Usage Guidelines
Please Note:

• Some Ernst Instrument products are comparable but not direct replacements.
• Some Ernst Instruments items are alternates with the same form, fit and function, but not exact equals to all EFI items. Inquire if an exact equal is needed.
• Certifications and other requirements, such as CRNs, inquire with Sales Team prior to placing Orders.

Hint: Use CTRL + F to quickly find the number you are cross-referencing!

Glass & Gaskets

ERNST INSTRUMENTS SERIES #	EFI - ERNST FLOW INDUSTRIES SERIES #	JOHN C. ERNST CO PART NUMBERS	NOTES
G11-505	CLEAR 500	505
G11-506	501 RED	506
G11-507	CLEAR HEAVY 600	507
G11-508	HEAVY 601 RED	508
G11-522	EFI-160TP	522
G18-551	66-RW	551
G18-591	Brass Washers	591
G18-553	99-GW	553

Clear Flat Gauge Glass

ERNST INSTRUMENTS SERIES #	EFI - ERNST FLOW INDUSTRIES SERIES #	JOHN C. ERNST CO PART NUMBERS	NOTES
G14-546	CA-1, CA-2, CA-3, CA-4, CA-5, CA-6, CA-7, CA-8, CA-9	546-1, 546-2, 546-3, 546-4, 546-5, 546-6, 546-7, 546-8, 546-9

Clear HP Flat Gauge Glass

ERNST INSTRUMENTS SERIES #	EFI - ERNST FLOW INDUSTRIES SERIES #	JOHN C. ERNST CO PART NUMBERS	NOTES
G14-547	CA-1-T, CA-2-T, CA-3-T, CA-4-T, CA-5-T, CA-6-T, CA-7-T, CA-8-T, CA-9-T	547-1, 547-2,547-3, 547-4, 547-5, 547-6, 547-7, 547-8, 547-9
G14-545	Reflex Flat Gauge Glass, RB-1, RB-2, RB-3, RB-4, RB-5, RB-6, RB-7, RB-8, RB-9	545-1, 545-2, 545-3, 545-4, 545-5, 545-6, 545-7, 545-8, 545-9
G15	Gaskets For Flat Gauge Glass, EFI-44	585, 588, 595	Ernst Instruments Gaskets are 1/16" Thick
G15B-	Gaskets for 1" Wide Flat Gauge Glass	585, 588, 595
G15-592	MICA Shields for Flat Gauge Glass	592
G16-852	EFI-734BC	852
G16-850	EFI-734/690Q19	850

Tubular Level Gauge Accessories

ERNST INSTRUMENTS SERIES #	EFI - ERNST FLOW INDUSTRIES SERIES #	JOHN C. ERNST CO PART NUMBERS	NOTES
T18-840	EFI-RCP	840-

Sight Flows

ERNST INSTRUMENTS SERIES #	EFI - ERNST FLOW INDUSTRIES SERIES #	JOHN C. ERNST CO PART NUMBERS	NOTES
S13T-	SERIES 1400 THREADED, EFI-1420, EFI-1430, EFI-1470, EFI-1422, EFI-1432, EFI-1472, EFI-1421, EFI-1431, EFI-1471, EFI-1471, EFI-1423, EFI-1433, EFI-1473	020, 130, 170, 021, 131, 171, 022, 132, 172, 023, 133, 173
S13F-	SERIES 1400 FLANGED, EFI-1420-F, EFI-1470-F, EFI-1422-F, EFI 1472-F, EFI-1421-F, EFI-1471-F, EFI-1423-F, EFI-1473-F	050, 270, 051, 271, 052, 272, 053, 273
S14FB- Plain	EFI-910-FA (NF)	200 , 240, 260
S14FB- Flapper	EFI-910-FA	202, 242, 262
S14FB- Rotor	EFI-935-FA	201, 241, 261
S14FB- Drip Tube	EFI-608-FA	203, 243, 263
S12B- Flapper	EFI-100-S	102-
S12B- Rotor	EFI-300-S	101-
S12B- Drip Tube	EFI-200-S	103-
S14TC-	SERIES 2000 Threaded	9 L, 060 L, 013 L, 063 L, 012 L, 062 L, 011 L, 061 L
	EFI-20-00-T, EFI-20-10-T, EFI-20-20-T, EFI-20-30-T
S14FC-	SERIES 2000 Flanged	200 L, 260 L, 203 L, 263 L, 202 L, 262 L, 201 L, 261 L
	EFI-20-40-F, EFI-20-50-F, EFI-20-60-F, EFI-20-70-F
S22C-	EFI 4000-S	108, 128, 158
S22B-	EFI 265	149-1, 149-2, 149-3
S21F-	EFI GY-FL	220, 221, 222, 223
S21T-	EFI GY	120, 121
S27T	EFI 57
S27F	EFI 215

