Test Method: ASTM D892
Liquid Baths for Foam Testing
• Meet the requirements of ASTM D892 or D6082 test ....methods
• Temperature stability better than ±0.5°C
• Semi automated sequencer model available
- HEATED AIR baths for Foam Testing
- Diffuser Certification Apparatus
- Diffuser Stone Re-Certification Service
- Foam Test Cylinder Cleaning Apparatus
- Exit Air Totalizer
- Automated Foam Test Sequencer
 - Upgrade YOUR Existing Foam Test Bath

Model 24 dual foam test bath is the traditional arrangement with two glass jars mounted on a supporting base. Each jar accepts two, 1 liter test cylinders for ASTM D892, Sequences I, II and III testing. One bath is typically controlled at 24°C and the other for 93.5°C with stability of better than ±0.5°C. Four, floating ball flow meters are provided with micro valves for precision adjustment of air to flow at 94 ±5 ml/min. Model 24 is provided with a 4 position rack supporting 4 test cylinders when out of the bath.

Model 28 is similar to Model 24 but upgraded for semi automated operation for increased precision and operator assistance. It is equipped with a two channel automated sequencer, a two channel mass flow controller, and four temperature probes for the measurement of the sample temperatures.

The two channel automated sequencer automatically starts the air flow after the required 5 minutes of gas diffuser stone in the test sample, stops the air flow after 5 minutes, signals the operator to view the foam height, and after 10 minutes again signals the operator to again observe the collapsed foam level. The two channel mass flow controller accurately measures and controls the air flow to the test samples at 94 ml/min ±5 ml/min..

A touch screen allows the operator selection and full adjustment and calibration of all test parameters. All key test parameters (temperature, air flow, time, etc.) are displayed during the test. Also displayed is the time remaining to the next test event requiring operator attention.

Model 12L two position test bath is same as Model 24 but only a single test jar and only two floating ball flow meters. This model is for 24º C only.

Model 12HL two position test bath is the same as Model 12L, but with the addition of a clear plastic heat shield handles 93.5ºC 

Model 296 high temperature foam test liquid bath is a safer way to perform ASTM D892 as well as D6082 test methods. The glass jar holding the heated liquid bath medium is enclosed in an insulated stainless steel cabinet with a multipane insulated viewing window. The jar enclosure is engineered to protect the operator by containing the hot bath fluid in the event of jar breakage.

The illuminated jar holds two, 1 liter test cylinders. The air flow is measured by two, ball in glass tube flow meters (one for each test position) and adjustable by micro precision valves to a flow rate from 90 to 200 ±5 ml/min. The bath medium temperature control is provided by a digital indicating PID controller with 0.1°C resolution. The temperature stability is better than ±0.5°C over the operating range of 90° to 150°C.

For safety all models are supplied with a four position, stainless steel storage/support rack is provided for holding the hot test cylinders after removal from the bath.

 Available Models
Model No.
No. of Baths
Temperature Range
Test Positions
Foam Sequnce
Cabinet Dimensions
Ship Weight lbs/cu.ft
12L
1
+24ºC
2
I + III
14x16x26
(35x40x65)
125/12
12HL
1
+24ºC or +93.5ºC
2
I + II + III
14x16x26
(35x40x65)
125/12
24
2
+24ºC or +93.5ºC
2 + 2
I + II + III
33x16x33
(83x40x65)
210/23
28
2
+24ºC or +93.5ºC
2 + 2
I + II + III
33x16x33
(83x40x65)
225/23
296
1
+24ºC to +150ºC
2
II + D6082
26x19x29
(65x48x73)
250/16


Model: FM-6
Test Tube Support Rack
Model: FM-16
Chiller
Model: FM14/15
Air Supply Assembly
& Air Drying Tower
Model: FM 20
Model: 296

Accessories
Part No.
Description
FM-1
Flat bottomed glass 100mL graduated test cylinder starting at 10mL and continuing at 10mL increments
FM-3MC
Certified Mott metal cylinder gas diffuser
FM-3NC

Certified Mott metal cylindrical gas diffuser (more uniform air bubbles and greater precision than Norton)
FM-4
Test assembly includes 1 of each:
FM-1 - 100mL graduated test cylinder
FM-3 - Mott metal cylindrical gas diffuser
FM-10 - glass air-outlet tube
FM-11 - air-inlet tube
FM-12 - sealing washer
FM-13 - two hole rubber stopper
FM-5
 Four position sample storage rack (cylinders not included)
FM-6
 Foam Test Tube Support Rack
FM-7.2
 Two channel digital indicating Mass Flow Controller, allowing two simultaneous foam tests
FM-9
 Automatic-sequencing controller, automatically starts air flow after the 5 minute period of soaking the diffuser, sounds alarm and automatically stops air flow after 5 minutes blowing period, and sounds alarm after 10 minute settling period. Also provided is a digital display time counter showing remaining seconds to the next even requiring operator attention. Available as a stand alone model or incorporated into any of the foam testing baths.
FM-10
 Glass air-outlet tube (90º)
FM-11
 Chrome plated air-inlet tube
FM-12
 Sealing washer (for between inlet tube and diffuser)
FM-13
 Rubber stopper (two holes)
FM-14
 Air drying tower package with color indicating drying agent, 3" diameter by 12" tall
FM-15
 Air supply pump (oil-less diaphragm)
FM-14/15
 Air supply assembly mounted on a base with as air supply pump (FM-15) and with an air drying tower (FM-14). Overall dimensions: 9"x10"x14"
FM-16
 Mechanically refrigerated bath (12 liters) with a digital indicating controller. Operating temperature range is +10ºC to -35ºC. Designed for pumping cold liquid to cool Model 323 or323-H air foam bath. It allows Model 323 to operated at 24ºC as well as rapidly cool the air chamber to the lower temperature.
Overall dimensions: 14"x23"33"
FM-16L
 Flow cooler (used with Model 24 and 28 liquid baths). It is used to maintain the 24ºC bath when the ambient temperature in the laboratory is above 24ºC.
-17
 20 liters (5gal.) of Polyalphaolefin (PAO) bath medium oil, containing no silicones. PAO fluid has longer life at higher temperatures then conventional bath medium oils. 27 liters (7 gal.) need to fill each liquid bath. Replaces silicones as heated bath medium. Silicone fluids are not recommended. Even low levels (1 ppm and above) of silicone contamination interfere with test results.
FM-20
 For improved consistency of results, two digital indicating mass flow controllers are used for precisely measuring and controlling the amount of air delivered to the air diffuser. The air flow is controlled at either a rate of 94 or 200 ±mL/min. (depending if the testing by ASTM D892 or D6082, respectively). An automated, two channel sequencer automatically starts the air flow after the 5 minutes soak times, after the 6 minutes stops the air flow and sounds an alarm, and again sounds an alarm after the 10 minutes settling period (other times are also available). A touch screen allows the operator selection and full adjustment of all test parameters. All key parameters are displayed during the test. Also displayed is the time remaining to the next event requiring operator attention.
Specifications subject to change without notice.

Specifications subject to change without notice. Lawler Manufacturing Corporation © 2011