1 PER
$39.54
quality
HS50F20K Ohmite Wirewound 20K Ohm 1 50W 30ppm Resistor 1 PER
HS50F20K Ohmite Wirewound 20K Ohm 1 50W 30ppm Resistor 1 PER
$8.00
quality
Ohmite Little Devils VTG Resistors in Cabinet 5 lbs Loose Stackpole AB Vintage
Ohmite Little Devils VTG Resistors in Cabinet 5 lbs Loose Stackpole AB Vintage
$79.00
quality
OHMITE 1 Ohm 225 Watt Power Resistor Model 270 225P46 Tested In Exc Condit
OHMITE 1 Ohm 225 Watt Power Resistor Model 270 225P46 Tested In Exc Condit
$20.00
quality
Ohmite PFE5K1R60 Power Rib Resistor 160 OHM
Ohmite PFE5K1R60 Power Rib Resistor 160 OHM
$75.00
quality
OHMITE Memcor 5 Ohm 113 Watt Power Resistor RW37V5RO Tested In Exc Condition
OHMITE Memcor 5 Ohm 113 Watt Power Resistor RW37V5RO Tested In Exc Condition
$20.00
quality
Ohmite 50 Ohm Mil Spec Variable Resistor Part  RP251SD500KK
Ohmite 50 Ohm Mil Spec Variable Resistor Part RP251SD500KK
$24.95
quality
Ohmite 2312 POWR Rib 10 OHMS Resistor
Ohmite 2312 POWR Rib 10 OHMS Resistor
$55.00
quality
CARBON COMP RESISTORS 1 2 WATT 565000 OHMS OHMITE 565K OHMS LOT OF 5 NEW
CARBON COMP RESISTORS 1 2 WATT 565000 OHMS OHMITE 565K OHMS LOT OF 5 NEW
$1.96
quality
Ohmite L225J25R Vitreous Enameled Resistor 225 Watt 25 Ohm NEW
Ohmite L225J25R Vitreous Enameled Resistor 225 Watt 25 Ohm NEW
$6.50
quality
Ohmite Model 0962B Resistor 100 Watts 1500 Ohms New Old Stock
Ohmite Model 0962B Resistor 100 Watts 1500 Ohms New Old Stock
$19.99
quality
Ohmite Resistor L225J500
Ohmite Resistor L225J500
$7.00
quality
NEW OHMITE RESISTOR D225K25R 225W 25
NEW OHMITE RESISTOR D225K25R 225W 25
$7.00
quality
Ohmite Brown Devil 1844 Power Resistor 20K 20W USED
Ohmite Brown Devil 1844 Power Resistor 20K 20W USED
$6.99
quality
Ohmite 1747 Brown Devil Resistor 12W B 50 4KOHMS Box of 10 NEW
Ohmite 1747 Brown Devil Resistor 12W B 50 4KOHMS Box of 10 NEW
$10.99
quality
Ohmite 1747 Brown Devil Resistor 12W B 50 4KOHMS Sold Individually NEW
Ohmite 1747 Brown Devil Resistor 12W B 50 4KOHMS Sold Individually NEW
$3.99
quality
Ohmite L25J25RE Power Resistor 5 25W 25 Ohm NEW
Ohmite L25J25RE Power Resistor 5 25W 25 Ohm NEW
$4.99
quality
Ohmite H 1000 F2 375 Resistor USED
Ohmite H 1000 F2 375 Resistor USED
$19.99
quality
Ohmite Brown Devil Power Resistor 3K 12W USED
Ohmite Brown Devil Power Resistor 3K 12W USED
$3.99
quality
QTY 25 OHMITE 23J250 RESISTOR WIREWOUND 250 OHMS 3 WATTS NEW
QTY 25 OHMITE 23J250 RESISTOR WIREWOUND 250 OHMS 3 WATTS NEW
$10.00
quality
200 Ohm 12W Ohmite B12J200 Wirewound Power Resistor Ceramic Case 10B NEW
200 Ohm 12W Ohmite B12J200 Wirewound Power Resistor Ceramic Case 10B NEW
$5.95
quality
