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Model 3785 |
Model 3786 |
Model 3781 |
| Minimum Detectable Range |
5 nm, verified with DMA classified ambient and sucrose particles |
2.5 nm, verified with DMA classified particles |
6 nm, verified with DMA classified sucrose |
| Maximum Detectable Range |
> 3 um |
> 3 um |
> 3 um |
| Particle Concentration Range (Single) |
0 to 30,000 particles/cm^3 nominally (continuous, live time coincidence corrected) |
0 to 100,000 particles/cm^3 single particle counting with continuous live time coincidence correction |
0 to 500,000 particles/cm^3, single particle counting with continuous live time coincidence correction |
| Particle Concentration Range (Photo) |
100,000 to 10,000,000 particles/cm^3 |
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| Particle Concentration Accuracy |
+/- 10% at < 20,000 particles/cm^3 |
+/- 12% at < 100,000 particles/cm^3 |
+/- 10 % at 500,000 particles/cm^3 |
| Response Time |
< 2 seconds to 95% in response to step change |
< 2 seconds to 95% in response to step change |
< 2 seconds to 95% in response to concentration step change |
| Aerosol Flow Rate |
1.0 +/- 0.1 L/min |
0.3 L/min (nominal) |
0.12 +/- 0.012 L/min |
| Flow Source |
Internal diaphragm pump. May be operated with an external vacuum and critical orifice, but requires change to internal plumbing (Consult TSI for details) |
Two internal diaphragm pumps |
Internal diaphragm pump; option to use an external vacuum source |
| Sheath Flow Rate |
N/A |
0.3 +/- 0.03 L/min |
N/A |
| Total Flow Rate |
N/A |
0.6 +/- 0.03 L/mim |
N/A |
| Flow Control |
Internal pump controlled to calibrated pressure drop accross orifice with inlet pressure correction |
Two internal pumps controlled to calibrated pressure drop across orifices with inlet pressire correction |
Sensor feedback controlled with absolute pressure correction, transport bypass lever allows direct measure of aerosol flow rate 0.6 +/- 0.12 L/min |
| Purge Flow |
0.035 L/min |
N/A |
N/A |
| Inlet Flow |
(Aerosol + purge) 1.035 L/min |
N/A |
0.6 +/- 0.12 L/min |
| False Background Counts |
< 0.001 particle/cm^3, 1 hour average |
< 0.01 particle/cm^3, 1 hour average |
< 0.01 particle/cm^3, 1 hour average |
| Aerosol medium |
Air only, 10 to 40C (50 to 104 F) |
Air only, 10 to 35C (50 to 95F) |
Air only, 10 to 35C (50 to 95F) |
| Ambient Temperature Range |
10 to 40C (50 to 104F) |
10 to 35C (50 to 95F) |
10 to 35C (50 to 95F) |
| Ambient Humidity Range |
0 to 90% RH, noncondensing |
0 to 90% RH, noncondensing |
0 to 90% RH, noncondensing |
| Inlet Pressure Operation (absolute) |
50 to 110 kPa (0.5 to 1.1 atm) |
50 to 110 kPa (0.5 to 1.1 atm) |
50 to 110 kPa (0.5 to 1.1 atm) |
| Inlet Pressure (gauge) |
+/- 2.5 kPa (+/- 10 in. of water) |
+/- 2.5 kPa (+/- 10 in. of water) |
0 to 2.5 kPa (0 to 10 in. of water) |
| Condensing Liquid |
water (distilled water recommended) |
water (distilled water recommended) |
water (distilled water recommended) |
| Filling System |
Internal liquid injection pump with water recycling capability, source water container located externally |
Internal liquid injection pump with water recycling capability, source water container located externally |
Reservoir fed by gravity from external bottle via fill valve, controlled by floate switch. Internal reservoir for up to 2 hour operation, external 250 mL bottle for up to 1 week operation |
| USB |
Type B connector, USB 2.0 compatible 12 MB |
Type B connector, USB 2.0 compatible 12 MB |
Type B connector, USB 2.0 compatible 12 MB |
| RS-232 |
9-pin, D sub connector |
9-pin, D sub connector |
9-pin, D sub connector |
| Anolog Output |
0 to 10 V proportional to concentration (log scaling) or DMA voltage control |
0 to 10 V proportional to concentration (log scaling) or DMA voltage control |
0 to 4 volts proportional to concentration, log scaling |
| Front Panel Display |
140 x 32 pixel VF display provides output of particle concentration, bar graph history of particle concentration, particle totalizer, flow rate, and operating parameters |
140 x 32 pixel VF display provides output of particle concentration, bar graph history of particle concentration, particle totalizer, flow rate, and operating parameters |
6 digit, 7 segment LCD, provides output of particle concentration |
| LEDs |
Particle, status, flow, liquid |
Particle, status, flow, liquid |
Particle, status, flow |
| Buttons |
Display, totalizer, pump, drain/prime |
Display, totalizer, pump, drain/prime |
Pump |
| Rear Connections |
USB, com port, power, water source, vent, water drain, pump exhaust, aerosol inlet (1/4" OD SS tube), analog output BNC |
USB, com port, power, water source, vent, water drain, pump exhaust, aerosol inlet (1/4" OD SS tube), analog output BNC |
Water, fill, exhaust |
| Side Connections |
N/A |
N/A |
Transport bypass lever, serial RS-232, USB, power, fan |
| Software |
Supplied with TSI Aerosol Instrument Manager software |
Supplied with TSI Aerosol Instrument Manager software |
Supplied with TSI Aerosol Instrument Manager software |
| Calibration Check |
Recommended annually |
Recommended annually |
Recommended annually |
| Power Requirements |
100 to 230 VAC, 50/60 Hz, 125 VA |
100 to 230 VAC, 50/60 Hz, 125 VA |
12 VDC, < 30 W; external table top power supply, 100 to 240 VAC, 50/60 Hz, 100 W max. |
| Dimensions (HWD) |
31 x 16 x 28 cm (12 x 6 x 11 inches) not including fill bottle or bracket |
31 x 16 x 28 cm (12 x 6 x 11 inches) not including fill bottle or bracket |
18 x 13 x 18 cm (7 x 5 x 7 inches) not including fill bottle or bracket |
| Weight |
5.5 kg (12 lbs) |
5.5 kg (12 lbs) |
2.3 kg (5 lbs) |