Used Güntner Condenser Guntner Gvh 082B/2X4 Nd for sale (8,157)

Condition: excellent (used), functionality: fully functional, Sabroe / York / Stal Ammonia Refrigeration Plant (NH3) General specifications of the set: Main brands: Sabroe, York, Stal, Arctos Refrigerant: R717 / NH3 (Ammonia) Description: Complete, high-capacity industrial refrigeration installation, comprised of multiple integrated modules. The complete line includes: 1. Screw Compressors: - Sabroe SAB 83 (2004): Volumetric capacity 1603 m³/h, rotational speed 3600 rpm, dimensions: 3900 x 1250 x 2150 mm. Dkjdpjyp H Tzsfx Akher - York Refrigeration SAB 83 (2001): Volumetric capacity 1331 m³/h, speed 2950 rpm, dimensions: 3150 x 1300 x 1600 mm. Set includes a pressure vessel 675 l (800 x 800 x 2150 mm). - ABB Stal Refrigeration S26B (1994): Dimensions 1550 x 1450 x 2400 mm. - Stal Refrigeration AB SVA26E (1991): Compressor type S26A-25, capacity 700 m³/h, dimensions: 1600 x 1000 x 2420 mm. 2. Separator Vessels and Pumping Stations: - Stal-Astra NH3 Separator (1991): Insulated, capacity 4300 l, dimensions: 4100 x 1400 x 1400 mm, equipped with ammonia pumps. - Stal-Astra NH3 Separator (1991): Insulated, capacity 3000 l, dimensions: 4100 x 1100 x 1100 mm, equipped with ammonia pumps. 3. Auxiliary Equipment and Control Systems: - Arctos ARLEX ND Degasser (2018): Modern module supporting the efficiency and safety of R717 operation, dimensions: 570 x 400 x 1100 mm. - Main Control Cabinet: Extended central unit, length 4.8 m, equipped with modern Siemens touchscreen HMI, dimensions: 4800 x 630 x 2200 mm. - Rittal Control Cabinet: Equipped with a WEG frequency inverter, dimensions: 1000 x 600 x 2280 mm. This high-capacity refrigeration installation combines proven, high-performance screw compressors from leading manufacturers. The inclusion of large, insulated separator tanks with integrated pumps guarantees adequate power reserve and operational stability for ammonia cycles. Despite the varying ages of individual components (1991–2018), the system operates as an integrated whole, managed by an advanced central unit featuring solutions from Siemens and WEG.

Condition: used, Air condenser from an ammonia refrigeration system with a maximum output of 180 kW. Dsdpfx Ajxzqtuekhokr Additional title: radiator Performance per fan: 2 kw Position: to be installed outdoors on site Base construction: Housing with fans and coolers Features: 3 fans, Alpine main switch

Condition: used, mileage: 36,256 km, power: 123 kW (167.23 HP), first registration: 03/1974, fuel type: diesel, number of seats: 21, gearing type: mechanical, emission class: euro1, color: red, Year of construction: 1974, Equipment: air conditioning, fog lights, power assisted steering, trailer coupling, = Additional options and accessories = Djdey Hwx Rspfx Akhskr - Armrests - Autoradio - Climate control - Electrically operated mirrors - Head rests - Hydraulic power steering - Kitchen - Portable radio set - Refrigerator - Sunroof - Sun visor - Tables - Tachograph = More information = Transmission: 6 gears, Manual gearbox Engine capacity: 1.974 cc Dimensions (LxBxH): 675 x 261 x 240 cm Make of engine: Mercedes Benz Tyre tread remainder on axle 1: 70% Tyre tread remainder on axle rear: 70%

Condition: good (used), Year of construction: 2020, Daikin ERQ200A7W1B Condensing unit Serial: 8008515 2020, condensing unit, Gas R410A, 3Ph Dksdpfx Akju U Iyqehjr

Year of construction: 2014, condition: good (used), Technical Data – Condenser Maximum volume flow rate: 300 m³/h Maximum condenser dimensions in delivered condition: approximately 430 mm x 1610 mm high, cylindrical part: approximately Ø 273 mm Weight of the chamber in delivered condition: approximately 80 kg Capacity of the upper part (condenser): approximately 30 L Capacity of the lower part (collection container): approximately 28 L Material of elastomers: NBR/FKM/PTFE Maximum condenser temperature: 1 to 80 °C Maximum condenser vacuum: 0 to 1000 mbar (absolute) (Condenser not suitable for overpressure!!) Maximum heat exchanger temperature: 1 to 80 °C Heat exchanger working fluid: water Maximum water pressure in heat exchanger: 10 bar Material of heat exchanger: tin-plated copper Dodpfx Akocpwhbjhskr Material of condenser: stainless steel For technical questions or other sizes, please inquire.