Ohmite Whe1K0Fet Through Hole Resistor Wirewound Whe Series Pack Of 10
Ohmite Whe1K0Fet Through Hole Resistor Wirewound Whe Series Pack Of 10
$27.57
quality
Ohmite Whd1R0Fet Through Hole Resistor Wirewound Whd Series Pack Of 10
Ohmite Whd1R0Fet Through Hole Resistor Wirewound Whd Series Pack Of 10
$27.26
quality
Ohmite Whe5K0Fet Through Hole ResistorWirewound Whe Series Pack Of 10
Ohmite Whe5K0Fet Through Hole ResistorWirewound Whe Series Pack Of 10
$23.98
quality
VINTAGE OHMITE DIVIDOHM 100W  9212 VAR RESISTOR NOSD100K1R0
VINTAGE OHMITE DIVIDOHM 100W 9212 VAR RESISTOR NOSD100K1R0
$12.95
quality
GE OHMITE Resistor Variable Wire Wound NON 750ohms 50WATTS MILSPEC NEW OLD ST
GE OHMITE Resistor Variable Wire Wound NON 750ohms 50WATTS MILSPEC NEW OLD ST
$44.99
quality
Ohmite 95J68Re Through Hole ResistorWirewound 95 Series 68 Ohm Pack Of 4
Ohmite 95J68Re Through Hole ResistorWirewound 95 Series 68 Ohm Pack Of 4
$27.73
quality
Ohmite Whd15Rfet Through Hole ResistorWirewound Whd Series Pack Of 10
Ohmite Whd15Rfet Through Hole ResistorWirewound Whd Series Pack Of 10
$24.08
quality
Ohmite Ta2K0Ph25R0Ke Resistor 25 Ohm 2Kw 10
Ohmite Ta2K0Ph25R0Ke Resistor 25 Ohm 2Kw 10
$265.41
quality
Ohmite Whe10Rfet Through Hole ResistorWirewound Whe Series Pack Of 10
Ohmite Whe10Rfet Through Hole ResistorWirewound Whe Series Pack Of 10
$27.57
quality
Ohmite Of224Je Through Hole ResistorCarbon Composition Pack Of 10
Ohmite Of224Je Through Hole ResistorCarbon Composition Pack Of 10
$23.05
quality
Ohmite Ta2K0Ph50R0Ke Resistor 50 Ohm 2Kw 10
Ohmite Ta2K0Ph50R0Ke Resistor 50 Ohm 2Kw 10
$265.41
quality
4pcs Ohmite Axial Wirewound Power Resistor 2K OHM 5 watt 5 30PPM C 25J2K0
4pcs Ohmite Axial Wirewound Power Resistor 2K OHM 5 watt 5 30PPM C 25J2K0
$5.75
quality
10 Ohmite Resistor 75K Ohm 2 Watts 5 RC42GF752J Carbon Comp
10 Ohmite Resistor 75K Ohm 2 Watts 5 RC42GF752J Carbon Comp
$8.73
quality
10 Ohmite Resistor 180K Ohm 1 2 Watt 10 Carbon Comp Resistor RC20GF184K
10 Ohmite Resistor 180K Ohm 1 2 Watt 10 Carbon Comp Resistor RC20GF184K
$7.58
quality
10 Ohmite Resistor 620K Ohm 1 2 Watt 5 Carbon Comp Resistor RC20GF624J
10 Ohmite Resistor 620K Ohm 1 2 Watt 5 Carbon Comp Resistor RC20GF624J
$6.37
quality
10 Ohmite Resistor 43K Ohm 1 Watt 5 Carbon Comp Resistor RC32GF433J
10 Ohmite Resistor 43K Ohm 1 Watt 5 Carbon Comp Resistor RC32GF433J
$8.04
quality
10 Ohmite Resistor 820K Ohm 1 Watt 5 Carbon Comp Resistor RC32GF824J
10 Ohmite Resistor 820K Ohm 1 Watt 5 Carbon Comp Resistor RC32GF824J
$8.23
quality
10 Ohmite Resistor 16 Ohms 1 Watt 5 Carbon Comp RC32GF160J
10 Ohmite Resistor 16 Ohms 1 Watt 5 Carbon Comp RC32GF160J
