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​3710 Composite-only Portable Sampler

Single-bottle sampling up to 4 gallons

The 3710 Sampler combines simple operation and high volume capacity for single-bottle sampling. It collects composite samples - based on time or flow intervals - in a 2.5 gallon glass or polyethylene bottle, or a 4 gallon polyethylene bottle. Up to 24 sampling stop and resume times can be preset for unattended, automatic sampling.

Setup and programming is a snap. Simply choose the options you need from the selections displayed on the two-line, backlit LCD.

With a thermal resistance of R-11, you can be assured of maximum effectiveness for cooling samples. A thick, one-inch foam insulated base keeps the unit more rigid, and less affected by ambient temperatures.

Standard Features

  • Fail-safe float shutoff prevents overfilling of sample bottle
  • Exclusive LD90 Liquid Presence Detector and pump revolution counting system ensure accurate, repeatable sample volumes.
  • Quick, easy setup for:
    • Uniform time intervals
    • Non-uniform time intervals
    • Flow-paced sampling with or without time delay
  • Thick foam insulation (R-11) and 20-lb ice capacity (with 4-gallon bottle) to preserve samples.
  • 3710 Controller is housed in a NEMA 4X and 6 (IP67) environmentally sealed enclosure, and is fully interchangeable between portable and refrigerated samplers.


  • Wastewater effluent
  • Stormwater monitoring
  • CSO monitoring
  • Permit compliance
  • Pretreatment compliance

Options and Accessories

  • Composite sampling bottle configurations - 1 x 2.5 gallon (9450 ml) polyethylene or glass; 1 x 4 gallon polyethylene
  • Suction lines and strainers
Size (Diam x Ht):19 x 28 inches (49 x 73 cm)
Weight:Dry, less battery - 32 lbs (14.5 kg)
​Material:Fiberglass-reinforced plastic with UV-resistant gel coat
​Power required:12 VDC (Supplied by battery or AC power converter.)
​Intake Purge:​Adjustable air purge before and after each sample.
​Tubing Life Indicator:Provides a warning to change pump tubing.
Intake suction tubing:Vinyl or Teflon®; 3/8 inch (1 cm) or 1/4 inch (0.6cm) ID; 3 to 99 feet (1 to 30 m) Length
Maximum Lift:26 ft. (7.9 m)
Typical Line Velocity at Head Height:2.5 ft./s @ 3 ft; 2.5 ft./s @ 10 ft; 1.9 ft./s @ 15 ft. (0.76 m/s @ 0.9 m;
0.76 m/s @ 3.1 m; 0.58 m/s @ 4.6 m)
Liquid presence detector:Non-wetted, non-conductive sensor detects when liquid sample
reaches the pump to automatically compensate for changes in
head heights
​Weight:11 lbs (5 kg)
Size (HxWxD):10 x 12.5 x 10 inches (25 x 32 x 25 cm)
Operational temperature:32° to 120°F (0° to 49°C)
Enclosure rating:NEMA 4X, 6 IP67
​Program memory:Non-volatile ROM
​Flow meter signal input:5 to 15 volt DC pulse or 25 millisecond isolated contact closure.
Sample frequency:1 minute to 9,999 minutes, in 1 minute increments. 1 to 9,999 flow pulses.
Number of Samples:Up to 200 composite samples. (Fail-safe float shutoff.)
Interface port:8 pin connector; data output at 2400 baud in ASCII. RS-232 format with handshake.
Clock accuracy:1 minute per month, typical, for real time clock
Sample frequency:1 minute to 99 hours 59 minutes, in 1 minute increments. Non-uniform times in minutes or clock times 1 to 9,999 flow pulses
Sample pacing:Uniform time, non-uniform time, flow. Flow pacing is controlled by external flowmeter pulses.
Sample volumes:Programmable from 10 to 9,990 ml in 1 ml increments
Sample retries:If no sample is detected, up to 3 attempts; user selectable
Rinse cycles:Automatic rinsing of suction line up to 3 rinses for each sample collection
Program storage:3 sampling programs
Sampling stop/resume:Up to 24 real time/date sample stop/resume commands.
Controller diagnostics:Tests for RAM, ROM, pump display, and distributor