Year of construction: 2014, condition: used, This listing is for a Mueller PyroPure P4003 Pure Steam Condensing System. The unit is in full working condition and is ready for immediate release. This Unit was installed new in 2015 by Freestead Process Technology. This Unit is fitted with a Allen Bradley Compact Logix PLC and Panel View plus 1000 HMI's- Dkodpsxv Agcefx Akhjr Product Overview: The Mueller P4003 is a high-capacity pure steam condensing system, part of the trusted PyroPure series. Designed for pharmaceutical manufacturing, this system produces pyrogen-free and endotoxin-free water-for-injection (WFI) by condensing pure steam. Built to meet or exceed U.S. Pharmacopoeia (USP) standards for WFI, as well as CE marked and FDA compliant with 3.1B material certification. It is a versatile solution for facilities requiring both pure steam and WFI quality distillate. Its robust design and advanced features ensure reliable operation, compliance, and minimal maintenance. Key Specifications: Model Number: P4003 Capacity: 100 gallons per hour or 379 litres per hour of WFI-quality distillate. Pure Steam Inlet: 807 pounds per hour or 366 kilograms per hour. Coolant Requirement: 978 gallons per hour or 3702 litres per hour. Pure Steam Output Compliance: Pyrogen-free and endotoxin-free, meeting USP WFI standards. Core Features High-Quality Output: Produces pyrogen-free steam and WFI-quality distillate, ideal for pharmaceutical-grade applications. Utilizes a tangential nozzle design for optimal impurity separation in the pure steam generator. Efficient Design: Fully drainable components eliminate contamination risks and ensure clean operation. Electro-polished 316/316L stainless steel with a maximum surface roughness of 20 Ra for all product contact areas. USP Class VI-certified elastomers for enhanced safety and regulatory compliance. Ease of Maintenance: Removable tube bundle in the condenser allows for easy cleaning and inspection of critical surfaces. Requires only 24 inches of clearance on all sides for service and maintenance. Minimal instrumentation with just one control loop simplifies operation and reduces potential downtime. Installation Flexibility: Can be integrated with a PyroPure pure steam generator for dual production of pure steam and WFI. Optional stand-alone design for remote installation at the point of use, adding versatility to your setup. Applications: Pharmaceutical Manufacturing: Sterile environments, autoclave processes, and critical cleaning procedures. Biotechnology: Providing WFI for sensitive biological processes. Healthcare: Humidification and sterilization in clean rooms or hospital sterilization units.

Condition: new, Year of construction: 2024, functionality: fully functional, machine/vehicle number: 245988600001002, nominal power: 378.4 kW (514.48 HP), total length: 6,900 mm, total width: 1,100 mm, total height: 2,300 mm, type of cooling: air, Brand new Lu-ve EAV80-90 air-cooled condenser for Freon. We can supply this condenser with matching fans. The condenser block has minor transport damage. The condenser has a capacity of 378.4 kW at an air flow rate of 80,000 m³/h. Specifications: Brand: Lu-Ve Model: EAV80-90 Product type: air-cooled condenser Capacity: 378.4 kW (based on an air flow of 80,000 m³/h) Number of fans: 6 Refrigerant: Freon Dodpfsx A Ta Tjx Akhjkr Surface area: 716.1 m² Dimensions: 6900x1100x2300 mm (LxWxH) Weight: 1047 kg Year of manufacture: 2024