$8.23
quality
10 Ohmite Resistor 91 Ohm 1 Watt 5 Carbon Comp Resistor RC32GF910J
10 Ohmite Resistor 91 Ohm 1 Watt 5 Carbon Comp Resistor RC32GF910J
$7.50
quality
OHMITE 25 WATT RESISTOR L251500
OHMITE 25 WATT RESISTOR L251500
$2.99
quality
2 pcs B20J5R0 OHMITE AXIAL WIREWOUND RESISTORS 5 Ohm 20W 5 FREE SHIPPING
2 pcs B20J5R0 OHMITE AXIAL WIREWOUND RESISTORS 5 Ohm 20W 5 FREE SHIPPING
$5.99
quality
3 lot ohmite d225k25re 225w 25ohm wirewound resistors 10 1 2 long
3 lot ohmite d225k25re 225w 25ohm wirewound resistors 10 1 2 long
$39.69
quality
OHMITE 27050K40 270 50K 40 NO 0403 750OHMS 50W RESISTOR NEW
OHMITE 27050K40 270 50K 40 NO 0403 750OHMS 50W RESISTOR NEW
$7.35
quality
OHMITE 270 100M 40 270 175P 46 RESISTOR 25 OHMS 100W LOT OF 7GOOD
OHMITE 270 100M 40 270 175P 46 RESISTOR 25 OHMS 100W LOT OF 7GOOD
$29.99
quality
OHMITE 4842 11W8027 5000 OHM 11 W WIREWOUND RESISTOR
OHMITE 4842 11W8027 5000 OHM 11 W WIREWOUND RESISTOR
$2.95
quality
OHMITE 50 WATTS 15000 OHMS RESISTOR L50J15K NEW
OHMITE 50 WATTS 15000 OHMS RESISTOR L50J15K NEW
$9.50
quality
NEW OHMITE D225K1K0 1000OHM 225W RESISTOR D514150
NEW OHMITE D225K1K0 1000OHM 225W RESISTOR D514150
$11.53
quality
Mixed Lot of 2 Ohmite 2405 Resistor 175W 100  225W 50K  New
Mixed Lot of 2 Ohmite 2405 Resistor 175W 100 225W 50K New
$29.88
quality
Lot of 2 Ohmite 0913 Ceramic Power Resistor 225W 3K  New
Lot of 2 Ohmite 0913 Ceramic Power Resistor 225W 3K New
$29.88
quality
Ohmite L25J50R Resistor Power 50 OHM 25W Lot Of FOUR
Ohmite L25J50R Resistor Power 50 OHM 25W Lot Of FOUR
$22.00
quality
NEW OHMITE LOT OF 5 P N 51190024 059 RESISTOR
NEW OHMITE LOT OF 5 P N 51190024 059 RESISTOR
$9.99
quality
LOT 3 OHMITE IC900GA100L125AC M270 112N150 125OHM RESISTOR D518788
LOT 3 OHMITE IC900GA100L125AC M270 112N150 125OHM RESISTOR D518788
$10.46
quality
OHMITE D25K25R Adjustable 25 Ohms 25W Wirewound Resistor NOS
OHMITE D25K25R Adjustable 25 Ohms 25W Wirewound Resistor NOS
$9.95
quality
Ohmite L100J100 Power Resistor 100 Watt 100 Ohm New TB
Ohmite L100J100 Power Resistor 100 Watt 100 Ohm New TB
$11.95
quality
NIB OHMITE LUG RESISTOR C300K1R2
NIB OHMITE LUG RESISTOR C300K1R2
$13.99
quality
Ohmite 33 Ohm L12J3R3 Resistor
Ohmite 33 Ohm L12J3R3 Resistor
$8.00
quality
Ohmite L25J100 Resistor 100 Ohm Used
Ohmite L25J100 Resistor 100 Ohm Used
$7.00
quality
NEW Ohmite 825F200E 200 ohms 1 Resistor FREE SHIPPING
NEW Ohmite 825F200E 200 ohms 1 Resistor FREE SHIPPING
$5.99
quality
10 Ohmite Resistor 3K Ohm 1 Watt 5 Carbon Composition Resistor RC32GF302J
10 Ohmite Resistor 3K Ohm 1 Watt 5 Carbon Composition Resistor RC32GF302J
$7.76
quality
