Multi-tube Rotometers/Gas Proportioning Rotometers

FL-1,2,3,4,5,6,7,8GP

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•	±2%FS Accuracy
•	Back Pressure Compensated for Accurate Blending
•	Blend Up To Three Gases
•	Save on Cost of Custom Gas Mixtures
•	Vary Concentrations With Operating System
•	For Use With 150 mm Flow Tubes
•	Bench Mount Tripod Base Optional
•	Standard 6-Turn Valves or Precision 16-Turn Valves Available
View related products - Variable Area Flowmeters, Rotameters & Switches

To blend two or three gases in homogeneous infinitely variable concentrations, directly at the end use point, these rotameters are unsurpassed in convenience and economy. Gas proportioning rotameters pay for themselves in a short period of time since their use eliminates the need for expensive custom blended gas mixtures from outside sources. This series of rotameters lend flexibility and economy to the efficient utilization of component gas cylinders and piped in supply lines. Another significant advantage in laboratory use is the freedom to reproducibly increase or decrease concentrations during the course of an experiment.

The flowrates of component gases are not affected by downstream pressure variations as long as back pressures do not exceed or approach the input pressure.

150 mm Flowtube, Gas Flow Capacities of Routine Gases
Ranges in cc/min, flowtubes have 10:1 range

Model No.	Valve Type	End Fittings
Models for 2 Flow Tubes
*FL-1GP-()-()*	Standard	Aluminum
*FL-2GP-()-()*	Precision	Aluminum
*FL-3GP-()-()*	Standard	316 SS
*FL-4GP-()-()*	Precision	316 SS
Models for 3 Flow Tubes
*FL-5GP-()-()-()**	Standard	Aluminum
*FL-6GP-()-()-()**	Precision	Aluminum
*FL-7GP-()-()-()**	Standard	316 SS
*FL-8GP-()-()-()**	Precision	316 SS

*Specify flow tube and float from flowtube table at right.

Float Materials:
G = black glass
SA = sapphire
ST = 316 SS
C = carboloy
T = tantalum

SPECIFICATIONS
Accuracy: ±2% FS, from 10% to 100% of scale
Repeatability: ±0.25% FS
Max Pressure: 200 psig
Max Temperature: 250°F (180°F for water)
Flow Tube: Borosilicate glass
End Fittings: Black and anodized aluminum or 316 SS
Packing and O-Rings: Buna in aluminum models, FKM -A in 316 SS models
Side Panels: Black anodized aluminum
Connections: 1/8 FNPT

Tube No.	Air	H₂O	Argon	CO₂	He	H₂	N₂	O₂
45G	19	0.196	15	23	16	37	20	17
45SA	30	0.392	24	37	26	59	31	27
45ST	60.6	0.94	49	72	53	123	62	54
45C	110	1.91	90	127	101	232	114	99
45T	121	2.13	99	139	112	256	125	109
41G	49	0.49	44	56	46	94	48	42
41SA	73	0.98	60	84	69	149	76	70.4
41ST	143	2.34	113	150	133	301	143	131
41C	247	4.7	202	251	260	567	255	228
41T	264	5.1	222	263	288	602	274	244
61G	93	0.9	75.6	103	90	208	92	81
61C	444	8.5	373	445	519	1120	462	407
61T	484	9.2	393	470	555	1225	495	433
02G	374	5.5	305	355	450	1021	382	340
02SA	513	10.0	429	472	681	1497	520	472
02ST	814	20.4	676	728	1290	2496	824	753
02C	1222	33.7	1020	1072	2221	3876	1220	1131
02T	1331	36.1	1085	1134	2356	4257	1310	1206
03G	844	16.5	687	725	1490	2620	827	772
03SA	1093	26.1	910	944	2059	3546	1110	1024
03ST	1682	44.6	1380	1420	3397	5547	1662	1545
03C	2423	70.5	1996	2039	5120	8170	2405	2246
03T	2576	75.6	2131	2163	5437	8717	2575	2364
04G	2313	54	1949	2048	4880	7817	2395	2169
04SA	3079	78	2605	2620	6458	10,455	3142	2860
04ST	4562	133	3903	3990	9770	15,855	4685	4341
04C	6621	201	5665	5743	14,500	22,790	6845	6307
04T	6932	212	6040	6018	15,420	24,252	7080	6690
05G	3922	84	3151	3374	7803	13,105	3868	3485
05SA	5188	126	4175	4388	10,336	16,108	5090	4652
05ST	7825	217	6384	6308	15,960	27,804	7722	6992
05C	11,154	329	9460	9222	23,509	37,553	10,973	10,082
05T	11,965	353	9627	9475	25,131	39,998	11,628	10,741
39G	8678	210	7366	7485	19,426	29,840	8916	8269
39SA	11,357	306	9539	9557	25,400	40,006	11,524	10,706
39ST	16,737	506	14,131	14,051	38,576	59,995	17,021	15,710
39C	23,752	747	20,166	19,854	56,220	83,052	24,071	22,432
39T	25,252	790	21,414	21,115	60,596	90,410	25,709	23,790
40G	23,742	541	19,761	18,989	53,100	85,812	23,512	21,350
40SA	30,711	806	24,563	23,855	70,100	110,100	29,930	27,181
40ST	45,227	1288	35,300	34,287	103,647	159,699	43,000	39,567
40C	66,346	1881	47,890	46,311	146,500	221,872	59,580	54,902
40T	69,940	2001	51,997	49,009	189,826	234,423	63,826	57,960

To Order (Specify Model Number)

Part Number	Availability	Price	Description	RoHS	Qty.

Sample Configurations - Please consult Flow Engineering for Specific Models

FL-1GP-45G-45G	4 Weeks	$426.00	Two tubes, standard valve, aluminum end fittings; two 19 cc/min (air) tubes		qty.

FL-1GP-45G-45ST	4 Weeks	$426.00	Two tubes, standard valve, aluminum end fittings; one 19 cc/min (air) tube and one 60.6 cc/min (air) tube		qty.

FL-2GP-41G-41G	4 Weeks	$477.00	Two tubes, precision valve, aluminum end fittings; two 49 cc/min (air) tubes		qty.

FL-2GP-45ST-45ST	3 Weeks	$477.00	Two tubes, precision valve, aluminum end fittings; two 60.6 cc/min (air) tubes		qty.

FL-4GP-03ST-03ST	3 Weeks	$673.00	Two tubes, precision valve, 316 SS end fittings; two 1682 cc/min (air) tubes		qty.

† All dollar amounts on this site are shown in US currency.

Note: Comes complete with correlation table for each tube and instruction sheet.

Select the desired 150mm flow tube from those listed, delete the FLT-prefix and insert the remaining suffix from the flow tube into the model numbers.

For NIST calibration, add suffix "-NIST AIR" to model number, add $225 per tube, per gas, per float to the price. Add suffix "-NIST WATER" to model number and $275 per tube to the price.

Ordering example: FL-5GP-61G-41SA-03C calls out a gas proportioner for three gasses with standard valves and aluminum end fittings with tubes FLT-61G, FLT-41SA, and FLT-03C installed, $365 + 70 + 70 + 70 = $575.00 U.S.

Related Links - Related Products

Related Products

	FLT Series:
	ACCESSORY FLOWTUBES For Use with FL-3000 Series Rotameters, Multitube Assemblies and Gas Proportioners

Keywords:Multi-tube Rotometers/Gas Proportioning Rotometers, single phase ac drives