Condition: new, Year of construction: 2025, functionality: fully functional, FOR IMMIDIATE DELIVERY EX OUR WAREHOUSE IN DENMARK: DEMO MACHINE - MACHINE SUPPLIED WITH ROBOT (OR WITHOUT ON REQUEST) General: • Total power: 52.36 kW • Power supply: 380V / 50Hz / 3PH • Air supply: 0.6–0.7 MPa • Total weight: 7,850 kg • Machine size: 7400 × 4,620 × 2,650 mm Control system • Brand: SYNTEC Panel size • Length: 250 – 2,800 mm • Width (X/U): 250 – 650 / 1200 mm Dkjdpfx Ajyhb I Rjkhsr • Thickness: 10 – 60 mm Max. traveling speed • X axis: 135 m/min • Y axis: 75 m/min • Z axis: 30 m/min Transmission mode • X axis: Rack and pinion • Y axis: Rack and pinion • Z axis: Ball screw rod Drilling blocks • Boring block qty: Top 2+2 / Bottom 1+1 Drills • Top vertical drills: 19 × 4 • Top horizontal drills: X: 3 × 8 + Y: 2 × 4 • Bottom vertical drills: 9 × 2 Drill specifications • Max. drill diameter: Ø35 mm • Drill spacing: 32 mm • Rotation speed: 5000 rpm • Shank diameter: Ø10 mm • Tool holder: 4 × ER25 • Spindle power: o 2 × 3.5 kW o 2 × 5.5 kW o Max. 18,000 rpm Dust collector • Quantity: o Top: 4 × Ø200 mm o Bottom: 2 × Ø125 mm • Air speed: ≥ 28 m/min SUPPORTING INFORMATION ACCORDING TO PDF ATTACHED

Condition: good (used), Rexroth IPC40.2G1A-512N-P8C-ND-NN-FW Control Unit R911306516-102 Dkodsib H Eispfx Akhjr CFG-BTV16.1AN-DL-NN-NN 1070170017-118 FWA-BTVBP8-W2k-01VRS-DE-OEMR911306448-101 Financing through our bank is also possible. komplett-konzept.leasingo.de Find more items – new and used – in our shop! International shipping costs on request!

Condition: excellent (used), MyRef MY-ZB26-TFD refrigeration unit MyRef MY-ZB26-TFD condensing unit suitable for refrigeration applications Typical applications are Freezer cabinets in supermarkets and minimarkets cold stores Beer cellars Milk cooling systems Standard equipment Copeland Scroll M compressor ZB series with sound insulation hood Oil sump heater Liquid receiver with burst protection Filter dryer Sight glass visible from outside Ball shut-off valves Component-tested combined HP/ND safety pressure switch Electrical equipment: IP 55 switch box, compressor contactor, DIN rail mounting Condenser is integrated and protected in the housing Condenser fins coated with epoxy resin phenol (gold paint*) High-quality housing: solid in 1.5 mm galvanized and powder-coated sheet steel, base plate and feet in 2 mm sheet steel Frame construction with individually removable panels; all screws and components can be accessed from the front with minimal effort Djdpfjvtl T Dex Akhskr Blind rivet nuts with carriage bolts for secure, durable fastening without rust problems Pressure-controlled speed regulator with EMC filter Space-saving installation of several units next to each other possible; required mounting distance 25 mm Type: MyRef -ZB26-TFD Copeland Scroll Condensing unit Type: MyRef -ZB26-TFD Built-in compressor type: ZB19-KQE-TFD-525 Sound pressure level: 39 dbA-10 m Collector volume: 6 liters Air volume: 4500m³/h Cooling capacity: 9 kW Voltage: 400V,3PH,50Hz Power consumption: 8.9 A Dimensions: HxWxD 715 x 1120 x 450 mm Weight: 102 kg Financing through our bank is also possible. komplett-konzept.leasingo.de You can find more items - new and used - in our store! International shipping costs on request!

Condition: good (used), Ultrafilter ultraaqua autoclean 0016 AC Donaldson Ultrafilter ultrafiltration system for compressed air compressor condensate Oil/water separator for compressed air condensate. ● Treatment plant for separating compressed air condensate and condensates with difficult separation properties (e.g. stable emulsions) by means of cross-flow filtration ● Physical separation principle guarantees residual oil content of < 5 mg/l in water Intelligent control concept with programmable control for safe analog operation, incl. plain text display by means of text display, Fault monitoring via alarm messages with potential-free contacts and optional external network connection Optimized cleaning by comparison of input/output extends cleaning intervals and saves operating costs ● Thermally and chemically highly resistant ceramic membrane with long service life ● Antifreeze protection with integrated heating ● High-quality, corrosion-resistant materials for vessels, piping, pumps, seals, and valves Manufacturer: Donaldson Ultrafilter System type: ultraaqua autoclean 0016 AC Electrical data: 3 x 380 V, 50 Hz, 2.6 kW Compressed air: pmin: 5,5 bar, pmax: 8,5 bar, Pneurop 4 Water: pmax: 5 bar Membrane: pHmin: 1, pHmax: 11, tmin: 5°C, tmax: 70°C Financing through our bank is also possible. Dksdpfoidx Uisx Akhor komplett-konzept.leasingo.de You can find additional filtration systems in other sizes—new and used—in our shop! International shipping costs upon request!