QTY 2 L25J150 OHMITE CHASSIS MOUNT WIREWOUND RESISTORS 150 Ohm 25W 5 LUG
QTY 2 L25J150 OHMITE CHASSIS MOUNT WIREWOUND RESISTORS 150 Ohm 25W 5 LUG
$9.99
quality
NEW Ohmite 825F250E 250 ohms 1 Resistor FREE SHIPPING
NEW Ohmite 825F250E 250 ohms 1 Resistor FREE SHIPPING
$5.99
quality
L25J15R OHMITE CHASSIS MOUNT WW RESISTORS 15 Ohm 25W 5 VITREOUS ENAMEL LUG
L25J15R OHMITE CHASSIS MOUNT WW RESISTORS 15 Ohm 25W 5 VITREOUS ENAMEL LUG
$6.99
quality
QTY 2 L50J2K0 OHMITE CHASSIS MOUNT WIREWOUND RESISTORS 2K Ohm 50W 5
QTY 2 L50J2K0 OHMITE CHASSIS MOUNT WIREWOUND RESISTORS 2K Ohm 50W 5
$12.99
quality
Ohmite Dividohm 25 0hm 50 Watt Resistor and a Jan Crystal 7135 khz
Ohmite Dividohm 25 0hm 50 Watt Resistor and a Jan Crystal 7135 khz
$9.50
quality
OHMITE 0400L VITREOUS ENAMELED RESISTOR 50W 3 OHMS L50J3R0 NIB
OHMITE 0400L VITREOUS ENAMELED RESISTOR 50W 3 OHMS L50J3R0 NIB
$9.98
quality
Ohmite Variable Power Resistor 1000 Ohm 50W D50K1K0 210 Series
Ohmite Variable Power Resistor 1000 Ohm 50W D50K1K0 210 Series
$10.00
quality
NEW 2Pk Ohmite M0917 RH 10 10W 2K ohms 1 Resistor FREE SHIPPING
NEW 2Pk Ohmite M0917 RH 10 10W 2K ohms 1 Resistor FREE SHIPPING
$8.99
quality
NEW Ohmite 850F1K0E 1K ohms 1 Resistor 50W FREE SHIPPING
NEW Ohmite 850F1K0E 1K ohms 1 Resistor 50W FREE SHIPPING
$5.99
quality
LOT OF 14  OHMITE 95J220 WIRE WOUND RESISTOR 220 OHM
LOT OF 14 OHMITE 95J220 WIRE WOUND RESISTOR 220 OHM
$18.00
quality
NEW IN BOX OHMITE 0568 50WATT 250 OHM RESISTOR
NEW IN BOX OHMITE 0568 50WATT 250 OHM RESISTOR
$9.99
quality
NEW OHMITE 0360 D25K1R0 25WATT 1 OHM RESISTOR
NEW OHMITE 0360 D25K1R0 25WATT 1 OHM RESISTOR
$10.50
quality
Ohmite D25K7R5 Resistor 25W 75 Ohm
Ohmite D25K7R5 Resistor 25W 75 Ohm
$36.97
quality
OHMITE D225K5K0 RESISTOR NEW IN A BOX
OHMITE D225K5K0 RESISTOR NEW IN A BOX
$15.00
quality
NEW OHMITE D100K1R0 100WATTS 1 OHM RESISTOR
NEW OHMITE D100K1R0 100WATTS 1 OHM RESISTOR
$15.80
quality
F311 75 F311 75 Ohmite New In Box 75 Ohm 30 Watt Thin Resistor F31175
F311 75 F311 75 Ohmite New In Box 75 Ohm 30 Watt Thin Resistor F31175
$1.09
quality
OHMITE CERAMIC RESISTORS 470N 100M 40 10R00J 9650 LOT OF 3
OHMITE CERAMIC RESISTORS 470N 100M 40 10R00J 9650 LOT OF 3
$7.00
quality
OHMITE Lug Resistor L225J100 225 watt 100 ohm
OHMITE Lug Resistor L225J100 225 watt 100 ohm
$17.99
quality
OHMITE RESISTOR  RW37V510 NSN 5905 00 835 7387 113W NOM RES51
OHMITE RESISTOR RW37V510 NSN 5905 00 835 7387 113W NOM RES51
$25.00
quality
NEW FACTORY SEALED OHMITE L25J3R0 RESISTOR
NEW FACTORY SEALED OHMITE L25J3R0 RESISTOR
$7.99
quality
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Ohmite Resistors