Carbon Steel Gauge Valves

ERNST INSTRUMENTS SERIES #	EFI - ERNST FLOW INDUSTRIES SERIES #	JOHN C. ERNST CO PART NUMBERS	NOTES
V11B-450	EFI-333J, EFI-334J, EFI-335J, EFI-336J, EFI-323J, EFI-324J, EFI-325J, EFI-326J	450
V11B-460	EFI-433J, EFI-434J, EFI-435J, EFI-436J, EFI-423J, EFI-424J, EFI-425J, EFI-426J	460

Armored Gauges

ERNST INSTRUMENTS SERIES #	EFI - ERNST FLOW INDUSTRIES SERIES #	JOHN C. ERNST CO PART NUMBERS	NOTES
H13B-R	EFI S	480-R11, 480-R12, 480-R13, 480-R14, 480-R15, 480-R16, 480-R17, 480-R18, 480-R19, 480-R24, 480-R25, 480-R26, 480-R27, 480-R28, 480-R29, 480-R36, 480-R37, 480-R38, 480-R39, 480-R47, 480-R48, 480-R49
	EFI-S-1100J, EFI-S-1101J, EFI-S-1102J, EFI-S-1103J, EFI-S-1104J, EFI-S-1104J, EFI-S-1105J, EFI-S-1106J, EFI-S-1107J, EFI-S-1108J, EFI-S-1123J, EFI-S-1124J, EFI-S-1125J, EFI-S-1126J, EFI-S-1127J, EFI-S-1128J, EFI-S-1145J, EFI-S-1146J, EFI-S-1147J, EFI-S-1148J, EFI-S-1166J, EFI-S-1167J, EFI-S-1168J, EFI-S-56J, EFI-S-57J, EFI-S-58J
H13B-T	EFI ST	490-T11, 490-T12, 490-T13, 490-T14, 490-T15, 490-T16, 490-T17, 490-T18, 490-T19, 490-T24, 490-T25, 490-T26, 490-T27, 490-T28, 490-T29, 490-T36, 490-T37, 490-T38, 490-T39, 490-T47, 490-T48, 490-T49
	EFI-ST-1200J, EFI-ST-1201J, EFI-ST-1202J, EFI-ST-1203J, EFI-ST-1204J, EFI-ST-1205J, EFI-ST-1206J, EFI-ST-1207J, EFI-ST-1208J, EFI-ST-1223J, EFI-ST-1224J, EFI-ST-1225J, EFI-ST-1226J, EFI-ST-1227J, EFI-ST-1228J, EFI-ST-1245J, EFI-ST-1246J, EFI-ST-1247J, EFI-ST-1248J, EFI-ST-1266J, EFI-ST-1267J, EFI-ST-1268J, EFI-ST-56J, EFI-ST-57J, EFI-ST-58J
H14B-T	EFI WT	491-T11, 491-T12, 491-T13, 491-T14, 491-T15, 491-T16, 491-T17, 491-T18, 491-T19, 491-T24, 491-T25, 491-T26, 491-T27, 491-T28, 491-T29, 491-T36, 491-T37, 491-T38, 491-T39, 491-T47, 491-T48, 491-T49