Condition: used, 3 axis counter digital display ND 780 The digital display is in good condition Type: DN 780 ID No.: 520 010-01 S.No. 57 587 193 G V6 Dedoylcvwspfx Akhokr

Year of construction: 2025, condition: new, functionality: fully functional, Efficient and gentle removal of excess liquid instead of long draining times: The pressure dewatering unit has been specially designed to efficiently remove excess liquid from preserved vegetables as well as pickled or thawed vegetables. The machine is easy to operate and can be handled by a single person. Djdpfxsxc T Nuj Akhokr The product to be dewatered, such as canned mushrooms, pickled or thawed vegetables, is placed into the perforated crate. Once the system is started, a plate is lowered onto the product. The product is gently dewatered by applying uniform pressure over this plate. Efficient dewatering and minimal space requirement! The processing of pickled, thawed, or preserved vegetables is simplified and accelerated, as prolonged draining times are eliminated by efficient dewatering through gentle pressing. Due to its compact design, the machine requires minimal space and can therefore be easily integrated into various areas of production. Adjustable working pressure: approx. 6 bar Dimensions (LxWxH): 700x650x1200 mm Weight: approx. 150 kg

Condition: excellent (used), Conventional lead and feed screw lathe from manufacturer Nardini S.A. Máquinas e Ferramentas, model ND 220 SE. Well-maintained machine in technically flawless condition. Technical Data: Machine type: Lead and feed screw lathe Manufacturer: Nardini Model: ND 220 SE Control: Conventional Center height: 220 mm Distance between centers: 1,000 / 1,500 mm Swing over bed: 440 mm Swing over cross slide: 270 mm Swing in gap: 630 mm Gap length in front of faceplate: 200 mm Spindle Spindle nose with short taper size 6, DIN 55027 Spindle bore: 52 mm Internal taper: 1:20 Reducer bush: MT 4 18 spindle speeds: 25 – 2,000 rpm Feed and thread range 132 longitudinal feeds: 0.057 – 2.645 mm/rev 132 cross feeds: 0.028 – 1.322 mm/rev 54 metric threads 54 Whitworth threads 54 module threads 54 diametral pitch threads Leadscrew pitch: 6 mm Carriage & Compound Cross slide travel: 250 mm Top slide travel: 125 mm Max turning tool section: 20 × 20 mm Top slide swivel range: ± 45° Tailstock Quill diameter: 60 mm Internal taper: MT 4 Quill stroke: 200 mm Lateral offset: 15 mm Drive Dkjdpfx Ajypcpxokhor Main motor: 3-phase 380 V / 50 Hz, pole-reversible, 3 / 6 kW Coolant pump: 0.09 kW Operational Advantages - Robust machine bed - Very large feed and thread range - Suitable for both single-part and series production - Easy operation - Durable industrial quality Used machine Technically tested Fully functional Ready for immediate use Delivery time: Immediate Ex-works, loaded free of charge Loading: Forklift available Transport / shipping: can be arranged

Condition: not inspected (used), Various chillers and condensers/liquefiers from bottling plant, dismantled, for sale, among others: 10 cooling plants, make Hafner + Muschler, complete on frames, each with 2 compressors, incl. electrical- and control cabinet, refrigerant R134a, power consumption: 150 kW / 198 kW / 238 kW, years of construction 2002 - 2008, dimensions each approx. 3,100mm x 1,600mm Dsdpfx Akoh Nq E Sjhekr 3 condensers/liquefiers, make Thermofin, each with 4 fans, years of construction 2006/2008/2016, dimensions each: 4,200mm x 2,300mm 4 condensers/liquefiers, make Güntner, each with 8 fans with 890 rpm, 246.7 lt volume, 32 bar, year 2002/2016, dimensions: 6,150mm x 2,300mm 2 condensers/liquefiers, make Güntner, each with 6 fans, 93 lt. content, 28 bar, year 2002, dimensions: 6,050mm x 2,400mm