See More About:    Ohmite Resistor        
680V over OHMITE 100 ohm 225W resistor

The Test Methods and Experiences of 8 Resistors

1. Fixed Resistor Testing.

A. Connect the two probes(regardless of positive and negative) to the pins of resistors respecially, the actual resistance value will be measured. In order to improve the measurement accuracy, the measured resistance should be based on the size of the nominal value to select the range. As the scale of the nonlinear Ohm's block, dividing it in the middle of a more refined, pointer indicates the value should be possible to scale fell on the middle position, that is the start of full scale of 20% to 80% within the arc to make the measurements more accurate. According to a different level of resistance error. Reading between the nominal resistance were allowed ± 5%, ± 10% or ± 20% error. If we do not match, beyond the error range, then the resistance value change the value.

B. Note: When you are testing, particularly in the resistance measured over tens of kΩ resistor, hands do not touch the probe and resistance of the conductive part; be detected in the welding of the resistance from the circuit down, at least open a welding head, in order to avoid circuit The impact on other components of the test, resulting in measurement residual; the resistance value of color ring resistor can be able to determined by color ring marks, but is best to test the actual resistance using a multimeter.

2. Cement Resistance Testing.

Detection of resistance of cement and precautions to ordinary fixed resistor with the same test.

3. Fuse Resistors Test.

In the circuit, when the fuse resistor fuse open, you can make judgments based on experience: If it is found fuse resistors or charred black surface, it can be concluded that the overload rating of the current through it many times over due; If the surface without any trace of the open, it indicates that the current flow is equal to or just greater than the rated fuse value of sales. For the surface without any trace of the fuse resistor to judge good or bad, can make use of the multimeter to measure the R × 1 block, to ensure accurate measurement, it should fuse resistors from the circuit on one end of the next weld. If the measured resistance is infinite, then the fuse has failed open circuit resistor, if the measured resistance falls far short of the nominal value, that value of resistance change, we should not be used. In the maintenance of practice found that a small number of resistors in the circuit fuse is short breakdown phenomenon, attention should also be detected.

4. Potentiometer Detection.

Check the potentiometer, the first to turn the rotating handle, turn handle to see whether the smooth rotation, the switch is flexible, switch-pass, short "clicks" is crisp, and listen to the potentiometer and the resistance of the contact point within the body of friction sound, if any "imperfections" sound, indicating poor quality. Test with a multimeter, the first based on the size of the measured resistance of the potentiometer, the appropriate choice of a good multimeter resistance gear, and then according to the following method for testing.

