Home/LabTech/Products/Laboratory Equipment/Recirculating Chillers

Recirculating Water Chillers and Temperature Control

Closed-loop cooling for AA, ICP and ICP-MS instruments, from compact to large.

Request a quote Models and specifications

LabTech recirculating water chiller range

Laboratory Equipment · 4 models

An AA, ICP or ICP-MS instrument only holds its baseline when its cooling loop holds temperature. LabTech has built recirculating chillers for that duty for more than 20 years, and the range runs from a 500 W benchtop unit to a 3,000 W cabinet, with low-temperature versions that reach −20 °C. Instrument manufacturers specify LabTech chillers alongside their own systems, and the products ship to more than 100 countries.

500 W to 3,000 W

Three families cover a single instrument, a bench of instruments or a small pilot loop.

±0.1 °C stability

PID control holds ±0.1 °C on the H150 series and ±0.3 °C on the compact H50.

−20 °C with LT

Low-temperature versions reach −20 °C for cold traps and condensation work.

115 V and 230 V

Published in both supply voltages, with the same cooling capacity and footprint.

Models

Choose the configuration.

Choosing a model is a question of heat load, bench space and how cold the loop has to go. The H50 covers small loads at 500 W, the H150 series scales from 1,000 W to 3,000 W, and the LT versions extend the low end to −20 °C for cold traps and condensation work. Every model uses PID control with a digital display and alarm reporting, and both 115 V and 230 V versions are published.

H50 series

Compact recirculating water chiller

The compact end of the range: 500 W of cooling at 25 °C, a −5 to 35 °C loop and 3.5 L/min pump flow in a 19 × 8 × 19 in cabinet. PID control holds ±0.3 °C.

500 W cooling capacity
−5 to 35 °C temperature range
3.5 L/min pump flow
PID control, ±0.3 °C stability
62 lb, 19 × 8 × 19 in

Configurations

Specification	H50-500 (115 V)	H50-500 (230 V)
Part number	LW500	LW500
Temperature range	-5 to 35 °C	-5 to 35 °C
Temperature stability	±0.3 °C	±0.3 °C
Temperature control	PID	PID
Cooling capacity	500 W	500 W
Pump flow	3.5 L/min	3.5 L/min
Dimensions (L×W×H)	19 × 8 × 19 inches	19 × 8 × 19 inches
Weight	62 lbs	62 lbs
Power supply	115 V, 60 Hz	230 V, 50 Hz

H150 series

Recirculating water chiller, 1,000–3,000 W

The main workhorse range. Cooling capacity runs from 1,000 W to 3,000 W at 25 °C, with a 8–35 °C loop, ±0.1 °C stability and 6.4–12.1 L/min pump flow. Larger capacities use the 29 × 18 × 26 in cabinet.

1,000 / 1,500 / 2,100 / 3,000 W cooling
8–35 °C temperature range
±0.1 °C stability with PID
6.4 or 12.1 L/min pump flow
115 V and 230 V versions

Configurations

Specification	H150-1000 (115 V)	H150-1000 (230 V)	H150-1500 (115 V)	H150-1500 (230 V)	H150-2100 (230 V)	H150-3000 (230 V)
Part number	LW1000	LW1000	LW1500	LW1500	LW2100	LW3000
Temperature range	8 to 35 °C	8 to 35 °C	8 to 35 °C	8 to 35 °C	8 to 35 °C	8 to 35 °C
Temperature stability	±0.1 °C	±0.1 °C	±0.1 °C	±0.1 °C	±0.1 °C	±0.1 °C
Temperature control	PID	PID	PID	PID	PID	PID
Cooling capacity	1,000 W	1,000 W	1,500 W	1,500 W	2,100 W	3,000 W
Pump flow	6.4 L/min	6.4 L/min	6.4 L/min	6.4 L/min	12.1 L/min	12.1 L/min
Dimensions (L×W×H)	22 × 15 × 21 inches	22 × 15 × 21 inches	27 × 15 × 23 inches	27 × 15 × 23 inches	29 × 18 × 26 inches	29 × 18 × 26 inches
Weight	112 lbs	112 lbs	172 lbs	172 lbs	203 lbs	203 lbs
Power supply	115 V, 60 Hz	230 V, 50 Hz	115 V, 60 Hz	230 V, 50 Hz	230 V, 50/60 Hz	230 V, 50/60 Hz

H150 LT series

Low-temperature recirculating chiller

Low-temperature versions of the H150 platform. The loop reaches −20 °C with ±0.1 °C stability, for cold traps and condensation work; cooling capacity is 1,000 W or 2,100 W at 25 °C and 100 W or 200 W at −15 °C.

