Compact All Weather Water Sampler with Refrigerated Sample Storage Area

WaterSam WS 312 is a space-saving sampler for all standard indoor and outdoor applications and together with its built-in cooling and heating features, samples are able to store reliably at the require desired temperature.


  • Weather-proof housing and roof made of durable stainless steel; upper panel door included
  • Three separate technical compartments in the upper section of the sampler to protect the pump, electronics and refrigeration unit
  • Freely adjustable and highly accurate temperature control for the sample storage chamber, for ambient temperatures from -25°C to +42°C
  • High-performance vacuum sampling system – alternatively available with any other WaterSam sampling system
  • Borosilicate glass metering vessel protected in sample storage chamber to minimize sample falsication that could stem from temperature extremes
  • Hose inlet on the left and right side; optionally from below
  • Available with XY Distributor for direct filling of numerous bottle sets without cross-contamination
  • Simple upgrade to monitoring station can be made at anytime
  • Wide range of optional equipment: housing materials, pumps, valves, etc.

Direct Bottle Filling with Numerous Possibilities

WaterSam XY Distributor system has been in use successfully for nearly 20 years and with its wide array of possibilities, reliable operation and minimal follow-up costs have made it the distributor of choice among our customers. The two-axis system makes full use of the entire sample storage chamber by using coordinates to travel and locate bottle positions.

Technical Specifications

GeneralStationary sampler for indoor and outdoor applications
NormsCE, compliant with ISO 5667
Dimensions1,020 x 590 x 590 mm (HxWxD)
Width including mounting rails: 720 mm
WeightApprox. 70-80 kg, depending on Configuration
Power Requirements230 V AC (optional: 110 V AC), 50 Hz (optional: 60 Hz), Main fuse 16 A
Approx 750 Watts Max include High Performance Cooling or Heating
Ambient Temperature-25 °C to +42 °C
Sampling SystemVAC vacuum pump system for time-, volume-, event-proportional sampling
Optional: VAR-B, VAR-E, VAR-C or peristaltic pump for flow-proportional sampling (variable volumes)
Sampling Volume12 – 200 ml (multiple-shot sampling possible)
Optional: up to 2000 ml (without distributor)
Sample VesselDURAN 50 borosilicate glass; dishwasher-safe, resistant to acid, alkali, and temperature fluctuations
Pump PerformanceMax. 8 m lift height;
0.5 m/s up to 6 m lift heights;
14 l/min free flow
– high-performance pump (19 l/min)
– VacuPress for lift heights up to 30 m
Intake Hose12 mm ID PVC
Wetted PartsBorosilicate glass, PE, PVC, stainless steel 304/316Ti, silicone (optional: alternative materials as required)
Housing MaterialStainless steel 304
– Stainless steel 316Ti
– Powder coating (RAL colors)
– Plastic (UV resistant)
Insulation40 mm, cold-bridge free; not foamed
Environmental ConsiderationConstruction facilitates easy separation of materials for proper recycling and disposal
PartitioningThree separate technical compartments in top dry section for electrical/electronics, refrigeration unit and other components
Placement of Sampling SystemMetering vessel in temperature-controlled sample chamber; protected from heat and frost
InstallationEasy floor mounting and firm footing with sturdy base rails
Temperature ControlPT 100 3-point thermostat
RefrigerationCompressor cooling; 230 V AC, 150 W; CFC-free refrigerant R134a; adjustable automatic defrosting (interval, time, duration, max. temperature)
Optional for corrosive environment, e.g. H2S: evaporator plate separate from sample storage chamber, clean external air drawn to cabinet via ventilation flange
HeatingElectric heating unit in stainless steel sleeve; 230 V AC, 350 W (optionally 24 V DC)
Sample StorageTemperature adjustable; pre-set to 3 °C
Distributor (Optional)
DistributorXY Distributor: two-axis coordinate system for direct depositing of discrete samples with no cross-contamination
Bottle SynchronizationAutomatic

A I ANALYTICAL PTE LTD | Address 30, Kallang Place, #06-01, Singapore 339159 | Tel: +65 6459 0785 | Email: