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Sentry - Compact Wastewater Sampler with Composite Sample Preservation
The Sentry was designed be flexible. It can be used as a portable or fixed location, wastewater sampler. Composite may be collected simple time or flow proportioned by connecting it to a suitable flow measurement system. or simple composite sample. The addition of an ice chest or refrigerator to preserve the composite sample, gives you a low cost sampling system. Its no-nonsense design means that you don’t have to be a weight-lifter to carry it, a computer expert to program it, or have an unlimited budget to afford it. The Sentry composites samples in the sample container of your choice, from one gallon to a 55 gallon barrel. It can also be used to feed a laboratory or pilot plants systems. The Sentry operates on either line or battery power.
- Collect composite samples in container of your choice
- Comply with NPDES and State permit requirements
- Chill or refrigerate composite sample in ice chest or refrigerator
- Collect flow-proportioned composite samples
- Simplify sampling procedures to avoid operator errors and missed samples
The ASM/Sentry placed near the stream or sewer to be sampled. When installed in a manhole, the sampler is positioned above the high water level. The sample inlet line is connected to the sampler’s peristaltic (squeeze-tube) pump. The size of each sample is set with the “SAMPLE ADJUST” knob. Next, the “SAMPLES PER HOUR” switch is set to collect 1, 2, 4, or 8 samples per hour, or 1 sample every 2 or 3 hours. The FILL CYCLE Switch is set to turn the sampler off after a set period of time. Finally, the “PURGE CYCLE” switch is set to purge before, after, or both before and after sample collection -- a unique power-saving feature. All switch settings are visible and the system takes the first sample right away so you know it is working before you leave the field.
CASE
- Screw-sealed, gasketed fiberglass NEMA 4X, with clear Polycarbonate cover
- Dimensions: 12-1/2”high, 10-1/2” Wide, 7-3/4” Deep
- Weight: 10 lbs
SAMPLER CONTROL PROGRAMMER
- Type: Solid state control
- Easy to use and review controls:
- Samples per hour switch: 1, 2, 4, or 8 samples/hour or 1 sample every 2 or 3 hours
- Function switch: Test, Reset, or Set positions with purge selection before, after, or both before and after sample collection
- Cycle switch: Used to set system to turn off automatically in 3,6,12, 24, 48 or 72 hours.
- Reset button on side: Resets cycle time when sample is picked up without opening programmer cover.
- Sample volume sample size between 20 and 500 ML
- Power switch: AC - OFF - DC
- Circuit protection: 3 AMP fuse
PUMP
- Type: Peristaltic
- Material: Polycarbonate
- Bearings: Low-friction ball bearings
- Tubing: Silicone rubber (medical grade)
- Flow rate: 1350 ML/minute at 3’ head
- Inlet velocity: 1.5’/second at 3’ head
- Lift: 20 feet
POWER REQUIREMENTS
- Domestic: 115 VAC, 60 HZ, 12 VDC
- Export: 220 VAC, 50-60 HZ, 12 VDC
- Maximum Power: 45 milliamp continuous,
- 1 ampere intermittent
FLOWMETER CAPABILITY
Operates in conjunction with any flowmeter providing a momentary unpowered switch closure every preset number of gallons. 4-20 MADC converter is required for analog flowmeter output.
User to supply Sample container of their choice.
OPTIONAL:
- 20-038 Inlet tubing: ¼’ID., 3/8’OD clear vinyl with stainless steel inlet weight
- 19-002 one gallon HDPE jar
- 19-003 2 gallon rectangular polyethylene
- 19-005 5 gallon polyethylene
- 15-508 Battery cable for external, user supplied, 12volt battery
- 15-010 AC/proportional hook-up cable
- 11-012PK Pump Tube pack of 4 spares