A. Measured with a multimeter's ohm block "1" "2" at both ends, the reading should be nominal for the potentiometer resistance, such as the meter pointer does not move a lot of difference, or resistance, it indicates that the potentiometer is damaged.

B. Detect whether the activities of the potentiometer arm and the resistance of film contact is good or not. The ohm meter test block with "1" "2" ("2" "3") ends of the potentiometer shaft counterclockwise rotation to close the "off" position, when the resistance value as possible. Handle clockwise rotation axis and then slowly, the resistance value should be increased gradually, the pointer in the header should be a smooth move. When the spin axis of the handle to the extreme position of "3", the resistance should be close to the nominal value of the potentiometer. If the multimeter pointer handle potentiometer shaft rotation in the process of jumps, indicating active fault contacts are bad.

5. Positive Temperature Coefficient Thermistor (PTC) Detection.

When detecting, with a multimeter R × 1 block, concrete and two-step operation:

A. Room Temperature Testing (room temperature close to 25 ℃): the two probes touch the two pins PTC thermistors measure the actual resistance, and with the relative ratio of the nominal resistance, the difference between the two is the normal within the ± 2Ω. If the nominal resistance and the resistance of the actual difference is too large, then the performance is bad or damaged.

B. Heating Test: at room temperature, on the basis of the tests are normal, then a second step tests - heat detection, to a heat source (such as electric iron) near the PTC thermistor to its heating, while monitoring the resistance with a multimeter if the value increases with increasing temperature, and if so, that the normal thermal resistance, if resistance did not change, indicating that its performance became inferior and can not be used. Careful not to heat with the PTC thermistor by too close or direct contact with the thermistor in order to prevent their ruined.

6. Negative Temperature Coefficient Thermistor (NTC) Testing.

(1) Measured nominal resistance value Rt NTC thermistor with a multimeter measuring methods and measuring the same way as ordinary fixed resistor, which according to the nominal resistance of NTC thermistor select the appropriate power block can be directly measured actual Rt value. But NTC thermistor is sensitive to temperature, so the test should note the following:

A. Rt is the manufacturer at an ambient temperature measured at 25 ℃, so the Rt measured with a multimeter when the ambient temperature should also be close to 25 ℃, in order to ensure the credibility of the test.

B. Measurement of power shall not exceed the specified value, so that the current measurement error caused by thermal effects.

C. It is operating correctly. Test, and hold your hands to prevent the body temperature of the test impact.

(2) Estimate the temperature coefficient "at"

First measured the value of t1 resistance Rt1 at room temperature, then electric soldering iron for heat, close to the thermistor Rt, measure the resistance RT2, also measured with a thermometer at this time the surface of the thermistor RT and then calculated the average temperature t2.

7. Varistor Testing.

R × 1k with a multimeter to measure the varistor block between the two pins is, the reverse insulation resistance, are infinite, otherwise, that leakage current. If the measured resistance is very small, indicating varistor is damaged, can not be used.

8. Photosensitive Resistance Testing.

A. With a black piece of paper to cover the window light sensitive resistor, when the multimeter pointer remained fixed, the resistance approaches infinity. This value shows the bigger the better performance of photosensitive resistance. If this value is very small or close to zero, indicating photoresistor has burn damage, can not continue to use.

B. Will be a light transmittance of the window aligned photosensitive resistance, when the multimeter pointer swing should be more substantial, more resistance was significantly reduced. The smaller this value the better the performance that photosensitive resistance. If this value is large or even infinite, indicating that the resistance of the internal open-photosensitive damage, can no longer continue.

C. The photosensitive resistor light window light rays aligned with the black pieces of paper on top of the window shade photoresistors shaking, it stopped by the light, this time with the black pieces of paper multimeter pointer should be shaking and side to side. If the meter pointer position does not always stop with the paper in a rock and swing, indicating resistance of the photosensitive photosensitive materials have been damaged.

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