Condition: ready for operation (used), Year of construction: 2015, A Bosch low-pressure steam boiler is available. Total volume: 2480l, max. permissible pressure: 0.5bar, test pressure: 2bar, max. permissible temperature: 110°C, steam output: 1400kg/h, insulation thickness: 100mm. Machine dimensions X/Y/Z: approx. 2850mm/3800mm/3350mm, weight: approx. 3350kg. Documentation available. On-site inspection is possible. Dkjdpou Ilcljfx Akhor

Condition: used, Year of construction: 2002, functionality: fully functional, machine/vehicle number: Typ VAP ND, Steaming chamber external dimensions (WxDxH): 7100x2200x4250 mm. The steaming chamber has been dismantled. Dkedpfx Asxrlvxskhor

Condition: used, Used SGL Carbon Technic Sas (France) model CKL7 diam.16 - 10 blocks, graphite (DIABON NS1) heat exchanger/cooler-condenser with surface area 102,6 sq. meters. Has 10 graphite blocks, each diameter 765 mm x 347 mm height. Construction material of shell P265GH (W.Nr. 1.0425). Process side rated full vacuum/3bar at 1 to 110 deg.C. Design pressure -1/3Bar at 1 to 110 deg.c. Service side rated 5 bar design pressure at 1 to 40 deg.C. Process side capacity 542 litre and service side capacity 648 litre. Product inlet diameter: 450 mm and 100 mm outlet. Dimensions: 1000 mm diameter x 4520 mm height. Mounted on (3) lugs. New 2010. Transport dimensions: 4700 mm lenght x 1 450mm width - 1700 hight. Transport weight: 5 600 kg, (only exchanger 4950 kg). Weight: Actual: Kg5600.0 Dkjdpfeyi Ewfsx Akhor

Condition: used, The device is operational Dkodpfexn Uuisx Akher

Year of construction: 2011, condition: good (used), Description Dodpfedypicox Akhjkr Brand Copeland Model MC-S9-ZB56KE ID 7203 Status Active Year of manufacture 2011 Location Oradea (RO) Air cooled condenser Copeland MC-S9-ZB56KE manufacture in 2011. Copeland model D3DA4-75X-AWM compressor, manufacture in 1998, 3 cyl., suction capacity 32.2m3/h. Max. pressure: 28/22.5 bars. Complete switchbox. ExWorks. Price is negotiable. Technical inspection can be organized at least 24 hrs before the due date We speak English. Wir sprechen Deutsch. Hablamos Español. Beszélünk magyarul. Irrtum, Anderungen und Zwischenverkauf vorbehalten / Subject to errors, changes and prior sale / Ne rezervam dreptul la greseli, modificari si vanzare prealabila.

Year of construction: 2003, condition: like new (used), machine/vehicle number: 67099.031501, Used Ravas floor weighing scale Ravas floor weighing scale, model: RWB ND CE, serial number: 67099.031501, year of construction: 02-06-2003, max/min: 1500/20 kg, e=dd= 1kg, dimensions: 1300 mm x 900 mm x 50 mm. with wall display. Benefits: Stainless steel scales can be safely used in the food or chemical industry. You can weigh palletized goods more easily than on a platform scale, because you don't have to climb the load on ramps. You can transport the scale easily, because it is equipped with wheels and handles You can sanitize these scales at any time, because they are IP68 certified You can easily weigh loads up to 1,500 kg on EUR1 pallets Price: 1.250 Euro + VAT, negotiable, FCA Oradea/Romania Dkjdji E Hxxjpfx Akhor Irrtum, Anderungen und Zwischenverkauf vorbehalten / Subject to errors, changes and prior sale / Ne rezervăm dreptul la greșeli, modificări și vânzare prealabila. We speak English. /Wir sprechen Deutsch./ Beszélünk magyarul. /Nous parlons français/Vorbim romana