	EFI-WT-10J, EFI-WT-11J, EFI-WT-12J, EFI-WT-13J, EFI-WT-13J, EFI-WT-14J, EFI-WT-15J, EFI-WT-16J, EFI-WT-17J, EFI-WT-18J, EFI-WT-23J, EFI-WT-24J, EFI-WT-25J, EFI-WT-26J, EFI-WT-27J, EFI-WT-28J, EFI-WT-35J, EFI-WT-36J, EFI-WT-37J, EFI-WT-38J, EFI-WT-46J, EFI-WT-47J, EFI-WT-48J, EFI-WT-56J, EFI-WT-57J, EFI-WT-58J
H11B-T	EFI-12-WJ	492-T11, 492-T12, 492-T13, 492-T14, 492-T15, 492-T16, 492-T17, 492-T18, 492-T19, 492-T24, 492-T25, 492-T26, 492-T27, 492-T28, 492-T29, 492-T36, 492-T37, 492-T38, 492-T39, 492-T47, 492-T48, 492-T49, 497-T11, 497-T12, 497-T13, 497-T14, 497-T15, 497-T16, 497-T17, 497-T18, 497-T19, 497-T24, 497-T25, 497-T26, 497-T27, 497-T28, 497-T29, 497-T36, 497-T37, 497-T38, 497-T39, 497-T47, 497-T48, 497-T49
	EFI-1200WJ, EFI-1201WJ, EFI-1202WJ, EFI-1203WJ, EFI-1204WJ, EFI-1205WJ, EFI-1206WJ, EFI-1207WJ, EFI-1208WJ, EFI-1223WJ, EFI-1224WJ, EFI-1225WJ, EFI-1226WJ, EFI-1227WJ, EFI-1228WJ, EFI-1245WJ, EFI-1246WJ, EFI-1247WJ, EFI-1248WJ, EFI-1266WJ, EFI-1267WJ, EFI-1268WJ
H11B-R	EFI-12-WJ	482-R11, 482-R12, 482-R13, 482-R14, 482-R15, 482-R16, 482-R17, 482-R18, 482-R19, 482-R24, 482-R25, 482-R26, 482-R27, 482-R28, 482-R29, 482-R36, 482-R37, 482-R38, 482-R39, 482-R47, 482-R48, 482-R49, 487-R11, 487-R12, 487-R13, 487-R14, 487-R15, 487-R16, 487-R17, 487-R18, 487-R19, 487-R24, 487-R25, 487-R26, 487-R27, 487-R28, 487-R29, 487-R36, 487-R37, 487-R38, 487-R39, 487-R47, 487-R48, 487-R49
	EFI-1200WJ, EFI-1201WJ, EFI-1202WJ, EFI-1203WJ, EFI-1204WJ, EFI-1205WJ, EFI-1206WJ, EFI-1207WJ, EFI-1208WJ, EFI-1223WJ, EFI-1224WJ, EFI-1225WJ, EFI-1226WJ, EFI-1227WJ, EFI-1228WJ, EFI-1245WJ, EFI-1246WJ, EFI-1247WJ, EFI-1248WJ, EFI-1266WJ, EFI-1267WJ, EFI-1268WJ
H19	EFI FG904, EFI FG905, EFI FG906, EFI FG907, EFI FG908, EFI FG909, EFI FG966, EFI FG977, EFI FG988, EFI FG999

Armor Level Gauge Accessories

ERNST INSTRUMENTS SERIES #	EFI - ERNST FLOW INDUSTRIES SERIES #	JOHN C. ERNST CO PART NUMBERS	NOTES
EPL-100	EFI LEVELITE	816 EPL
	EPL-