−20 to 35 °C temperature range
±0.1 °C stability with PID
1,000 W or 2,100 W at 25 °C
100 W or 200 W at −15 °C
6.4 or 12.1 L/min pump flow

Configurations

Specification	H150-1000LT (115 V)	H150-1000LT (230 V)	H150-2100LT (230 V)
Part number	LW1000LT	LW1000LT230	LW2100LT
Temperature range	-20 to 35 °C	-20 to 35 °C	-20 to 35 °C
Temperature stability	±0.1 °C	±0.1 °C	±0.1 °C
Temperature control	PID	PID	PID
Cooling capacity	1,000 W@25 °C	1,000 W@25 °C	2,100 W@25 °C
Pump flow	6.4 L/min	6.4 L/min	12.1 L/min
Dimensions (L×W×H)	22 × 15 × 21 inches	22 × 15 × 21 inches	29 × 18 × 26 inches
Weight	112 lbs	112 lbs	203 lbs
Power supply	115 V, 50/60 Hz	230 V, 50/60 Hz	230 V, 50/60 Hz

Refrigerated/heating circulator

Cooling and heating circulator with open stainless steel bath

One unit for methods that need both cooling and heating. The circulator switches between the two automatically, and the open stainless steel bath accepts samples directly; a knob changes between internal and external circulation. It holds ±0.05 °C from -40 °C to 100 °C, with high and low temperature alarms and a liquid level alarm.

Cooling and heating functions switch automatically to save energy
All-stainless-steel bath, press-formed in one piece
Circulator combines with an open bath; internal and external circulation knob
PID control holds ±0.05 °C across a -40 °C to 100 °C range
High and low temperature alarms plus liquid level alarm
LCD display and RS485 interface for remote control

Temperature range	-40 °C to 100 °C
Temperature stability	±0.05 °C
Bath	Stainless steel, one-piece press-formed
Alarms	High and low temperature, liquid level
Interface	RS485

Specifications compiled from the LabTech US product pages (labtechus.com), retrieved 31 October 2026. Prices excluded; configurations vary by region.

The range

Configurations and accessories.

Smart series medium-capacity recirculating chiller

Applications

Where this range is used.

Cooling AA, ICP and ICP-MS spectrometers through long analytical runs
Laser systems that require a cooling circuit free of metal ions
Temperature-controlled bath work on the open stainless steel circulator
Methods that alternate between cooling and heating
Chiller banks monitored over RS485 from a single control point

Questions

Before you buy.

How do I choose between the H series, Smart series and large-capacity chiller?

The H series is a thermoelectric unit with no refrigerant, sized for small heat loads and for lasers that need a metal-free water circuit. The Smart series is the medium-capacity option, with microchannel heat exchange and a touchscreen terminal. The large-capacity chiller uses a fully hermetic compressor and a plate heat exchanger for high heat loads. Match the model to the instrument's heat load rather than to bench size.

Does a recirculating chiller need refrigerant?

Not necessarily. The small H series cools thermoelectrically and contains no refrigerant at all. The Smart series uses a new-generation environmentally friendly refrigerant with microchannel parallel-flow heat exchange, and the large-capacity chiller runs an imported fully hermetic compressor. If your site restricts refrigerant handling, start with the H series and check the heat load.

Can several chillers be monitored from one place?

Yes. The H series and the refrigerated/heating circulator both provide an RS485 interface, which is designed to connect multiple chillers, and the Smart series adds a touchscreen terminal with remote real-time monitoring. That lets a single point of control cover a room of instruments instead of one chiller at a time.