Condition: excellent (used), Year of construction: 2011, functionality: fully functional, Sturtz fully automatic welding (2 machines x 4 head) and double head corner cleaning line - 1 x welder VSM40/26 - 1 x welder VSM30/26 Dedpfx Aksvkdubohokr - 1 x handling with verticat transport system - 1 x tilting table - 1 x 2 head corner cleaner with drilling head's - 1 x outfeed table adjusted for Rehau Brillant/Euro70, Synego and Geneo the line is still in production, can be inspected in working conditions fully functional, very good conditions

Condition: excellent (used), - NEW PRICE - Due to business closure, being sold for a special reason. 1 cantilever rack, single-sided, consisting of 5 uprights (IPE160) and 20 arms (IPE100) 1200 mm, overall dimensions: (W x D x H) 6120 x 1300 x 4150 mm Load capacity per arm: 500 kg Includes new "Würth" screws. Dkjdsza Ayropfx Akher Without dismantling and transport.

Year of construction: 2018, condition: like new (used), functionality: fully functional, TECHNICAL DETAILS Load cell: 2 pcs Xforce K Testing software: testControl II & testXpert III Load cell: Xforce K Measuring amplifier: DCSC module Documentation: available FURTHER TECHNICAL DETAILS - as per documentation, no guarantee Maximum test force Fmax: 50 kN Total height of the testing chamber: 1,534 mm Height of the lower testing chamber without attachments: 1,355 mm Height of the upper testing chamber without attachments: 1,369 mm An additional crossbeam is required for the upper testing chamber. Dsdpfx Aszpw Hdekhskr Testing chamber width: 440 mm Load frame Load frame height without uprights: 1,714 mm Load frame height with uprights: 1,829–2,694 mm Load frame width without uprights: 760 mm Load frame width with uprights: 936 mm Load frame width with uprights and machine electronics: 1,124 mm Load frame depth: 140 mm Load frame depth without uprights and with drive base: 507 mm Load frame depth with uprights: 762 mm Load frame depth with uprights and machine electronics: 765 mm Weight and footprint Weight with machine electronics, uprights and typical attachments: approx. 300 kg Net footprint: 0.01 m² Load frame footprint: 0.713 m² Average sound pressure level at maximum speed at a distance of 1 m from the front of the machine: 61 dB(A) Drive Crossbeam speed: min. 0.0005 mm/min to max. 600 mm/min Crossbeam return speed: max. 1,000 mm/min Deviation from the set drive speed: max. 0.05% of the actual value Drive path resolution: 0.317891 nm Positioning repeatability without direction reversal: ±2.0 µm Adaptive control Cycle time: 1,000 Hz Power input Power connection plug CEE 7 (Schuko) Power connection: 230 V, 1 Ph/N/PE Power consumption at full load: approx. 2.3 kVA Mains frequency: 50/60 Hz Mains-side protection of the power connection cable: 16 A Safety functions The drive is equipped with a mechanical holding brake. When switching off, when the emergency stop is activated, or in the event of a power failure, the material testing machine stops at the current position. Unintended unloading due to energy stored in the specimen is prevented.

Year of construction: 2019, operating hours: 50 h, condition: excellent (used), functionality: fully functional, workpiece length (max.): 40 mm, No minimum price – guaranteed sale to the highest bidder! Unit with only 50 operating hours! The new price was €280,000! Currently, the unit is only partially operational, as it is not currently connected to the cooling system. TECHNICAL DETAILS Component types: Screws and bolts M8 and M10 Process: Automatic inductive hardening Throughput: approx. 70–80 parts/min Processable screw length: 25 - 40 mm MACHINE DETAILS Automation and feeding Feeding: Hopper conveyor Conveying technology: Inclined conveyor Sorting: Linear sorter Singulation: Automatic Dedezmwcaopfx Akhjkr Indexing table: 8-position Nests per station: 2 Quenching medium: Water Quenching water tank: Present Discharge: Magnetic discharge conveyor Demagnetization: Present Quenching medium filtration: Cartridge filter Cooling: Prepared for connection to a central cooling system RF generator manufacturer: IDEA Heating power: 50 kW Power: 67.98 hp EQUIPMENT Hopper conveyor Inclined conveyor Linear sorter 8-position indexing table with 2 nests per station IDEA RF generator Quenching water tank Magnetic discharge conveyor Demagnetization unit Cartridge filter Temperature monitoring Component height monitoring Component type monitoring Rotation monitoring Energy monitoring Ground fault monitoring Inductor flow monitoring Inductor water temperature monitoring