Magnetic Level Gauges

ERNST INSTRUMENTS SERIES #	EFI - ERNST FLOW INDUSTRIES SERIES #	JOHN C. ERNST CO PART NUMBERS	NOTES
F21	EFI-MINI-MAGNA	048
F11	EFI-MAGNA	049

Sight Windows

ERNST INSTRUMENTS SERIES #	EFI - ERNST FLOW INDUSTRIES SERIES #	JOHN C. ERNST CO PART NUMBERS	NOTES
W11-WN	Welding Neck	311, 351
	EFI-W-5000
W12	Welding Pad	312, 352	Inquire if CRN Needed
	EFI-5200
W11-FN	Threaded Connection
	EFI-S5100

Threaded Sight Windows

ERNST INSTRUMENTS SERIES #	EFI - ERNST FLOW INDUSTRIES SERIES #	JOHN C. ERNST CO PART NUMBERS	NOTES
W16-LP	Low Pressure	341
	EFI-540, EFI-540S
W16-MF	Low Pressure Fused	322
	EFI-1260, EFI-1260BR
W16-MP	Medium Pressure	316
	EFI-S5400
W16-HF	High Pressure	722
	EFI-HPSP

Glass

ERNST INSTRUMENTS SERIES #	EFI - ERNST FLOW INDUSTRIES SERIES #	JOHN C. ERNST CO PART NUMBERS	NOTES
G13-540	Low Pressure Annular Edge Glass	540M-1, 540M-2, 540M-3, 540M-4, 540M-5
	AE695620, AE695610, AE692540, AE694790, AE694800
G13-541	High Pressure Annular Edge Glass	541M-1, 541M-2, 541M-3, 541M-4, 5401M-5
	AE695621, AE695611, AE692541, AE694791, AE694801
G12-	Borosilicate Rectangles & Circles	530, 531, 538, 539, 532, 533
	EFI-S-2130, EFI-C-2140, EFI-S-2130 BLUE, EFI-C-2140 BLUE
W14-	EFI SAFEPORT	501
	EFI-SP

Tubular Gauge Valves

ERNST INSTRUMENTS SERIES #	EFI - ERNST FLOW INDUSTRIES SERIES #	JOHN C. ERNST CO PART NUMBERS	NOTES
T11	EFI-0000, EFI-00000, EFI-00316, EFI-00316, EFI-23-651, EFI-23-654, EFI-29, EFI-3, EFI-581-1L, EFI-581-1L, EFI-6155, EFI-7-1/2, EFI-L-150E, EFI-L-150E	401-04, 401-03, 440-04, 440-05, 448-04, 448-05, 407-04, 405-04 NA, 405-05 NA, 407-05, 405-04, 405-05
T12	EFI-36A, EFI-37A
T14	EFI-23-350, EFI-23-353	436-04, 436-05
T16	EFI-203J, EFI-204J, EFI-206J, EFI-243J, EFI-244J, EFI-245J, EFI-246J, EFI-205J, EFI-206N-Inclined	430-04, 432-04, 432-05, 430-05
T17	EFI SG854, EFI SG855, EFI SG860
T19	EFI-402RS, EFI-403RS, EFI-450-FV, EFI-450-SFI, EFI-450-SI, EFI-450-SV, EFI-450-SV, EFI-503RAS
T20	EFI-31A, EFI-31AL, EFI-34, EFI-34A, EFI-34AL

Brass Air Cocks

ERNST INSTRUMENTS SERIES #	EFI - ERNST FLOW INDUSTRIES SERIES #	JOHN C. ERNST CO PART NUMBERS	NOTES
R11		701, 702, 703, 704
R12	EFI 6, EFI 7, EFI 63T, EFI 64T, EFI 8, EFI 12, EFI 13, EFI 14, EFI 15, EFI 26, EFI 27, EFI 52, EFI 53, EFI 54, EFI 54A, EFI 55, EFI 56, EFI 57A, EFI 81L